[blbstuff]

last year i lost a block a this year im worried its happen again i put in a rebuilt motor last year and worked out all the bugs then on my last run it broke a belt and overheated (oct) i got towed in and put the boat up for the winter drained all the water checked over everything seemed find but yestday i was taken the battery out for a charge and pulled the dipstick and grey milky oil please tell its not what i think

[MikeW]

Pull the exhaust manifolds off and look in the ports. If you see any signs of rust that is the problem. Bottom line, 99% of the time there is water in the oil it is the exhaust manifolds