120 H.P. Mercruiser

Old 08-14-09, 08:11 AM
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Unhappy 120 H.P. Mercruiser

Is there a difference between a marine block and an auto block? Can they be interchanged? I have a 1986 151 cu. Mercruiser engine that i believe has a crack in the block.
Old 08-14-09, 10:36 PM
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The blocks are the same but the internals are different. So if your crank and rods are good they can be installed in a auto block.

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