Mercury Mercruiser Marine - COUPLER KIT (#18643A7)

Fits MCM 3.0L (1999 & newer), GM V-6 & V-8 (305 & 350 cid) engines (1993 and newer). This coupler is used with the 14 inch flywheel. If you are unsure as to whether you have a 12-3/4 or 14 inch flywheel, measure the distance from the center of the driveshaft splines to the center of one of the mounting holes. The 14" couplers will have a radius of 6.32

Mercury Assemblies

Crankshaft & Pistons MERCRUISER185 (2 BBL.) GM 262 V-6 1985-1987 MERCRUISER205 (4 BBL.) GM 262 V-6 1985-1987
CRANKSHAFT, PISTONS AND CONN. RODS MERCRUISER300 TEMPEST GM 350 V-8 1985-1986
CRANKSHAFT AND PISTONS MERCRUISER350 MAG. ALPHA GM 350 V-8 1986-1987
CRANKSHAFT, PISTONS AND CONN. RODS MERCRUISER320 (EFI) GM 350 V-8 1987
CRANKSHAFT AND PISTONS MERCRUISER200 (2 BBL.) GM 305 V-81 1985-1986 MERCRUISER228 (4 BBL.) GM 305 V-8 1982-1984 MERCRUISER230 (4 BBL.) GM 305 V-8 1985-1986 MERCRUISER260 GM 350 V-8 1982-1986 MERCRUISER260 (4 BBL.) GM 305 V-8 1982-1986 MERCRUISER898 (2 BBL.) GM 305 V-8 1983-1984
CRANKSHAFT, PISTONS AND CONNECTING RODS MERCRUISER454 MAG. ALPHA GM 454 V-8 1986-1988
CRANKSHAFT AND PISTONS MERCRUISER175 (2 BBL.) GM 262 V-6 1987 MERCRUISER205 (4 BBL.) GM 262 V-6 1987 MERCRUISER4.3L (2 BBL.) GM 262 V-6 1988-1992 MERCRUISER4.3LX (4 BBL.) GM 262 V-6 1988-1992
CRANKSHAFT, PISTONS AND CONN. RODS MERCRUISER320 (EFI) GM 350 V-8 1988-1989
CRANKSHAFT AND PISTONS MERCRUISER4.3L (GEN II) (2 BBL.) GM 262 V-6 1992-1993 MERCRUISER4.3LX (GEN II) (4 BBL.) GM 262 V-6 1992-1993
CRANKSHAFT, PISTONS AND CONNECTING RODS MERCRUISER7.4L BRAVO GM 454 V-8 1988-1991
CRANKSHAFT AND FLYWHEEL MERCRUISER200 (2 BBL.) GM 305 V-8 1987 MERCRUISER230 (4 BBL.) GM 305 V-8 1987 MERCRUISER260 GM 350 V-8 1987 MERCRUISER260 (4 BBL.) GM 305 V-8 1987 MERCRUISER350 MAG. ALPHA GM 350 V-8 1987-1995 MERCRUISER5.0L (2 BBL.) GM 305 V-8 1988-1995 MERCRUISER5.0LX (4 BBL.) GM 305 V-8 1988-1995 MERCRUISER5.7L GM 350 V-8 1988-1995