sea water in cylinders

[IS]

I have 20 feet Bayliner with 5.0 L OMC.<br />Now engine won’t start. I found a sea water in all 8 cylinders. After cranking engine without spark plugs trying to push water out the water is still there.<br />Before this engine worked not very good losing RPM.<br />Something wrong with exhaust system? What I think that water sucked back into cylinders due to incorrect exhaust doors operation. or other reasons?

 

[K Hultgre]

Re: sea water in cylinders

Water in all 8 cylinders ! ???<br />I would start looking at the exhaust flappers and the static waterline on the boat.<br />Any chance the boat stalled at high rpms or went from WOT to idle creating a large backwash?

 

[yoced]

Re: sea water in cylinders

Water in all 8 I would look to intake manifold first (after answering Kevin's question), then riser gaskets.

 

[IS]

Re: sea water in cylinders

I found that there are no exhaust flappers at all.<br />Great thanks to dealer that sold me this boat...<br />Guess that the flappers from Mercruiser would fit my OMC.

 

[Blk-n-Blu]

Re: sea water in cylinders

IS, have a look here for more info:<br /> http://www.marinemechanic.com/site/page88.html