What paint/ Mercury 80 probs.

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Re: What paint

Postby floater » Tue Jun 25, 2019 1:03 pm

Don't despair just yet, i chased this problem for a long time on my motor. I've replaced all of the exhaust covers, pressure tested the assembled block and done lower seals a number of times along with replacing the lower bearing carrier and i still get a clean bottom spark plug. see :-
viewtopic.php?f=7&t=5199&hilit=mercury&start=30 from some years ago.
The motor itself runs well so now i just give it a good dose of fogging oil when i get home and leave it at that. I think with mine its that the boat is quite tail heavy so at rest the motor is low in the water and at tick-over the exhaust pressure is not enough to push the water all the way down the inside of the leg so i end up with splashes coming back up. Your winner also carries the motor quite low so could be the same issue. I think you need to go after the cause of your stalling into gear first, get that sorted then see how it runs and give it a good dose of fogging in the bottom carb and plug after a trip out just to keep safe.
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Re: What paint

Postby haventaclue » Tue Jun 25, 2019 3:29 pm

There is a possibility,there are two seals with the lips facing each other,if the bottom one,to keep water out,is accidentally installed the wrong way :oops:,water will work it's way into the crankcase.The other is to keep the oil in the crankcase.
no matter how bad it is,it can always get worse,I'm an optimist
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Re: What paint

Postby floater » Wed Jun 26, 2019 7:17 pm

haventaclue wrote:There is a possibility,there are two seals with the lips facing each other,if the bottom one,to keep water out,is accidentally installed the wrong way :oops:,water will work it's way into the crankcase.The other is to keep the oil in the crankcase.


This is very true it appears to be a common error that i have also made in the past, when i bought a good used bottom bearing carrier from the US it came with seals incorrectly fitted.
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