So glad that I found your channel, but so sad that I live so freaking far from you(middle Europe) cause I would drive across the state to you to trobleshoot my electric problems on my merc 80 inline 4 Will keep watching and learning from your videos! Thanks for the work and time posting videos!!!
On them mercury 850s can I get a small rundown on what the wires from the harness go to brown yellow grey white black red orange bought a old boat before I tryed to run it was ganna run thought wiring real quick make sure it’s good I’d appreciate the info
Great Vid! thank you. My 1978, 85 HP Merc starts IMMEDIATELY.... but runs horribly rough at idle & and slow speeds... the engine literally shakes. seems good at high speeds. I do have great spark. any tips on where to look next?
@@sicklecell9999 link and Sync is the process of getting your carbs and timing synchronized. Sounds like your engine is struggling to get fuel at low speeds. Have you rebuilt your carbs? Timed your engine? I'll put a link below to the process on an L6. Son
@@MerCSonL6 Yes I'll rebuild both carbs this week, then check timing. this is the 850 thunderbolt engine. THANK YOU ! ! ! ! will check out your channel and sub!
ive just bought one of these and its been sat in a garage for 6 years im wanting to strip carbs and impeller plus oil in box and look at all wiring for corrosion. what else would you say check before trying to start it
Been learning a lot watching your videos, Thanks for posting. I have a 72' Merc 800, it was running great for the first few pulls in the lake, but now I'm not getting full RPMs under load, and only going half the speed I was before at WOT. Any suggestions where to start? I've checked the fuel lines and new filter, brand new gas, plugs looked ok, and it doesn't sound like it's missing.
@@MerCSonL6 I'm getting spark, I thought I fixed it. Rev's up fine with no load. But when it's in the water I'm only getting about 3400 RPM on the top 2 cylinders and 2800 RPM on the bottom 2 cylinders. Is the block shot? Can't figure out why bottom cylinders are not firing at the same RPM's. I will take it back and do a compression test later. Do you have any thoughts? Bad distributer/trigger? Also found out the battery is not charging now. Going to test the stator and rectifier after watching your videos.
@@BradleyKang23 that doesn't make sense. Rpms are governened by the the pulses off your stator. How are you separating the the cylinders? Sounds like a bad switchbox or stator. Son
@@MerCSonL6 Yeah, it doesn't make any sense to me either, I used a digital tach on the plug wires. I checked each wire individually. top 2 cylinders had the same reading at idle and wot. bottom 2 where both 600 to 800 lower. all plugs where pretty clean and wet. Gonna check the crankshaft seals too when I get a chance to work on it.
Years. Red is late 60s to early 70s. I believe the Blue bands showed up around 1972ish. Disappeared then returned in 1982. That's if my memory serves me correct. 😅
Well, that doesn't help. You should move out here just to help me out. Just playing 🤣 Can you recommend a place to get replacement parts for it? Places I've spoke with say these parts are not manufactured anymore.
I like your videos I just buy my first boat I come with mercury 85 -850 how do you identify the year the serial number is 3875201 can you help thanks for your time
Follow the Hydraulic hoses to the stern mount trimp pump. On the top corner you'll see a Flathead screw. Be sure your unit is up before you fill it. Son
@@chadmiller008 you can also try advancing the timing 3-5 degrees. That might help. As of now there's not enough fuel of crankcase enertia to keep the prop going under load. Son
So glad that I found your channel, but so sad that I live so freaking far from you(middle Europe) cause I would drive across the state to you to trobleshoot my electric problems on my merc 80 inline 4
Will keep watching and learning from your videos! Thanks for the work and time posting videos!!!
Thank you putting out good repair infor, to make our life easier when encounter sick Mercs.
So true, You never see this on Yamaha or Suzuki, I have a few Mercs, 50hp, 80hp, 90hp left over when Yamy, Suzu fly out of my shop fast.
On them mercury 850s can I get a small rundown on what the wires from the harness go to brown yellow grey white black red orange bought a old boat before I tryed to run it was ganna run thought wiring real quick make sure it’s good I’d appreciate the info
Ri0 Charles. I'll be there with you my friend. Son
Wow... that's the most I've seen out of any inline.
Great Vid! thank you. My 1978, 85 HP Merc starts IMMEDIATELY.... but runs horribly rough at idle & and slow speeds... the engine literally shakes. seems good at high speeds. I do have great spark. any tips on where to look next?
Link and Sync and carb adjustments. Son
@@MerCSonL6 thank you! just not sure what "link and sync" mean.... got a short definition for me? :-)
@@sicklecell9999 link and Sync is the process of getting your carbs and timing synchronized. Sounds like your engine is struggling to get fuel at low speeds. Have you rebuilt your carbs? Timed your engine? I'll put a link below to the process on an L6. Son
th-cam.com/video/OUFXaNgk0Xk/w-d-xo.html
@@MerCSonL6 Yes I'll rebuild both carbs this week, then check timing. this is the 850 thunderbolt engine. THANK YOU ! ! ! ! will check out your channel and sub!
ive just bought one of these and its been sat in a garage for 6 years im wanting to strip carbs and impeller plus oil in box and look at all wiring for corrosion. what else would you say check before trying to start it
Timing. Son
Been learning a lot watching your videos, Thanks for posting. I have a 72' Merc 800, it was running great for the first few pulls in the lake, but now I'm not getting full RPMs under load, and only going half the speed I was before at WOT. Any suggestions where to start? I've checked the fuel lines and new filter, brand new gas, plugs looked ok, and it doesn't sound like it's missing.
Spark test and perhaps a carb rebuild. Son
@@MerCSonL6 I'll start there! Thanks!
@@MerCSonL6 I'm getting spark, I thought I fixed it. Rev's up fine with no load. But when it's in the water I'm only getting about 3400 RPM on the top 2 cylinders and 2800 RPM on the bottom 2 cylinders. Is the block shot? Can't figure out why bottom cylinders are not firing at the same RPM's. I will take it back and do a compression test later. Do you have any thoughts? Bad distributer/trigger? Also found out the battery is not charging now. Going to test the stator and rectifier after watching your videos.
@@BradleyKang23 that doesn't make sense. Rpms are governened by the the pulses off your stator. How are you separating the the cylinders? Sounds like a bad switchbox or stator. Son
@@MerCSonL6 Yeah, it doesn't make any sense to me either, I used a digital tach on the plug wires. I checked each wire individually. top 2 cylinders had the same reading at idle and wot. bottom 2 where both 600 to 800 lower. all plugs where pretty clean and wet. Gonna check the crankshaft seals too when I get a chance to work on it.
What’s the difference between the red and blue version because I have the red version
Years. Red is late 60s to early 70s. I believe the Blue bands showed up around 1972ish. Disappeared then returned in 1982. That's if my memory serves me correct. 😅
I have a 74 that runs fine but is really hard to get started and seems to be getting worse. Any suggestions or tips?
th-cam.com/video/L2E9k5VWdzI/w-d-xo.html
Are you in southern California? I have one of these and know nothing about them.
Opposite. I'm in West Virginia. 25405. Son
Well, that doesn't help. You should move out here just to help me out. Just playing 🤣 Can you recommend a place to get replacement parts for it? Places I've spoke with say these parts are not manufactured anymore.
@@Pacifictheory haha.. what are you looking for?
I have a question about my 1973 merc 200 didn't know if you could help me or not
Probably not.... or Probably so.... but neither will know until you ask. Son
I like your videos I just buy my first boat I come with mercury 85 -850 how do you identify the year the serial number is 3875201 can you help thanks for your time
What color is the cowling/Faceplate. Son
@@MerCSonL6 blue color
How to access and fill the tilt hydraulic fluid chamber on a 1977 crestliner boat with a merc 850 motor.
Follow the Hydraulic hoses to the stern mount trimp pump. On the top corner you'll see a Flathead screw. Be sure your unit is up before you fill it. Son
Every time I put mine in gear it dies
Fuel ratio or mixture could be off. Try turning each idle screw 1/4 turn out. Son
@@MerCSonL6 thank you
@@chadmiller008 you can also try advancing the timing 3-5 degrees. That might help. As of now there's not enough fuel of crankcase enertia to keep the prop going under load. Son