I was just told by my mechanic that I need a new motor in my 1989 Malibu Sunsetter. He told me that even though the compression is ok at 140 to 145 the motor failed the "blow by test" at 60%. I guess it should be 10% max. Anyways what should a new "Merc Cruiser" motor cost, and what should a rebuilt motor cost? I would appreciate any suggestions on possible modifications I should have done to the motor or if anyone knows where a good place is to buy a good new or rebuilt?
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