Thank you. This was simply amazing. Two things: 1) I'm an educator, and your ability to break down concepts is fantastic and, 2) I've been adjusting timing for 30 years and not ever really knowing why or what I was actually accomplishing. Again, thank you.
Stu, you are the most comprehensive resource for boat maintenance on the internet. I've been going back through some of your older videos to familiarize myself for a 17' project boat that I am in the middle of. Also, I like to comment because I know it helps your channel's statistics. I'm still following your new stuff too. Keep on digging, you've got Renko looking good.
Such a scruffy guy... such amazing explanations :) . Thanks so much! From experience, most mechanics I've used just go with the "close enough" approach when tuning rather than actually going with the actual tolerances set by the manufacturer. This is how to do the job properly.
Excellent video. Just like all your other videos fantastically easy to comprehend. Keep up the great work & sincere thanks for taking the time to educate all us enthusiasts.
I have learned so much from your teaching and I shop at Marine Engine.com because they sponsor your channel. This has to be one of your very best presentations. Clear, sequential and understandable, even for me! You have a gift brother!!!
These videos are genius for us hobbyists out there. I spent a couple years in a technical/trade school learning my trade, and your teaching skills are definitely on level with a great trade school! Your videos all seem to have you begging for forgiveness when things go differently than planned, which, I think is usually the most instructive part of the topic. If it worked perfect every time, we'd all no you edited too much out.
Super lucky I found this channel, been reading different web forums to try to understand and none really wraps it up like you do and still gets into the necessary specifics, really appreciate the time you into this!
Is this a unique design that Tohatsu uses or is this the majority of 2 strokes? I remember you said they have different designs. Would a 2000 merc 50 2 stroke be the same type of design? I don't have a problem now but am very interested after seeing the vid. I love understanding outboards and learning from you!! I grew up fishing my whole life but we were to poor to own a boat. I always watched boats go buy while i was fishing off the banks. So I've never been shown even the basics. Now that im grown up and have one I appreciate the hell outta of em and want to know how to fix it myself. Ive gained a lot of knowledge from you and can't thank you enough!!
Hi Jimbo, by 2000 you might find your Merc is completely computer controlled and can't be adjusted. The computer will adjust the timing to be optimal for all conditions. I didn't get my first boat until I was about 30 but now I love them. Glad the videos are helping you with your boat! :)
Enjoyed. Easy outs become hard outs when broken. One method of removal is to build up the broken bolt with TIG until there is enough material to put a nut on then weld the nut to the build up.
Terrific tutorial Stu. Rather embarrassed to say I had no idea exactly why timing advanced or when. I just new it did. Thanks for clearing that up! Also, your reference to the speed of combustion and the flame front moving down the cylinder reminded me of the many misconceptions about fuel octane out there and its effect on combustion. Another vid idea for ya!
Glad the video helped you. None of us are ever too old to learn new things. Yes, there is a lot of misconception about octane, will add that to the list.
It’s great to see that there is 18 people who don’t understand nail clippings Christ how easy is the example have to be as always great video stu happy new year to you and your family
New to boats and stumbled across your vids. I subscribed straight away due to how thoroughly you explain the situations. Your camera angles are mint as well. It's a finely polished presentation. Tip top. Going over the donk using your vids to give me confidence out on the water. Thanks heaps.
To add to the broken bolt talk, I ran into a few in my days of working on auto repair jobs and I found that if I mixed half transmission fluid and half acetone it would free up any rusted or corroded bolt or nut, give it a try, you can see it creep up the treads.
Yes, that particular combination does seem to work well, good for unseizing pistons too. It will definitely get mention when I finally get around to the video on corroded parts!
I will be waiting for your presentation of the Reeves method. love your videos, your explanations are impeccable. I just got a 77 75hp evinrude and believe I got a timing issue, scared to run it and mess with it until I do a link n sync with it and at least check the timing is close. again thanks for all your videos and will be awaiting the Reeves method.
Absolutely brilliant, Stu. Really enjoyed your presentation. I've had many highly educated university professors who couldn't come close to your ability to make the complex simple.
All good very informative video. But before attempting this make sure the carburetor is clean and the mixture is correct or you'll have wasted you time and possible made the engine run worse.
Thank you for showing and explaining the timing marks on these engines. I have a factory manual for a NS70A2 and it shows the linkage adjustment and the ignition timing but doesn't even mention where the timing marks are let alone what the marks mean. You saved me a bunch of time.
That was a sensational video Stu. Thank-you so much. I have a reasonable understanding of outboards, though was never game enough to look too deeply into adjusting the timing. I now get it. Would you believe I have a Tohatsu 90, so I am off to the shed now to check it out! You are a knowledgeable man, and I appreciate you sharing your wealth of knowledge. You not only know stuff, you also know how to teach. Well done, and thank-you again for your Channel.
Hi Stu You know that the only difference between this and the 140 hp is the throttle cam on the top carb and changing the stoppers. Can be changed in 5 min, with a plier and a wrench. Thanks for vid
I am so glad that I finally understood what's going on here ! Being an idiot in electric field, I had to stop at first, then I watched quite a few videos in fundamentals in ignition and timing, before I came back again !!! Thanks , Stu !!
I've been having trouble with my old 115HP yammie. I just checked the timing linkage after watching your video and it's completely disconnected! One of the plastic boots is broken. That could explain the problems. Going to fix it just now and see what happens. Thanks for the great video.
It's working good now. Surprised it was running at all without that linkage. There was a wire running from the throttle arm to the coil that was doing the job of the linkage, not very well
Where would you go to buy the little plastic widget that goes on the end of the link rod? I just got a quote from my local Yamaha dealer and it's $14.65!! Could I find the same thing in an auto parts store? Thanks
Hello. The flywheel ignition coil shows 531 ohm resistance, is this normal or not? tohatsu m90a engine. the remaining two coils under the flywheel give out 2 ohm resistance. Thanks for understanding
lol the world of hurt part, felt that 100 percent.. 2 bolts on the head of my force 50hp 1998. I had to cut the head off and then collapse the rest of the bolt in.
This was a great video to watch. I believe the reason you was having the issues With it being 5° retarded. Instead of 10° Could possibly be The manufacturer's specifications. Because they are sometimes put together on an assembly line. The very changes But you made the best you could do with the throttle linkage. Great job. And to make this planning simple as sometimes. The factory specifications are wrong. For they don't match up with your Linkage.
Please Help. I have an 1989 Johnson 70HP rebuild by Coastline Marine in Florida. The rebuild cost $3180. (rebuild include: bore the 2 bottom cylinders to the next larger size piston. replace the top piston for cylinder 1, rebuild carbs, new thermostat). The guy told me to check the ignition and timing by a mechanic. I have called every marina in Boston area to have them check the timing for me but no one is willing to work on older motor so I have to check the ignition/timing myself. I have watched TH-cam videos bought 2 manuals to do the timing/ignition myself. When I check the TDC of the motor, new TDC mark that I've found is 2.5" to the left of the factory TDC. Is this correct ? TDC needs to be correct before I can continue forward. Thanks for your help.
Great lesson. You have the Green Machine, my project is the Invader. 1985 75 hp Mercury 2 stroke, so far I’ve gone through the carbs and fuel pump, timing is next. It would be timely if you did a video on the timing of Mercuries. Best regards from Lynden, Washington. U.S.A.
Excellent teacher you are. I have a 2 stroke Yamaha 25 hp with 2 carbs 2008. I bought it new. At idle speed I couldn't get the pop out of it. After watching you on utube I adjusted the carbs in sync, and replaced lower unit leaking seals. Also with your instructions I got the pull rope working on a 9.8 Merc., and if I would have used your water pump drill test I wouldn't have changed the water pump. It was fine. The engine has a warped aluminum plate ,and 2 bad gaskets on the power head which turns the water to steam. I cleared the copper tube, and the rubber lines to the pisser. Parts are on order. Hope to have the motor running next week. Low,low hours on this motor which is worth fixing.
All of your videos are excellent. I have a 1988 70 hp mercury and have done a lot of my own work. Too bad you aren't in the Land of Pleasant Living (Maryland Chesapeake Bay)
And for the new 4 stroke motors, you must use a timing light. And what I don't like is they don't have physical marks. They only put a sticker on the top of Most fly wheel with the timing marks. I wish they would engrave them in the file.
Good job on this and all your videos. When I read my Yamaha Outboard's Service manual, then with work I can sometimes figure out what I am supposed to do, but your videos give me much more depth about how I do it and more importantly your videos tell me why I am supposed to do it. You are doing a great job of sharing information. Thank you!
I have a similar problem with an ‘88 110 Johnson but can’t figure it out. The timing sets while running using a light and I can’t get it to idle correctly. When I engage the transmission it dies, so I know the timing is not right. But this motor may be missing some stops. I’m just not sure because my book doesn’t have the specific model I have and the procedures are different I guess. Any help?
This helped me a lot however, My boat has a 70hp johnson and it has no power in the water under a load. I checked the operation of the linkage and the timing rod is not moving with the throttle linkage at all. I have adjuste the throttle to be centered for forward and reverse but now i cant get the timing rod to even move. I can't see how the lever on the throttle bracket ia even making the timing rod move, it is hitting no where. How do i get it back operational
I had some problems with my Yamaha 55 and I watched all your videos and must tell you that I have learned a lot.... Thanks for all your help. Now I need to find manuals for my outboard.
Hello, I got a mercury 3 cyl 60hp from 1987 and was wondering where can I get a repair manual for it, on google found emanualonline, seloc, clymer and tradebit as pages to buy a manual for said engine but I never bought a online manual so was wondering if you could give me a bit of help with it, only manual i ever bought was for a vauxvall nova via ebay and was made from haynes (book), cheers. The stator of the engine broke and the distributor had the 4 cables in bad shape wich I fixed the second and about to buy new stator but its been many years since I last heard the engine running and may be a bit out of sync because when removing the distributor to fix the cables had to unscrew the part that connects it to the linkage of the throttle so Im looking for a manual to be sure everything is how should be.
I'm having an issue and can't find a manual for my book about timing it's a 1989-90 HP etlf all the manual companies keep sending me a 1988 90 HP ETF manual and and the linkage measurements arent the same. 😫I went to do a link and sync and followed the manual and I went from a to b and when I got to c which is the top link next to the flywheel and stator it said to make it 74 mm and there's not 74 mm of linkage there it will barely go to 64 mm. So now I know this is not the right manual and when you look it up on Google every and any website is offering this manual for my 90 etlf made in 1989 and this book is not the correct one. I now have my linkages all messed up can't find an idle speed or full throttle speed because this book can't be the right book so I'm afraid to follow that. And I can't go off of linkage measurements because I've already seen this book is not the one being that c link doesn't even go as long as the service manual calls for. I know this is an unmolested engine so the linkage is not something different or has been replaced please help me I can post a video on my page showing you everything so you can just comment and react or I can video chat with you on whatever platform you desire or we can start out over email I'm trying to get this finished before 4th of July my family would love to see the fireworks on Hartwell lake and I don't want to mess my engine up running it with the idle speed and the full throttle speed all out of spec and neither of the stoppers in the right place. I see that you're more mechanically inclined with outboards than anybody on TH-cam or the entire internet so I figured you knew exactly what idle degree and full throttle degree settings that I should set it with my timing light so I wouldn't have to worry about measuring linkages or if you knew where to get the right manual or if you no at least where I need to start or maybe what I need to do it's like the manual for my motor doesn't exist and all of the companies keep offering the same one for my year model your videos save me a lot I don't know what I would do without your channel please help me out I need to at least get the boat on the water before the summer ends if not then before 4th of July. it runs like a top it just had a rough idle so that's why I was doing a link and sink and I wanted to make sure that my carburetors were opening at full throttle with my full advance linkage on the timing end of things and that's the reason why I was messing with all of this other than that she runs like a dream but I'm not sure now that I've done messed up all the linkages again please help thanks man!
Really brilliant video thank you. It was five years ago so no idea if I will get a reply but I was going ask a question. My Yamaha 90A manual talks about going on to check the timing while running with a light - fine - but it talks about using a test prop presumably so that the motor is under a known load - is that really needed?
An observation: the timing linkage socket was above the ball instead of on it, maybe this was part of the problem, IE causing binding. Also, I worked on an old 1977 140HP Evinrude V4 where the tubing over the timing stator wires had hardened and cracked. This was preventing proper movement of the stator and was flexing the wires all in one spot stressing and breaking them. Some new wire soldered in and new heat shrink tubing fixed it right up.
Well spotted on the linkage. This outboard has a lean misfire so I'm going to be going through the carbs soon and then we'll know the true situation with the timing. Good point about those wires. Any time something moves regularly like these timing adjustments there is always the chance of fatigue cracks.
Broken screw removal specialist here........Used to be a fitter/machinist attached to a mob of sparkies who were awesome at breaking screws off in housings then breaking drills or ezy-outs inside them....
Got a question I have a 1989 Evinrude xp 150. With the silencer cover on it. I can see flashes of fire up in the carbs. Would that be a sign of reeds problems.
Why not run a little more neg timing and use high octane fuel as done with auto performance timing? There’s got to be some more power on the table based on a conservative OE timing spec and the higher rpm/timing achievable by definition.
Thanks for your articulate & intelligent presentation on timing an outboard. My engine is a 1967 Merc 500. Timing-belt's-metal-container-cap-"cap-screw" dislodged during a voyage. The belt came off the distributor shaft pulley. Ergo, my timing must be re acquired.
Thanks Rich, this video is more ignition timing but it sounds you will definitely need to get your cam and crank lined up again to put a new timing belt on. Good luck with getting it done and getting back out on the water!
It has to do with a specified tiny the screw came off after mechanic adjustment and I put in a screw with a washer but was probably not time corrected because the screw fell off after timing it from the Boat Shop was put back on by me Maybe not correct so do you think this could have caused the Piston lowering to crack in Fallout thank you very much
Great detailed explanation and video of outboard timing, I could not have completed setting the timing successfully on my Merc 150 without your help. One note, not timing related: While you cannot drill out an easy-out (or broken drill bit) for the times when you cannot get to the back of the stud, you can grind the easy-out away with ease using a 1/8 th inch Dremel grindstone.
Hi Stu, While waiting on my merc service manual tried the timing light with it running to see if adjusting the idle timing helped it run better. interesting thing is turning it in or out didn't change anything. If you turn the upper timing arm to the left it makes contact with structure, to the right no problem? weird moving the idle screw doesn't change the timing or RPM? On a car if you move the distributor it makes a huge difference. goo.gl/photos/vvUoQBK2e75qKt8q6
Timing on these older motors is a tricky one. I'll have to find an older motor to do this type of setup on, but as you say, having the service manual is pretty much essential. It's a shame it isn't something that can be done in the workshop like on this Tohatsu as hanging off the back out on the water in broad daylight makes this type of measurement and adjustment very, very tricky, not to mention a bit unsafe.
Hey stu, thinking you could do a video on broken fasteners one day- all the options...Had a 15hp Yamaha with 2 snapped Thermo bolts recently. Nightmare.. took 3 hours. Cheers!
So anything past the triangle towards the left in the video will make the spark plugs fire before the piston reaches TDC? If so does this make it run in reverse? I may have missed you explaining this in the video.
Hi mate, good question. I should have gone into the affects of timing more, maybe that would make a good follow up video. The motor always turns in the same direction. When the motor is running faster, the spark fires before TDC, but the momentum of the motor keeps the piston travelling up as the explosion is still weak in its early stages. As the piston reaches TDC the pressure is getting stronger and pushes it back down with more force (in the correct direction), peaking at 20 after TDC. If the spark fires too late, the pressure chases the piston down the bore as it travels after TDC and doesn't add much power. If the spark first too early - the timing is too advanced before TDC it can reach a strong enough pressure before the piston reaches TDC and try to push it backwards. This will cause knocking and is bad.
Great video, Stu. Listen, I’ve got a 25hp 2-stroke 3cyl Evinrude that has me pulling my hair out. Idles great in neutral and in gear but if I give ‘er I get about 10% more power and then it just holds and flutters (but doesn’t stall). If I go back down to idle all is well again. I’m going to re-do idle timing adjustment as this is what Evinrude wants me to do next. Would resetting idle timing in itself help me at higher RPM’s you think?
hi got a bit of a knock pre ignition on a mariner 40 6e9. ive set the timing and cabs etc cant seem to eliminate it, any thoughts would be appreciated thanks
Is there a way to grease the bracket from underneath The bracket on my outboard for some reason is sticking Or do I have to disassemble it all and clean it
What the great explanation of timing adjustment. I assume that on simpler older engines with mechanical linkages the advance is kind of fixed by the shape of the the curved ignition plate and the roller riding between marks for the limits of advance and connected to the throttle arm for rpms adjustment. Since the connecting rods are often bent heavy wires this by itself easy the adjustment of the rest of the low and high rpms
Again, great video with a lot of information. Did I see in some recent video your 20/25hp yamaha laying down in your backyard? I have one question about that. On my 20hp autolube the throttle plates doesnt open 100%. They open about 85% and it seems to be limitted by the throttle cam. The cam is shaped so that last few cm movement of the remote conttol does basically nothing. Otherwise the adjustments are fine, thanks to you. Could it be possible to get your opinion for the issue?
Thank you for all your videos Dangar. You are my therapist, your videos have a very therapeutic effect on me. LOL :P And im learning a fair bit about my new hobby wich is boating. :D
Hey Stu. How good are the later 2001 Tldi outboards? I have a 75 hp 2006 2 stroke Merc But am thinking about moving to Tldi. I know parts are expensive but excluding that, what do you think of the Tohatsu outboards?
Where do you get your manuals from? I’ve got one but doesn’t show ( or I can’t find) the specifications for the throttle stops and such... I found the tdc atdc and btdc settings but can’t find the throttle stop settings... mine is a 78 115hp Evinrude...
I was hoping you could help me I have a 115 horsepower Merc 1990 2+2 I have good spark on three coils jumps a 7/16 Gap but one will not unless it is running is there a problem with that one why it won't jump the same gaps as the other three
It does sounds like that coil or HT lead is bad. You'll get a higher current when the motor is spinning at speed which is why it can jump the gap when it is running, but you might want to think about swapping it out before too much longer.
I just let you no what my problem is when I have the outboard motor go hp 90A forward throttle my Tecmetering dial starts dropping the raves but no sound different on the the motor I’ve had good look around the controls as well as the outboard all is well would be very gratefully if you would have any advice on this problem the I’m having stu Kind regards !!
Great video Stu have you ever worked on a Yamaha 40hp twin 2stroke BR 40 676s model and approx 1978 think they had the mariner badge in some as I would like some info and timing set up as I can't find a service manual I've watch a few of your videos and they are very good and informative Many thank. Stewart
Hi Stewart. No, I haven't worked on one of those. As outboards around here get used daily in salt water they rarely last more than 20 years at the very most so we don't see any old outboards at all. Have you tried sites like tradebit and readmanual.com to see if they have any PDF service manuals available?
Dangar Marine Thanks very much for the quick reply and info 😀 I watched your videos from 12:30am until 05:45 and what a fantastic job you've done keep up the great work 👍🏻👍🏻👍🏻👍🏻
the only thing I was wondering is did you test idle speed submerged or just on muffs cause I know from my experience with outboards is that they idle faster on muffs do to the fact that there is no back pressure in exhaust system and most of the time the recommend idle speed is actually for when the boat is in water so submerged that may be why your idle was a little high
You're dead right about the idle. We took the boat out on the water to do some fine tuning as, yes, it should always be done on the water with the boat up to operating temperature as per this video th-cam.com/video/bsHCMJnRY9A/w-d-xo.html
FABULOUS video! Question; I have a NS90A, have cleaned the carbs and idle is fine but it will not open up all the way. It gets to a point that it wants to open up then slows and speeds just between 2800 and 3000. I am new at this and really want to get it set to run with carbs open. Can you help with any information?
I have a 1986 Johnson 50hp. I was wondering if you knew what the WOT degree setting should be as well as idle timing degree setting. Idles pretty good, WOT seems a tad off. I just dont want to burn a piston if its too far advanced.
Outstanding presentation. I'm sure you have helped many a backyard mechanic to understand how EXACTLY to set timing on a Tohatsu. I have a Tohatsu M60B and will apply this lesson today. Thank you.
I must say, I wish you were my next door neighbor, or worked at the shop down the street, I'm just not to trusting in an average person working on my boat...
Is there anything that could cause timing to be... "inconsistent"? My outboard will run full throttle but every 3-4 minutes it'll bog right down, and seemingly backfire. Honestly it seems like one of the cylinders stops firing - and then it'll perk right back up again.
thanks! yea I replaced the spark plugs and thus far I've had the most reliable performance yet. I couldn't help but notice that the plugs I pulled "looked fine" but were a bit gummy. - the following gets difficult to describe: The motor sounds quite scrubby and loud if you will, and - I even pulled out my stethescope for this, I'm almost certain its the piston rings. What confirms this is that when I run the motor in a tub I get a significant residue of oil in the water. It resembles more like grease however than motor oil. So - I have ordered a new drive shaft seal to at least rule out that I'm not also leaking gear oil. But... I"ve noticed an exhaust port above the waterline, and it too leaks oil much to the same consistency. I'm not too sure how to really diagnose this. I had thought that the exhaust came out from behind the prop, but I definitely have a port (perhaps for low rpm's?) just below the motorhead, and it has a stream of oil. I'm guessing this is from oil passing behind the piston rings (although this is a 2 stroke?) Or I have two problems and am also leaking gear oil ontop of a whole host of issues. Sorry I know that's a whole lot to digest. I tried to explain it simply but... haha this is far from a simple problem. Either way, thanks very much for your videos Stu! And again greetings from Squamish Canada!
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Thank you. This was simply amazing. Two things: 1) I'm an educator, and your ability to break down concepts is fantastic and, 2) I've been adjusting timing for 30 years and not ever really knowing why or what I was actually accomplishing. Again, thank you.
Wow, thank you!
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Stu, you are the most comprehensive resource for boat maintenance on the internet. I've been going back through some of your older videos to familiarize myself for a 17' project boat that I am in the middle of. Also, I like to comment because I know it helps your channel's statistics. I'm still following your new stuff too. Keep on digging, you've got Renko looking good.
Thanks mate. :)
Such a scruffy guy... such amazing explanations :) . Thanks so much! From experience, most mechanics I've used just go with the "close enough" approach when tuning rather than actually going with the actual tolerances set by the manufacturer. This is how to do the job properly.
Wow first time I’ve heard this explained “in English” lol
Thanks mate, glad it made sense. :)
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Excellent video. Just like all your other videos fantastically easy to comprehend. Keep up the great work & sincere thanks for taking the time to educate all us enthusiasts.
Thanks mate, you're most welcome.
I have learned so much from your teaching and I shop at Marine Engine.com because they sponsor your channel. This has to be one of your very best presentations. Clear, sequential and understandable, even for me! You have a gift brother!!!
These videos are genius for us hobbyists out there. I spent a couple years in a technical/trade school learning my trade, and your teaching skills are definitely on level with a great trade school! Your videos all seem to have you begging for forgiveness when things go differently than planned, which, I think is usually the most instructive part of the topic. If it worked perfect every time, we'd all no you edited too much out.
Super lucky I found this channel, been reading different web forums to try to understand and none really wraps it up like you do and still gets into the necessary specifics, really appreciate the time you into this!
Is this a unique design that Tohatsu uses or is this the majority of 2 strokes? I remember you said they have different designs. Would a 2000 merc 50 2 stroke be the same type of design? I don't have a problem now but am very interested after seeing the vid. I love understanding outboards and learning from you!! I grew up fishing my whole life but we were to poor to own a boat. I always watched boats go buy while i was fishing off the banks. So I've never been shown even the basics. Now that im grown up and have one I appreciate the hell outta of em and want to know how to fix it myself. Ive gained a lot of knowledge from you and can't thank you enough!!
Hi Jimbo, by 2000 you might find your Merc is completely computer controlled and can't be adjusted. The computer will adjust the timing to be optimal for all conditions. I didn't get my first boat until I was about 30 but now I love them. Glad the videos are helping you with your boat! :)
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Enjoyed. Easy outs become hard outs when broken. One method of removal is to build up the broken bolt with TIG until there is enough material to put a nut on then weld the nut to the build up.
They sure do. Yes, I've tried the 'welding a nut on' technique before. I'm planning to do a full video on stuck and corroded parts soon.
Terrific tutorial Stu. Rather embarrassed to say I had no idea exactly why timing advanced or when. I just new it did. Thanks for clearing that up!
Also, your reference to the speed of combustion and the flame front moving down the cylinder reminded me of the many misconceptions about fuel octane out there and its effect on combustion. Another vid idea for ya!
Glad the video helped you. None of us are ever too old to learn new things. Yes, there is a lot of misconception about octane, will add that to the list.
It’s great to see that there is 18 people who don’t understand nail clippings Christ how easy is the example have to be as always great video stu happy new year to you and your family
Happy New Year!
Love all your videos. So much information
Thanks so much!
Great explanation of ignition timing and how to adjust it. 10/10. Thanks.
New to boats and stumbled across your vids. I subscribed straight away due to how thoroughly you explain the situations. Your camera angles are mint as well. It's a finely polished presentation. Tip top. Going over the donk using your vids to give me confidence out on the water. Thanks heaps.
Thanks mate, glad you are enjoying the vids and they are helping you with your outboard. Good luck with it! :)
To add to the broken bolt talk, I ran into a few in my days of working on auto repair jobs and I found that if I mixed half transmission fluid and half acetone it would free up any rusted or corroded bolt or nut, give it a try, you can see it creep up the treads.
Yes, that particular combination does seem to work well, good for unseizing pistons too. It will definitely get mention when I finally get around to the video on corroded parts!
I will be waiting for your presentation of the Reeves method. love your videos, your explanations are impeccable. I just got a 77 75hp evinrude and believe I got a timing issue, scared to run it and mess with it until I do a link n sync with it and at least check the timing is close. again thanks for all your videos and will be awaiting the Reeves method.
Thanks Miles, will try to find a suitable outboard for that video soon.
Dangar Marine u r da man
Thanks for your videos. You are a great teacher. I know it’s dangerous but can I use propane to check for a vacuum leak. Thanks
Yes, I often use propane to find vacuum leaks.
Absolutely brilliant, Stu. Really enjoyed your presentation. I've had many highly educated university professors who couldn't come close to your ability to make the complex simple.
All good very informative video. But before attempting this make sure the carburetor is clean and the mixture is correct or you'll have wasted you time and possible made the engine run worse.
Thank you for showing and explaining the timing marks on these engines. I have a factory manual for a NS70A2 and it shows the linkage adjustment and the ignition timing but doesn't even mention where the timing marks are let alone what the marks mean. You saved me a bunch of time.
You welcome, glad the video helped.
That was a sensational video Stu. Thank-you so much. I have a reasonable understanding of outboards, though was never game enough to look too deeply into adjusting the timing. I now get it. Would you believe I have a Tohatsu 90, so I am off to the shed now to check it out! You are a knowledgeable man, and I appreciate you sharing your wealth of knowledge. You not only know stuff, you also know how to teach. Well done, and thank-you again for your Channel.
Thanks Stephen, glad you enjoyed the vid. Good luck with the Tohatsu! :)
Hi Stu
You know that the only difference between this and the 140 hp is the throttle cam on the top carb and changing the stoppers. Can be changed in 5 min, with a plier and a wrench.
Thanks for vid
I am so glad that I finally understood what's going on here ! Being an idiot in electric field, I had to stop at first, then I watched quite a few videos in fundamentals in ignition and timing, before I came back again !!!
Thanks , Stu !!
You're welcome mate, glad to hear the video helped you. :)
I've been having trouble with my old 115HP yammie. I just checked the timing linkage after watching your video and it's completely disconnected! One of the plastic boots is broken. That could explain the problems. Going to fix it just now and see what happens. Thanks for the great video.
Good luck with it. Disconnected timing linkages are never a good thing!
It's working good now. Surprised it was running at all without that linkage. There was a wire running from the throttle arm to the coil that was doing the job of the linkage, not very well
Where would you go to buy the little plastic widget that goes on the end of the link rod? I just got a quote from my local Yamaha dealer and it's $14.65!! Could I find the same thing in an auto parts store? Thanks
Sok köszönet ezért a videóért.Azonkívül,hogy lényegre törő,tökéletes a magyarázathoz kapcsolt képi mutatás.Sokat tanultam ebből a videóból.Köszönöm.
Nice I would like to see the same video for setting my mercury 650 3cyl thunderbolt year 1976
Hello. The flywheel ignition coil shows 531 ohm resistance, is this normal or not? tohatsu m90a engine. the remaining two coils under the flywheel give out 2 ohm resistance. Thanks for understanding
You'd have to find the PDF service manual online, the specs will be in there.
@@DangarMarine I searched and found me. There is a wiring diagram in the native manual, but there are no numbers on it
@@DangarMarine could you take a measurement on your ignition coil, what resistance value will the device show for you?
lol the world of hurt part, felt that 100 percent.. 2 bolts on the head of my force 50hp 1998. I had to cut the head off and then collapse the rest of the bolt in.
This was a great video to watch. I believe the reason you was having the issues With it being 5° retarded. Instead of 10° Could possibly be The manufacturer's specifications. Because they are sometimes put together on an assembly line. The very changes But you made the best you could do with the throttle linkage. Great job. And to make this planning simple as sometimes. The factory specifications are wrong. For they don't match up with your Linkage.
Thanks, that was really helpful! I think this is possibly one of the most useful outboard videos on youtube.
Thanks mate, glad the video helped you. :)
Please Help. I have an 1989 Johnson 70HP rebuild by Coastline Marine in Florida. The rebuild cost $3180. (rebuild include: bore the 2 bottom cylinders to the next larger size piston. replace the top piston for cylinder 1, rebuild carbs, new thermostat). The guy told me to check the ignition and timing by a mechanic. I have called every marina in Boston area to have them check the timing for me but no one is willing to work on older motor so I have to check the ignition/timing myself. I have watched TH-cam videos bought 2 manuals to do the timing/ignition myself. When I check the TDC of the motor, new TDC mark that I've found is 2.5" to the left of the factory TDC. Is this correct ? TDC needs to be correct before I can continue forward. Thanks for your help.
Thank you for all your help , could you make a video or give all settings on a DT85 SUZUKI OIL INJECTION 1985 MODEL , LINKAGE SIZES AND TIMING SETTING
Great lesson. You have the Green Machine, my project is the Invader. 1985 75 hp Mercury 2 stroke, so far I’ve gone through the carbs and fuel pump, timing is next. It would be timely if you did a video on the timing of Mercuries. Best regards from Lynden, Washington. U.S.A.
Yes, should do a merc timing video one day as they are quite unique.
I am new to ouboards. This is so similar to my 90 hp Johnson that I recognized the problem I have. You are a great teacher. Thanks,
Excellent teacher you are. I have a 2 stroke Yamaha 25 hp with 2 carbs 2008. I bought it new. At idle speed I couldn't get the pop out of it. After watching you on utube I adjusted the carbs in sync, and replaced lower unit leaking seals. Also with your instructions I got the pull rope working on a 9.8 Merc., and if I would have used your water pump drill test I wouldn't have changed the water pump. It was fine. The engine has a warped aluminum plate ,and 2 bad gaskets on the power head which turns the water to steam. I cleared the copper tube, and the rubber lines to the pisser. Parts are on order. Hope to have the motor running next week. Low,low hours on this motor which is worth fixing.
Sounds like you've done a great job on getting that motor fixed up mate. :)
Thank you for taking the time to explain this! God bless
You are so welcome!
All of your videos are excellent. I have a 1988 70 hp mercury and have done a lot of my own work. Too bad you aren't in the Land of Pleasant Living (Maryland Chesapeake Bay)
Thanks mate, good to hear you are doing a lot of your own work on the motor. I'd love to go boating on Chesapeake Bay on day!
You have a standing invite to join me on my 1989 Boston Whaler 17' Montauk.
And for the new 4 stroke motors, you must use a timing light.
And what I don't like is they don't have physical marks. They only put a sticker on the top of Most fly wheel with the timing marks. I wish they would engrave them in the file.
Good job on this and all your videos. When I read my Yamaha Outboard's Service manual, then with work I can sometimes figure out what I am supposed to do, but your videos give me much more depth about how I do it and more importantly your videos tell me why I am supposed to do it. You are doing a great job of sharing information. Thank you!
Cool, thanks!
I have a similar problem with an ‘88 110 Johnson but can’t figure it out. The timing sets while running using a light and I can’t get it to idle correctly. When I engage the transmission it dies, so I know the timing is not right. But this motor may be missing some stops. I’m just not sure because my book doesn’t have the specific model I have and the procedures are different I guess. Any help?
This helped me a lot however, My boat has a 70hp johnson and it has no power in the water under a load. I checked the operation of the linkage and the timing rod is not moving with the throttle linkage at all. I have adjuste the throttle to be centered for forward and reverse but now i cant get the timing rod to even move. I can't see how the lever on the throttle bracket ia even making the timing rod move, it is hitting no where. How do i get it back operational
Good stuff. Explaining the theory is very informative. And walking through the adjustment is extremely helpful.
Glad it was helpful!
I had some problems with my Yamaha 55 and I watched all your videos and must tell you that I have learned a lot.... Thanks for all your help. Now I need to find manuals for my outboard.
You're welcome mate, glad the videos have been helping you. :)
Any experience with johnson OIS timing? I have 05 90hp optical sensor went bad ,replaced and seems out of time. Not much literature out there!! THANKS
Hello, I got a mercury 3 cyl 60hp from 1987 and was wondering where can I get a repair manual for it, on google found emanualonline, seloc, clymer and tradebit as pages to buy a manual for said engine but I never bought a online manual so was wondering if you could give me a bit of help with it, only manual i ever bought was for a vauxvall nova via ebay and was made from haynes (book), cheers.
The stator of the engine broke and the distributor had the 4 cables in bad shape wich I fixed the second and about to buy new stator but its been many years since I last heard the engine running and may be a bit out of sync because when removing the distributor to fix the cables had to unscrew the part that connects it to the linkage of the throttle so Im looking for a manual to be sure everything is how should be.
I'm having an issue and can't find a manual for my book about timing it's a 1989-90 HP etlf all the manual companies keep sending me a 1988 90 HP ETF manual and and the linkage measurements arent the same. 😫I went to do a link and sync and followed the manual and I went from a to b and when I got to c which is the top link next to the flywheel and stator it said to make it 74 mm and there's not 74 mm of linkage there it will barely go to 64 mm. So now I know this is not the right manual and when you look it up on Google every and any website is offering this manual for my 90 etlf made in 1989 and this book is not the correct one. I now have my linkages all messed up can't find an idle speed or full throttle speed because this book can't be the right book so I'm afraid to follow that. And I can't go off of linkage measurements because I've already seen this book is not the one being that c link doesn't even go as long as the service manual calls for. I know this is an unmolested engine so the linkage is not something different or has been replaced please help me I can post a video on my page showing you everything so you can just comment and react or I can video chat with you on whatever platform you desire or we can start out over email I'm trying to get this finished before 4th of July my family would love to see the fireworks on Hartwell lake and I don't want to mess my engine up running it with the idle speed and the full throttle speed all out of spec and neither of the stoppers in the right place. I see that you're more mechanically inclined with outboards than anybody on TH-cam or the entire internet so I figured you knew exactly what idle degree and full throttle degree settings that I should set it with my timing light so I wouldn't have to worry about measuring linkages or if you knew where to get the right manual or if you no at least where I need to start or maybe what I need to do it's like the manual for my motor doesn't exist and all of the companies keep offering the same one for my year model your videos save me a lot I don't know what I would do without your channel please help me out I need to at least get the boat on the water before the summer ends if not then before 4th of July. it runs like a top it just had a rough idle so that's why I was doing a link and sink and I wanted to make sure that my carburetors were opening at full throttle with my full advance linkage on the timing end of things and that's the reason why I was messing with all of this other than that she runs like a dream but I'm not sure now that I've done messed up all the linkages again please help thanks man!
Really brilliant video thank you. It was five years ago so no idea if I will get a reply but I was going ask a question. My Yamaha 90A manual talks about going on to check the timing while running with a light - fine - but it talks about using a test prop presumably so that the motor is under a known load - is that really needed?
An observation: the timing linkage socket was above the ball instead of on it, maybe this was part of the problem, IE causing binding.
Also, I worked on an old 1977 140HP Evinrude V4 where the tubing over the timing stator wires had hardened and cracked. This was preventing proper movement of the stator and was flexing the wires all in one spot stressing and breaking them. Some new wire soldered in and new heat shrink tubing fixed it right up.
Well spotted on the linkage. This outboard has a lean misfire so I'm going to be going through the carbs soon and then we'll know the true situation with the timing. Good point about those wires. Any time something moves regularly like these timing adjustments there is always the chance of fatigue cracks.
I'm sure I've saved thousands watching your vids.. Bloody awesome.. Caloundra 👍
Broken screw removal specialist here........Used to be a fitter/machinist attached to a mob of sparkies who were awesome at breaking screws off in housings then breaking drills or ezy-outs inside them....
+Matthew Moses Could have used your company that day Matthew!
Dangar Marine how do I fix my 96 Johnson 2 stroke outboard electric start but I will not game losing
Got a question I have a 1989 Evinrude xp 150. With the silencer cover on it. I can see flashes of fire up in the carbs. Would that be a sign of reeds problems.
Why not run a little more neg timing and use high octane fuel as done with auto performance timing? There’s got to be some more power on the table based on a conservative OE timing spec and the higher rpm/timing achievable by definition.
Not exactly... Different Octane fuels burn at different rates... Otherwise a Great Explanation... AND then we get into VRT or VCT engines...!
Thanks for your articulate & intelligent presentation on timing an outboard. My engine is a 1967 Merc 500. Timing-belt's-metal-container-cap-"cap-screw" dislodged during a voyage. The belt came off the distributor shaft pulley. Ergo, my timing must be re acquired.
Thanks Rich, this video is more ignition timing but it sounds you will definitely need to get your cam and crank lined up again to put a new timing belt on. Good luck with getting it done and getting back out on the water!
It has to do with a specified tiny the screw came off after mechanic adjustment and I put in a screw with a washer but was probably not time corrected because the screw fell off after timing it from the Boat Shop was put back on by me Maybe not correct so do you think this could have caused the Piston lowering to crack in Fallout thank you very much
Great detailed explanation and video of outboard timing, I could not have completed setting the timing successfully on my Merc 150 without your help.
One note, not timing related: While you cannot drill out an easy-out (or broken drill bit) for the times when you cannot get to the back of the stud, you can grind the easy-out away with ease using a 1/8 th inch Dremel grindstone.
Glad the video helped Pat and good tip!
Hi Stu, While waiting on my merc service manual tried the timing light with it running to see if adjusting the idle timing helped it run better. interesting thing is turning it in or out didn't change anything. If you turn the upper timing arm to the left it makes contact with structure, to the right no problem? weird moving the idle screw doesn't change the timing or RPM? On a car if you move the distributor it makes a huge difference. goo.gl/photos/vvUoQBK2e75qKt8q6
Timing on these older motors is a tricky one. I'll have to find an older motor to do this type of setup on, but as you say, having the service manual is pretty much essential. It's a shame it isn't something that can be done in the workshop like on this Tohatsu as hanging off the back out on the water in broad daylight makes this type of measurement and adjustment very, very tricky, not to mention a bit unsafe.
This was extremely helpful in making me understand the timing setup on my Nissan NS70B outboard. You are a great teacher! Thank you.
Hey stu, thinking you could do a video on broken fasteners one day- all the options...Had a 15hp Yamaha with 2 snapped Thermo bolts recently. Nightmare.. took 3 hours. Cheers!
Definitely planning to do that video very soon!
Hey I'm having issues finding what my timing should be on my 1989 175hp mariner outboard what should it be or how can I find out
So anything past the triangle towards the left in the video will make the spark plugs fire before the piston reaches TDC? If so does this make it run in reverse? I may have missed you explaining this in the video.
Hi mate, good question. I should have gone into the affects of timing more, maybe that would make a good follow up video. The motor always turns in the same direction. When the motor is running faster, the spark fires before TDC, but the momentum of the motor keeps the piston travelling up as the explosion is still weak in its early stages. As the piston reaches TDC the pressure is getting stronger and pushes it back down with more force (in the correct direction), peaking at 20 after TDC. If the spark fires too late, the pressure chases the piston down the bore as it travels after TDC and doesn't add much power. If the spark first too early - the timing is too advanced before TDC it can reach a strong enough pressure before the piston reaches TDC and try to push it backwards. This will cause knocking and is bad.
Glad there was no commercials - it allowed for better concentration.
Hey friend, I need your help. How do I synchronize the carburetor on a Tohatsu M40D2? Thank you!
Great video, Stu. Listen, I’ve got a 25hp 2-stroke 3cyl Evinrude that has me pulling my hair out. Idles great in neutral and in gear but if I give ‘er I get about 10% more power and then it just holds and flutters (but doesn’t stall). If I go back down to idle all is well again. I’m going to re-do idle timing adjustment as this is what Evinrude wants me to do next. Would resetting idle timing in itself help me at higher RPM’s you think?
hi got a bit of a knock pre ignition on a mariner 40 6e9. ive set the timing and cabs etc cant seem to eliminate it, any thoughts would be appreciated thanks
Thanks Mate, you have a good knack at explaining the procedure, as well as engaging who's watching, as well as making it simplistic, well done
You're welcome Craig, glad you enjoyed.
Another great video Stu!
Thanks Will!
Is there a way to grease the bracket from underneath The bracket on my outboard for some reason is sticking Or do I have to disassemble it all and clean it
Iam have trouble with my 140 hp nissan out was wondering if you have any tips that could help
What the great explanation of timing adjustment.
I assume that on simpler older engines with mechanical linkages the advance is kind of fixed by the shape of the the curved ignition plate and the roller riding between marks for the limits of advance and connected to the throttle arm for rpms adjustment. Since the connecting rods are often bent heavy wires this by itself easy the adjustment of the rest of the low and high rpms
what do you mean the rods are "often bent"??
I needed this one last year ;) Great video as always. I look forward to them each week.
Thanks Seth, glad you're still enjoying the vids. :)
Do you have a video on how to synchronize and set timing for 1991 Johnson 225?
Again, great video with a lot of information.
Did I see in some recent video your 20/25hp yamaha laying down in your backyard?
I have one question about that. On my 20hp autolube the throttle plates doesnt open 100%. They open about 85% and it seems to be limitted by the throttle cam. The cam is shaped so that last few cm movement of the remote conttol does basically nothing. Otherwise the adjustments are fine, thanks to you. Could it be possible to get your opinion for the issue?
LOL you need to do a overhaul on your chalkboard! way to much piston to cylinder clearance
Could use a bit of work. ;)
Cracking video mate thanks alot👍
Thank you for all your videos Dangar. You are my therapist, your videos have a very therapeutic effect on me. LOL :P
And im learning a fair bit about my new hobby wich is boating. :D
Glad to be of service. Always love to hear of new people getting into boating. :)
You don't remove the damper... the bolt is only tight with locknut.
Hey Stu.
How good are the later 2001 Tldi outboards?
I have a 75 hp 2006 2 stroke Merc But am thinking about moving to Tldi.
I know parts are expensive but excluding that, what do you think of the Tohatsu outboards?
Paul, my mate that has been in a couple of videos has one of those and it seems like a great outboard. I think Tohatsus are generally pretty good.
Can you please give me timing setting for a nissan ns70a2 I cannot find it anywhere.
Where do you get your manuals from? I’ve got one but doesn’t show ( or I can’t find) the specifications for the throttle stops and such... I found the tdc atdc and btdc settings but can’t find the throttle stop settings... mine is a 78 115hp Evinrude...
I use both readmanual.com and tradebit.com
I was hoping you could help me I have a 115 horsepower Merc 1990 2+2 I have good spark on three coils jumps a 7/16 Gap but one will not unless it is running is there a problem with that one why it won't jump the same gaps as the other three
It does sounds like that coil or HT lead is bad. You'll get a higher current when the motor is spinning at speed which is why it can jump the gap when it is running, but you might want to think about swapping it out before too much longer.
Excellent Video! Very Helpful! Great Job Teacher!
Glad it was helpful!
I just let you no what my problem is when I have the outboard motor go hp 90A forward throttle my Tecmetering dial starts dropping the raves but no sound different on the the motor I’ve had good look around the controls as well as the outboard all is well would be very gratefully if you would have any advice on this problem the I’m having stu
Kind regards !!
This can be caused by a failing regulator / rectifier.
Great video Stu have you ever worked on a Yamaha 40hp twin 2stroke BR 40 676s model and approx 1978 think they had the mariner badge in some as I would like some info and timing set up as I can't find a service manual
I've watch a few of your videos and they are very good and informative
Many thank.
Stewart
Hi Stewart. No, I haven't worked on one of those. As outboards around here get used daily in salt water they rarely last more than 20 years at the very most so we don't see any old outboards at all. Have you tried sites like tradebit and readmanual.com to see if they have any PDF service manuals available?
Dangar Marine
Thanks very much for the quick reply and info 😀 I watched your videos from 12:30am until 05:45 and what a fantastic job you've done keep up the great work 👍🏻👍🏻👍🏻👍🏻
Thanks Stewart. Time for you to get some sleep! :)
Oh well , I have a Johnson 40hp,.I'll have you look at the other videos too.
the only thing I was wondering is did you test idle speed submerged or just on muffs cause I know from my experience with outboards is that they idle faster on muffs do to the fact that there is no back pressure in exhaust system and most of the time the recommend idle speed is actually for when the boat is in water so submerged that may be why your idle was a little high
You're dead right about the idle. We took the boat out on the water to do some fine tuning as, yes, it should always be done on the water with the boat up to operating temperature as per this video th-cam.com/video/bsHCMJnRY9A/w-d-xo.html
Dangar Marine
FABULOUS video! Question; I have a NS90A, have cleaned the carbs and idle is fine but it will not open up all the way. It gets to a point that it wants to open up then slows and speeds just between 2800 and 3000. I am new at this and really want to get it set to run with carbs open. Can you help with any information?
Clear and concise. Excellent video.
I’ve been trying to actually understand this for weeks. Endless watching and reading. After this I now get it. Thank you so much.
I have a 1986 Johnson 50hp. I was wondering if you knew what the WOT degree setting should be as well as idle timing degree setting. Idles pretty good, WOT seems a tad off. I just dont want to burn a piston if its too far advanced.
Outstanding presentation. I'm sure you have helped many a backyard mechanic to understand how EXACTLY to set timing on a Tohatsu. I have a Tohatsu M60B and will apply this lesson today. Thank you.
How can I set the wot timing on an 89. 48. Without a test wheel. Or at speed?
I must say, I wish you were my next door neighbor, or worked at the shop down the street, I'm just not to trusting in an average person working on my boat...
Is there anything that could cause timing to be... "inconsistent"? My outboard will run full throttle but every 3-4 minutes it'll bog right down, and seemingly backfire. Honestly it seems like one of the cylinders stops firing - and then it'll perk right back up again.
It probably is one of the cylinders losing spark and then firing again and igniting the unburnt fuel.
thanks! yea I replaced the spark plugs and thus far I've had the most reliable performance yet. I couldn't help but notice that the plugs I pulled "looked fine" but were a bit gummy. - the following gets difficult to describe:
The motor sounds quite scrubby and loud if you will, and - I even pulled out my stethescope for this, I'm almost certain its the piston rings. What confirms this is that when I run the motor in a tub I get a significant residue of oil in the water. It resembles more like grease however than motor oil.
So - I have ordered a new drive shaft seal to at least rule out that I'm not also leaking gear oil.
But... I"ve noticed an exhaust port above the waterline, and it too leaks oil much to the same consistency.
I'm not too sure how to really diagnose this. I had thought that the exhaust came out from behind the prop, but I definitely have a port (perhaps for low rpm's?) just below the motorhead, and it has a stream of oil. I'm guessing this is from oil passing behind the piston rings (although this is a 2 stroke?) Or I have two problems and am also leaking gear oil ontop of a whole host of issues.
Sorry I know that's a whole lot to digest. I tried to explain it simply but... haha this is far from a simple problem. Either way, thanks very much for your videos Stu! And again greetings from Squamish Canada!
Very interesting and helpful. Thanks mate.
The point TD1 is it written or printed in there to be identified, i have yamaha 75
Good vid again. Thanks i have a marina 40 2 stroke two spark plugs. Wont start i replaced engine but it back fire only wont start, help please
Sounds like either timing or spark plug leads are going to the wrong cylinders.
Cannot wait to see the Joe Reeve's timing video you talk about, wish it was available now.
Yes, really must get around to doing that soon!
Well explained Stu as always..those rubber caps on the stoppers is something I haven't seen. (sips on Peroni )
Aww, I was trying to hide that Peroni... ;)