400SS engine room leak


F

Fossil Fuel

Member
I have a small amount of water in my bilge that I cant find the source. My trim pumps a getting a splash from time to time as well as my vac u flush. Could it be coming from the engine room air intakes? Anyone have the same issue?
Thanks
 
Assuming engine room bilge, and could be many places;
drive bellows
shift cable boot
transom seal
upper steering pin seal
raw water pump or hoses
oil cooler
heat exchanger
exhaust

The most common place is in the transom area. Take your phone and take some pics or vid looking under the motors next to the transom. If it happens only when the motor is running then this can narrow it down.
 
there is a bunch of stuff that drains to the bilge. Could just be rain water or rinsing. I drain my bilge all the time and after a storm there is always water in it...
 
I'll second the suggestion for checking the upper steering pin for leakage, especially it's an older 400ss like mine. Look for a brown line running across the top of the steering bracket behind each engine. Its tough to see, but can be visible when leaning over the engines and using a flashlight. Of course, engines off. It will only leak when the water is up to that point, so it can change depending on how much fuel (weight) is in the boat.
 
If it’s water than check the city water connection above it. When that starts to go it leaks into the bilge and onto the waste system. If you found the source, post it for us.
 
Thanks but it only leaks a little underway. Had a go pro in the engine room. My 382 did the same thing. Faster I went the wetter the bilge. In my 400ss it leaked a bit with the old engines. Now new re power and same small leak. New drives, transom shields, piping and plumbing. Not serious but puzzling. No leak at the dock......
 
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