MerCruiser 423-810842T Crankshaft 3.0L 140hp 4cyl 1990-1999 1-Piece Oil Seal Carburetor basically the housings are the

basically the housings are the same internally no matter what drive/engine you have from that period of 1983-1990 with this style of housing (I-4 4cyl

but not perfect

can't find number in parts diagrams)

Please make sure the parts you are swapping with are stamped 98503 or 95755

0L 140hp engines which has arrestors with smaller openings)

MerCruiser 423-810842T Crankshaft 3.0L 140hp 4cyl 1990-1999 1-Piece Oil Seal Carburetor basically the housings are theItem Details MerCruiser Part Number 423 810842T Used from 1990 1999? on MerCruiser & OMC GM 140hp 4cyl 3. 0L engines using the 1 piece oil seal Engine Serial Numbers SN# 0L605541 & Below This is for engines with a 1 piece rear main seal. which they switched over to in 1990 MerCruiser Part Number 423 810842 423 810842T GM part # N140966 140966 140968? as I see in some references Just make sure yours has the same stamped part number of 140966 Engine