Mercury Outboard Water Jacket Fail Solved!!!
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- เผยแพร่เมื่อ 6 ต.ค. 2024
- Made every effort to get the passages clear so the engine could cool properly. All attempts for solid water jacket flow Failed. Surgery got moved onto the docket...... Here are the results.
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This video was extremely helpful for me to find and fix the exact same problem on a 45. A couple of pieces of the old broken water pump impeller was stuck inside the exact same port as your 50 hp. Thank you for showing me this before I pulled the power head. Great video!
You're welcome. Son
Definitely a helpful video, mine was in a different place but same basic issue
Thank you for your video, I am about to tackle the same issue on an old 350 Mercury outboard. I find frozen bolts in alloy castings can be shocked with a drift punch or a Philip screwdriver to help the penetrating oil to work. Best penetrant is Kroil, thanks again.
Very nicely done! Rule of thumb...if the dirt dobber don't fill it... it's gotta be internal.
I had the same problem on my 88 classic fifty except for the piece was in the water jacket underneath the power head between the exhaust plate where the water enters
Hi Son, I'm having some issues with my 1970 Mercury 500 Thunderbolt.
It only runs on the top two cylinders but the lower cylinder doesn't fire. When started cold it starts really easy and idles well but as the pressure in the coolingsystem increase the lower two cylinder stops firing. I have good compression on all four cylinders, I've rebuilt the cars, I've checked the ignition. Good spark on all plugs and so on.
I got a tip that this model could suck water backwards into the combustionchamber if the waterjacket fails, I just removed the waterjacket and the gaskets looks like s#!t but I can't see any obvious leaks. the passages between the cooling channels or whatever it is are all corroded and ugly but I can't see any holes. The inside of the middle cover and the cylinder were covered in this grey goo (exhaust gases mixed with water?)
What would you do next?
Boat in water for a quick test-run (excuse my mothers loud voice, the horrible quality and my mothers even worse recording-technique.
th-cam.com/video/bhKVxvvdbM4/w-d-xo.html
Idling warmed up (water leaking from a broken plastic fitting)
th-cam.com/video/xexh7dVQC70/w-d-xo.html
Appreciate all the help I get, best regards!
Watching brotha hope to learn a lil
Great video, I’m having a similar problem with my 1977 50hp. Is there a way to drop the lower shroud to avoid having to pull the power head? I don’t have an engine hoist to be able to lift the head
Unfortunately, no.
Did you get back running? That fix it? Thanks for video-
Yes sir!
What kind of sealant do you use on the gasket?.
Thank you for your help! Question, can you remove the cylinder head/water jacket without pulling the power head?
I have the same issue with our 67' 50 HP. I Cannot get the clean out plug out from the top of cylinder head, (seized up, tried heating) that's the only thing I have not been able to do, as far as flushing. I noticed you had installed a nipple you yours, etc..
You can. You would have to loosen the lower shroud. It will be difficult. I would definitely replace all the screws and bolts. They are very "soft" so proceed with caution. Son
@@MerCSonL6 Will do, thought I would try to that first, if the bolts will free up.
Just does look like there is much room to back out the bottom bolts. Hopefully the shroud will slide back enough.
What are your thoughts on the flush plug? Would you suggest trying to remove the top flush plug, before attempting the above?
I can drill out/easy out if necessary?
Do you have a link for new gasket replacement parts? Thanks Son!
@@rollmeaway5075 its certainly worth a try. I'm not 100% sure it would cool properly tho. The gaskets would likely have to be purchased from Oldmercs.com. The 50hp is the only L4 that didn't change a whole lot from the late 60's all the way to the 80's. It is highly likely that any "classic 50" gasket will work. Double check it but I'm pretty sure that's right. Son
@@MerCSonL6 I'll see what happens, thanks again.
I see a ham radio tower in back man I'm a ham operator km6sze
Could you point me in the direct of the gaskets for a 1969 Merc 1000? I’m having similar issues and need to remove the exhaust baffle and most likely the heads to the cylinders to find what’s creating the blockage. Wanna try and knock it out in a day when I rent a hoist, thanks!
Marineengine.com or oldmercs.com
Son
One question that cover from the cylinder head does it has a hole I just noticed a hole on mine and water is coming out from it
Might be for a psi pressure guage but I do not believe the silver blocks had those....
You could have just drilled a couple of holes in the lower cowling to access the bolts then plugged then with rubber grommets. I have done it SEVERAL times....and is what the manufacturer should have done but they are not thinking of you, they were thinking of their dealers repair shop making money.
You haven't addressed the thermostat ???
There were no thermostats on silver blocks. Son
That plastic hose fitting on the top of the exhaust baffle. What does that connect to mines capped and the bottom water fitting is capped as well, should they connect together?
Mines an 800 previous owner capped them. My tall tale stream is really hot
I also noticed water on my spark plugs it seams like water is coming out of the lower carb as well. 1973 50hp mercury. Water pump came apart . Do you think I have the same problem
Water on plugs is definitive of an exhaust Baffle leak. Son
@@MerCSonL6 ok thanks waiting on parts .would you know the torque specs and sequence for the baffle cover and front cover
@@MerCSonL6 what could I use to clean the inside of the power head
@@jeremiahgonzalez6563 heavy duty degreeser and elbow grease. Son
1983 115 tower of power wont plane out without someone on the front of the boat ive replaced stator trigger both power packs any ideas
What's the weight of your boat?
It ran fine when i got it started having the no plaining trouble been chasing the demon since
When i got it it would run 55 with two people in the boats its ranger 335v
I have an 86 115, and I just changed the impeller and now my tell tale stream isn’t steady now. It will start off at a full stream, then somewhat sputter after a minute. Think something could be blocking the line?
For sure. I would pull the hose and verify it's clear and verify the nipple at the outlet is also. Son
MerCSon L6 any trick to removing the water tube? Mine will not come out
MerCSon L6 disregard that comment. I finally got it to come out, it was just being stubborn. Thank you for the help sir!
Hi I have a mercury 75 2 stroke 4 cylinder its been running fine until recently I've noticed that there's cooling water getting into the bottom cylinder any ideas what may cause this? Thanks and love these videos on older outboards
It's likely coming through the exhaust Baffle. You will have to lift the power head to remove exhaust cover and inspect the Baffle very closely. A pin whole can cause the water intrusion. Son
Do you have the torquing specs for the exhaust baffle and cylinder head cover for a 1000ss (1969)? Thanks!
can you take it out the powerhead without the lowerunit? o you need to take it out the lower unit first?
You can leave the lower unit attached and still remove the powerhead. Either way works. Son
@@MerCSonL6 thank you very much, I need to revive my engine, it's running, but it shuts down when I put it forward on the water, leak some fuel in the top carburator,
I think it's because of the floats, beacuse with flushhose it does not happen
@@MerCSonL6 I see a little water in the spark plug of the last piston, it is milky and blue, can be a waterjacket problem?
@@juajo55 probably an Exhaust Baffle leak.... it only takes a pinhole to pull water in. Son
@@MerCSonL6 what part i need for replace that?
Do u have a 35 lower unit for sale for a merc ready to pop on I'm looking for one
Unfortunately, I do not. I think the lowest I have is for a 650. Son
@@MerCSonL6 ok thanks for response back 👍
Mine is leaking at top spark plug. Is this my problem too you think??
Its definitely a problem. A leaking spark plug has no effect on failing water jacket unless its dumping water.... in that case it would ground out the plugs and your engine wouldn't run. Let me know. Son