Description
The Yamaha 66M-12411-01-00 is a genuine OEM thermostat for a wide range of Yamaha small and mid four-stroke outboards.
Fitting
A stuck thermostat causes overheating or, stuck open, an engine that never reaches operating temperature. Cheap to replace as part of a cooling system service.
Check your fitment
The engine models listed in the product specifications are a guide only. Always confirm against the parts catalogue for your engine’s model and serial number before ordering. If you are unsure, send us your engine plate details and we will check it for you.
Genuine Yamaha parts
We stock genuine Yamaha OEM parts, not pattern copies. If you need help identifying the right part for your engine, or want to book a service, get in touch.
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