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1981 colbolt with a mercruiser 228 fresh water cooled engine

Buckeye700179

New member
Hello. I have a 1981 colbolt with a 227 mecruiser freah water cooled engine and I would like to know if this fresh water cooled engine uses a block off plates between manifold and elbows. I'm having an overheating problem and have already changed the impeller.
 
functionally, yes....some of the early versions may have "distribution blocks" that incorporate that function - depends upon which flavor of exhaust manifolds are used...
 
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