120 H.P. Mercruiser


Old 08-14-09, 07:11 AM
Thread Starter
Join Date: Nov 2008
Location: western N.Y.
Posts: 66
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.
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Old 08-14-09, 09:36 PM
Join Date: Jul 2008
Location: Montgomery MN
Posts: 541
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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