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I have a 1987 OMC 3.0 that idles great when cold but after running for 30 min or more it idles rough and i will have a hard time getting her in gear without stalling. This low hour motor for some reason does have a lot of blow-by i have done a compression check and all was great, but have not...
I have a 1987 omc GM 3.0 in my boat that was given to me by a friend. My question is i had about 6 hrs on fresh oil and decided to change it when i could hear my valve train ticking under load. Also had a lot of blow-by, checked compression, all great! The oil i drained looks gray and thin, I...
