140 Degree Thermostat Kit | Sierra 18-3676 140 degree thermostat kit used on OMC and Volvo Penta GM big block GM marine engines. Fits OMC 7.4L 454 CID raw water cooled marine engines from 1994 to 1998 Fits OMC 8.2L 502 CID raw water cooled engines manufactured in 1998 Fits Volvo Penta 7.4L 454 CID raw water cooled marine engines from 1993 to 2000 Kit includes 140 degree thermostat, 18-7170 o-ring, and 18-0398 gasket Replaces OMC 3853983 Replaces Volvo Penta 3853983 Replaces Mallory 9-43026