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  1. V

    Crank Case Pressure?

    I have a remanned 7.4 MPI long block. It was originally a 1999 Mercruiser replaced by a Jasper long block. Last weekend I did an oil change at the Jasper mandated 10 hour mark. I noticed during the process that the oil was down a quart or two. I can't say for sure how much was originally put...
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    Mercruiser 7.4 MPI compression question

    Hello, I am considering a new to me boat. I know just enough to be dangerous and did a compression test with a friend who knows a little more. The numbers have me confused. After searching a bit I think we made some mistakes that may or may not explain the numbers. It is a 1999 Mercruiser...
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    5.7 Mercruiser water in cylinders

    I got the dreaded call from the marina this morning. When they were doing my tune up they found water in the cylinders. The engine is a 5.7L Mercruiser with an Alpha I. It is on a 22' 1994 Celebrity. They said they weren't sure yet if it was a blown head gasket or a cracked exhaust manifold...
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