Mercruiser 18643A-5 Engine Coupler Assembly
Mercruiser 18643A-5 Engine Coupler Assembly, Mercruiser 18643A-5 Engine Coupler AssemblyGenuine OEM Mercury - Mercruiser part. Replacement engine coupling assembly for Mercruiser stern drives.Fits: MCM 3.0L (1999-2016), 4.5L MPI, GM V-6 & V-8 (305 & 350 CID) engines (1993-2015) with Alpha Triangular shape, flywheel mount;