MerCruiser GM 165hp 4.1L 250cid Crankshaft 3876802N OMC Stringer Chevy 425-3156 Oil Senders Pumps and Remote Filters S/N 6170297 THRU 6916778

S/N 6170297 THRU 6916778

just make sure that the opening is the correct size (2-5/8" and not 3" found on MerCarb and bigger 2bbl Rochester applications)

I know 43-24437 was a 22-tooth gear that was for single-cylinder WD3 applications that looks significantly different than this one

Previously installed on a OMC GM 3

*******5-1/2" Diameter (MEASURE YOUR PULLEY or find the stamped part number)

MerCruiser GM 165hp 4.1L 250cid Crankshaft 3876802N OMC Stringer Chevy 425-3156 Oil Senders Pumps and Remote Filters S/N 6170297 THRU 6916778Item Details Removed from a 1970's MerCruiser Alpha One GM 4. 1L 165hp 250CID Used from 1968 1979 on virtually all OMC & Mercruiser 165hp power plants. (both companies used the same GM blocks, but OMC used bolts rather than studs at the end of the crankshaft to hold the couplers on) MerCruiser Part Number 425 3156 or 425 6516 We did not see a GM part number expressedly stamped on this but this would be equivalent to 3876802 3876802N what sometimes