Thread: water in cylinders

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As I mentioned, I can't see head gaskets or even a bad exhaust manifold or riser doing that. In the whole time I worked in the marine industry I can't remember an engine getting EVERY cylinder wet unless it was ingested down the carb or back through the exhaust. You will usually see two cylinders next to each other go if it is a head gasket, and maybe one side of the engine if a manifold or riser go bad, but I don't see how the entire engine gets soaked.

Lots of questions I would be asking you if I was taking this boat in for service. How long have you had it? How has it been performing up til now? Did this just start on your last outing or have you seen it before? What were you doing when you noticed the problem? How much water are you getting in the cylinders? Does your boat have rubber flappers on the ends of the exhaust pipes and are they in good condition? Is your exhaust modified in any way, ie, do you have risers that are mounted higher than the waterline? Did you overheat the engine recently? When you shut it off does it run on (diesel)? ( that makes the engine a very effective water pump, in reverse)

Chris Craft had a problem with one model boat where they mounted the engine too low, and it would suck water back into the engine when slowing down. Their fix was to install a spacer under the riser so the water couldn't come back up the hot exhaust. I think you have something like that going on.

Shoot us some pictures of what you have, as many as possible, and I'll try to give you more areas to look at. Your plan to run it on the muffs is a good way to check BTW.

Don