Engine Coupler Kit | Sierra 18-2195 SIERRA Engine Coupler Kit 18-2195 Kit fits late style Mercruiser GM 4 cylinder engines with triangular style engine coupler This triangular style engine coupler is for GM 4 cylinder engines with late style, small crankshaft bolt pattern Fits Mercruiser model 120 engines from 1983 to 1986 with serial number range 6229718-B531853 flywheel mounted coupler Fits Mercruiser model 2.5L engines from 1987 to 1989 with serial number range B531854-C853256 flywheel mounted coupler Fits Mercruiser model 3.0L engines from 1990 to 1994 with serial number range C856559-F603999 Kit Includes 18-2146 Yoke shaft Replaces Mercury 12632A7 Replaces Marine Power 701107