The Sierra 18-3541 Thermostat replaces Yamaha 66M-12411-01, Yamaha 66M-12411-00, Yamaha 6G8-12411-00 for Yamaha Outboard applications. It regulates cooling-water flow as the engine warms and cools, helping maintain the intended operating temperature.9/15/20HP 4-Stroke, 6HP.
Suits outboard models:
Four Stroke: F4AMH, F4BMH, F4LMHA F4SMHA, F5AMH, F5LMHA, F5SMHA, F6CMH, F6LMHA, F6SMHA, F8CMH, F8FMH, F8LMH, F8SMH, F9.9FMH, F9.9JMH, F9.9LMHB, F9.9SMHB, FT9.9DE, FT9.9GE, FT9.9LE, T9.9LPB, T9.9XPB, F15AMH, F15CMH, F15CEH, F15LEH, F15LMH, F15SEH, F15SMH, F20BEHP, F20BEP, F20BMH, F20LMH, F20LP, F20LPH, F20SMH, F20SP
Need help with fitment? Contact us with your engine model and serial number and we'll help check suitability.
What is Sierra 18-3541?
Sierra 18-3541 is an aftermarket thermostat for Yamaha Outboard applications.
Which part numbers cross-reference Sierra 18-3541?
This listing cross-references Mallory 9-43037, Yamaha 66M-12411-01, YMM YM-66M-12411-01 and Yamaha 66M-12411-00. See the Cross References & Alternative Products section above for linked alternatives where available.
How can I check whether Sierra 18-3541 fits my Yamaha Outboard application?
Contact us with your engine model and serial number and we'll help check suitability.
Australian Dollars
