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    Need some advice on a weird electrical problem

    Howdy all, I have a bizarre electrical problem I'm hoping someone can help me with. The motor is a 1989 5.7 liter Mercruiser built by Mercury Hi-Performance (before they became Mecury Racing). It's a 360 horse EFI motor. Last summer, I pulled it out of my twin IMP, rebuilt it, and dropped it...
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    Cooling system pressure test - do gaskets breath?

    Howdy boys, I have a 1989 Mercruiser 320 EFI sbc, built by Mercury Racing. Last summer I had a local machine shop rebuild it to the point of being a long block. They put the heads on. They're a reputable shop and do lots of boat motors for local marine dealers. The engine sat on the stand for...
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    How to pressure test cooling system

    Greetings all, I have a 1985 Mercruiser MCM 260 (sbc 350). This is a really noob question, but I just can't get a clear picture on how (EXACTLY)to go about pressure testing my cooling system. I have four hoses going to exhaust manifolds (one on top each side, one on bottom each side). I...
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    Water in the oil - should I replace head gasket

    Greetings, I recently bought a 1985 Chapparal with a Mercruiser MCM 260 (Chevy 350). The engine had been recently "rebuilt". It supposedly had about 10 hours on the rebuild. It ran fine, but I noticed steam in the through-hull exhaust. I've got another boat that's a twin-screw 350 with...
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    SeaPro 17 Transom rebuild - weird structure

    Greetings all, I bought a 1991 17' SeaPro center console, with 85 hp outboard. It's not in very good shape and needs a transom, stringers and sole. The transom is rotted as I figured it probably would be. I'm now looking at cutting out the old transom, but I'm perplexed by two bizarre...
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