Sierra International 18 217512 1 Engine Coupler 18-21752-1. 3L (1986-1998) 5.0L (1986-1988 1998) 5.7L (1986-1992 1994 1996-1998). It is interchangeable with OMC Stern Drive 3853917 3858437 984290 986120 and Volvo Penta 3853917 3858437. Each Sierra...