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    Is a 1992 4.3 l v-6 Merc motor replacable with an automotive type 4.3 engine block?

    I've got a blown 1992 MerCrusier 4.3L. A Marine 4.3L long block is ~2500 dollars. The same long block at Autozone is 1300. What's the difference? From what I have been told, is the Marine engine has brass freeze plugs and a different camshaft with heavier springs. Thanks, Chuck
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