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casting numbers on mercury v6 powerhead

Dagadget

New member
ok i found out through a reply on this board that i have a merc 150hp thru the serial number on the plate which is #5541195 but i believe it is not the powerhead that belongs to that serial number. attached are the only numbers on this block.no freeze out plug some of the block doesnt even have the molded in supports for where a voltage regulator or other electronic modules.what i need to know is what year? what liter?what hp? or anything else i should know also it has the old 2-piece heads and exhaust plate has wider than 2.0 rectangular chambers
any help would be greatly appreciated
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If it has the "D' shaped exhaust like gasket below it a old 2.0L 175.......

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