Gas pushing out exhaust

[Cool It]

Hello I have a 1999 34 formula pc. Twin 7.4 mpi mercruiser engines when I start the starboard engine I see gas in water I believe coming through exhaust any ideas on what's going on would help ?

 

[Bt Doctur]

a injector staying open or maybe a dead plug

 

[Cool It]

I'm no mechanic but can it be as easy as changing plugs and adding injector cleaner to gas ? Thx

 

[Bondo]

I'm no mechanic but can it be as easy as changing plugs and adding injector cleaner to gas ? Thx

Ayuh,.... Probably not, but just pullin' the plugs, 'n observin' their color is the 1st step in the diagnosis,.....

 

[thumpar]

Are you sure it is gas and not some lube?

 

[Cool It]

Thx but it is gas ... pulled plugs all dry gas cooler good as well next going to pressure test fuel regulator if good then I'll have to have codes checked maybe a sensor Thx for input

 

[Cool It]

Ok well it was not gas it was oil. The oil cooler went replaced and changed oil five times as there was water in oil. That is all good but know as it seems I have another problem boat runs great for about 20-30 min then I start loosing power on starboard same side as oil issue. When I loose power I have to bring throttle down run slow at about 2000 rpms for a bit then I can push it up and runs good again we tested fuel pressure that's all good. Changed plugs caps rotor still happening I'm at a loss ??