Ive got a 77v with the same engine. While getting mine started the first few times I forgot ta turn the water back on to the muffs and burnt up the impeller in the outdrive (it only takes a few seconds). After replacing it I found a small handful behind the water intakes on the outdrive which stopped the water flow COMPLETELY! I also found a bunch of old pieces in the heat exchanger behind the front end cap. One more thing, is it a 3 or 4 inch exchanger? I think the old 3 inch ones are not big enough. Spareparts bout covered it all.Attach the waterhose and muffs and crank it up and check your water flow. Just dont run it extremely hot, its an alum block with a cast iron head and I dont think it would take alot ta blow a head gasket. Two different metals heating up differently! NEVER start one without the water hooked up!
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77 V20 cuddy with 170 I/O Mercruiser
72 16ft. Carolina w/a 25hp Evinrude
Last edited by cfelton; 01-05-2008 at 08:55 PM.
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