Mercruiser 14" Alpha Sterndrive Engine Coupler

Mercury Mercruiser Marine - COUPLING ASSY (#18643A5)

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$400.49

$392.42

Part #: 18643A5

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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 AND FLYWHEEL MERCRUISER350 MAG. ALPHA EFI(GEN+) GM 350 V-8 1996 MERCRUISER5.7LX BRAVO EFI (GEN+) GM 350 V-8 1996
CRANKSHAFT AND PISTONS MERCRUISER4.3LX (GEN +) (2 BBL.) GM 262 V-6 1996-1997 MERCRUISER4.3LXH (GEN +) (4 BBL.) GM 262 V-6 1996-1997
Flywheel, Coupler and Flywheel Housing
Cylinder Block(Flywheel Housing and Rear Main Seal)
Cylinder Block, Flywheel Housing and Rear Main Seal
Flywheel, Coupler and Flywheel Housing MERCRUISER4.3L CARB ALPHA/BRAVO
Flywheel Housing
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
Flywheel Housing MERCRUISER3.0L TKS Plus
CRANKSHAFT AND FLYWHEEL MERCRUISER5.7L EFI (2 BBL.-TBI) GM 350 V-8 1996 MERCRUISER5.7LX EFI (4 BBL.-TBI) GM 350 V-8 1996
CRANKSHAFT AND FLYWHEEL MERCRUISER350 MAG. ALPHA (4 BBL.) GM 350 V-8 1996 MERCRUISER5.7L (2 BBL.) GM 350 V-8 1996 MERCRUISER5.7LX (4 BBL) GM 350 V-8 1996
CRANKSHAFT AND FLYWHEEL MERCRUISER5.7L ALPHA EFI (TBI) GM 350 V-8 1995 MERCRUISER5.7L BRAVO EFI (TBI) GM 350 V-8 1995
CRANKSHAFT AND FLYWHEEL MERCRUISER5.7L EFI (2 BBL.-TBI) GM 350 V-8 1997 MERCRUISER5.7LX EFI (4 BBL.-TBI) GM 350 V-8 1997
CRANKSHAFT AND FLYWHEEL MERCRUISER350 MAG. ALPHA EFI(GEN+) GM 350 V-8 1997 MERCRUISER5.7L EFI (GEN+) REPOWER PLUS GM 350 V-8 MERCRUISER5.7LX BRAVO EFI (GEN+) GM 350 V-8 1997
CRANKSHAFT AND FLYWHEEL MERCRUISER350 MAG. ALPHA (4 BBL.) GM 350 V-8 1997 MERCRUISER5.7L (2 BBL.) GM 350 V-8 1997 MERCRUISER5.7LX (4 BBL) GM 350 V-8 1997
Crankshaft and Pistons MERCRUISER4.3L EFI (GEN+) TBI GM 262 V-6
CRANKSHAFT AND FLYWHEEL MERCRUISER350 MAG MPI ALPHA/BRAVO
Crankshaft And Pistons MERCRUISER4.3L (GEN +) (2 BBL.) GM 262 V-6 1998 MERCRUISER4.3LH (GEN +) (4 BBL.) GM 262 V-6 1998
Crankshaft And Flywheel MERCRUISER5.0L (2 BBL.) GM 305 V-8 1998-2001 MERCRUISER5.7L (2 BBL.) GM 350 V-8 1998-2001
Crankshaft And Pistons
Cylinder Block(Flywheel Housing and Rear Main Seal)
CRANKSHAFT AND FLYWHEEL MERCRUISER5.0L EFI GM 305 V-8 1998 MERCRUISER5.7L EFI GM 350 V-8 1998
Flywheel, Coupler and Flywheel Housing
Cylinder Block-Flywheel Housing MERCRUISER350 MAG MPI HORIZON ALPHA/BRAVO MERCRUISER5.0L MPI ALPHA/BRAVO MERCRUISERMX 6.2L MPI BRAVO MERCRUISERMX 6.2L MPI HORIZON BRAVO
Flywheel, Coupler And Flywheel Housing MERCRUISER4.3L MPI ALPHA/BRAVO
Cylinder Block and Flywheel Housing MERCRUISER5.0L CARB ALPHA/BRAVO MERCRUISER5.7L CARB ALPHA/BRAVO
Cylinder Block and Flywheel Housing
Flywheel, Coupler and Flywheel Housing
Flywheel Housing
Flywheel, Coupler and Flywheel Housing
Cylinder Block(Flywheel Housing and Rear Main Seal)
Flywheel, Coupler and Flywheel Housing
Cylinder Block(Flywheel Housing and Rear Main Seal)
Cylinder Block, Flywheel Housing and Rear Main Seal
Flywheel Housing
Cylinder Block, Flywheel Housing and Rear Main Seal
Flywheel, Coupler and Flywheel Housing MERCRUISER4.3L MPI ALPHA/BRAVO EC
Cylinder Block(Flywheel Housing and Rear Main Seal)
Cylinder Block, Flywheel Housing and Rear Main Seal
Flywheel Housing MERCRUISER3.0L MPI EC
Cylinder Block, Flywheel Housing and Rear Main Seal MERCRUISER377 MAG MPI BRAVO
Cylinder Block, Flywheel Housing and Rear Main Seal MERCRUISER350 MAG MPI ALPHA/BRAVO EC MERCRUISER350 MAG MPI HORIZON ALPHA/BRAVO EC MERCRUISER377 MAG MPI BRAVO EC MERCRUISER5.0L MPI ALPHA/BRAVO EC
Flywheel, Coupler and Flywheel Housing
Flywheel, Coupler and Flywheel Housing
Crankshaft And Pistons MERCRUISER262 MAG (TBI)(GEN+)
Cylinder Block, Flywheel Housing and Rear Main Seal
Crankshaft And Flywheel MERCRUISER5.0L EFI GM 305 V-8 1999-2001 MERCRUISER5.7L EFI GM 350 V-8 1999-2001
Cylinder Block(Flywheel Housing and Rear Main Seal) MERCRUISER350 MPI ALPHA
Flywheel, Coupler and Flywheel Housing
Cylinder Block(Flywheel Housing and Rear Main Seal) MERCRUISER357 Alpha 4V MERCRUISER357 Mag Bravo 4V MERCRUISER383 Mag Bravo 4V
CRANKSHAFT AND PISTONS MERCRUISER4.3L (GEN II) (2 BBL.) GM 262 V-6 1996 MERCRUISER4.3LX (GEN II) (4 BBL.) GM 262 V-6 1996
Crankshaft, Camshaft and Water Pump MERCRUISER3.0L GM 181 I/L4
Crankshaft And Pistons MERCRUISER4.3L (GEN +) (4BBL) Reman
CRANKSHAFT AND PISTONS MERCRUISER4.3L (GEN II) (2 BBL.) GM 262 V-6 1993-1995 MERCRUISER4.3LX (GEN II) (4 BBL.) GM 262 V-6 1993-1995
Crankshaft and Flywheel
Flywheel and Coupler MERCRUISER4.5L MPI 200 Alpha/Bravo MERCRUISER4.5L MPI 200 Alpha/Bravo EC MERCRUISER4.5L MPI 250 Alpha/Bravo MERCRUISER4.5L MPI 250 Alpha/Bravo EC