I have a 200hp OX66 that has been overheating. I pulled the covers to the water jackets and they look pretty corroded. As a whole, they have about a 1/8" of crud throughout. There are about four dif spots that have close to 1/4" milky hard deposits. Poking around with a flathead and everything seems to come off fairly easy. My question is what’s the BEST way to clean them…wire brush or what? Second question is when I put the new gasket back on, do I put on dry or use a sealant?
Saw this at that, interesting
I have used white vinegar on an older Honda I had. It worked pretty good. I cut down a 55 gal drum and ran it for quite some time with 2 gallons of white vinegar and about 20 gal of water.
It didn’t make it squeaky clean but I bet it removed 75% of it. The motor was neglected for years before I had it. The backflush hole was 100% crusted tight and the guy told me he flushed it after every use.
Hydra-Sports 22 Bay Sport
225 Rude
you NEED to remove the heads, not just the water jackets
there is likely just as much or more corrosion behind the heads as in the water jackets
the gaskets go on dry
Derf where are you located? I would like to come by and take a look if you are close to me. I pulled the boat out for the same reason yesterday. 98 130 Yamaha overheating.
Sea Hunt 202
Yam 150
Thanks Chris V, that was my next question…if I needed to pull heads too.
Loopervet, I’m on James Is.
quote:
Originally posted by chris Vyou NEED to remove the heads, not just the water jackets
there is likely just as much or more corrosion behind the heads as in the water jackets
the gaskets go on drywww.teamcharlestonmarine.com
www.joinrfa.org
The man is right. If corrosion is as bad as you say, no matter how much “vinegar” or any other cleaner you use, you’ll not correct your issue.
quote:Exactly.
Originally posted by chris Vyou NEED to remove the heads, not just the water jackets
there is likely just as much or more corrosion behind the heads as in the water jackets
the gaskets go on drywww.teamcharlestonmarine.com
www.joinrfa.org
After 3 months of troubleshooting, I am happy to report the motor ran great yesterday. Cleaned heads and water passages, new gaskets and torqued everything down to specs.
I have to do the same thing. Wondering if I should do it myself or take it to a shop. I’m just worried of wrenching a bolt off, not about cleaning and putting the heads back on.
Scout 185