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MerCruiser Sterndrive Alpha One Lower Unit Complete Gearset That was generally found in 1970-1977 models (Pinion
2 are the same size and 2 are different
55-58780A 7
For 888 drives S/N 3784374 and Below
MerCruiser 423-804957T01 GM 93436083 Crankshaft 3.0L 140hp 4cyl 1-Piece Oil Seal Fuel Pump MerCruiser Sterndrive Alpha One LowerItem Details MerCruiser Part Number 423 804957T01 423 804957 Used from 1999 & UP on MerCruiser GM 140hp 4cyl 3. 0L engines using the 1 piece oil seal Engine Serial Numbers SN# 0L605541 & Below (Roughly 1999 & UP) This is for engines with a 1 piece rear main seal. and using the narrow rod journals (1999 & UP). MerCruiser Part Number 423 810842 423 810842T GM part # 93436083. DOES NOT REPLACE 140966 (as the rod journal sizes are allegedly different
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