The Sierra 18-3649 Thermostat is designed to regulate engine operating temperature by controlling cooling-water flow in Mercruiser applications. It replaces Mercruiser 8M0109441.
Standard replacement Mercruiser 350 5.7 MAG MPI standard cooling system thermostat.
Temperature Rating: 160°F (71degree C)
Fits: 1987 & newer GM engines with standard cooling requiring a 160° thermostat
Use With:
18-2917Â Â Gasket, Thermostat Housing
18-3647Â Â Thermostat Kit
18-3648Â Â Thermostat Kit
18-3644Â Â Thermostat Kit
Need help with fitment? Contact us with your engine model and serial number and we'll help check suitability.
What is Sierra 18-3649?
Sierra 18-3649 is an aftermarket thermostat for Mercruiser applications.
Which part numbers cross-reference Sierra 18-3649?
This listing cross-references Mercruiser 8M0091470, Mercruiser REC8M0091470, Crusader 97895 and GLM 13100. See the Cross References & Alternative Products section above for linked alternatives where available.
How can I check whether Sierra 18-3649 fits my Mercruiser application?
Contact us with your engine model and serial number and we'll help check suitability.
Australian Dollars
