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Waterwater everywhere

did the procedure to get water

did the procedure to get water out of oil...haven't tried to find out where water was getting into oil pan yet.....just finished compression test.all cylinders over 150 except #3...it was 90...put wd40 in and retested..it went to 95...i am working on a mercruiser GM 350 260 HP...what do i check first exhaust elbow or head gasket...could both be the problem...really need help....thanks
 
I would lean toward cracked bl

I would lean toward cracked block to get enought water in the crankcase to come out the dipstick tube.
 
i bet you are right Ken...i th

i bet you are right Ken...i think the previous owner abused this boat...i can't afford a dropin but i can get a new block and exaust sys. ...thanks
 
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