02-09-2020, 03:21 PM
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#16
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Senior Member
Join Date: May 2010
Location: Oshkosh, Wi
Posts: 4,527
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Re: Exact Engine Year
Quote:
Originally Posted by JSeery
The 221 and 239 cubic inch blocks can be differentiated by the center water holes in the cylinder head decks. From Fred Mills document.
This is not an area I am all that knowledgeable in, but I believe the shapes of the water holes between the two center cylinders indicate it is a Mercury block. So, I would say 1941 Mercury. But you would still need to check the bearings and crank dimensions.
The photos (from Fred Mills) show a block with factory relief.
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I agree.
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