Description
Quicksilver 8M6012540 Yamaha 2-Stroke Thermostat With O-Ring
Service your compatible Yamaha outboard with Quicksilver 8M6012540. Match the engine model, serial number and parts catalog before purchasing a replacement thermostat.
Key Features
- Replacement part for the specific applications listed below.
- Supports cooling-system temperature regulation.
- Includes an O-ring.
Fitment & Applications
- Select Yamaha two-stroke outboards; excludes 3.1L engines.
- 9.9/15 HP: 1996 and newer; 20 HP; 25 HP two- and three-cylinder; 30/40 HP; C40: 1998 and newer.
- 50, C50, P50, C75, P75, E75, C80, C85, 90 and C90.
- 115, B115, C115, P115, S115, 130 and S130.
- 150, C150, D150, DX150, P150, PX150, SX150, V150, VX150, VZ150 and Z150.
- 175, VZ175, Z175, 200, P200, SX200, V200, VX200, VZ200 and Z200.
- 225, S225, SX225, VX225, 250, S250, SX250 and VX250.
Fitment is model-specific. Horsepower alone is insufficient; check the exact engine family and model.
Product Details
- Brand: Quicksilver
- Part number: 8M6012540
- Product: Thermostat
- Engine type: Two-stroke
- Yamaha references: 688-12411-11-00 and 6E5-12411-30-00
What's Included
- Thermostat
- O-ring
Service Notes
Follow the engine service manual for thermostat orientation, required seals and torque values. Inspect the cooling system and check operation after installation. Quicksilver supplies these as aftermarket service parts for the listed engine brands.
Why You Should Buy
A clearly identified part number and application list help you match the replacement to your engine before beginning service.
Common Applications
Marine engine cooling-system maintenance and replacement of a worn or faulty thermostat.
FAQ
How do I confirm compatibility?
Check the exact model, year and serial number against the manufacturer's parts diagram. Contact us with those details if you need help.
Will replacing the thermostat solve every cooling problem?
No. Diagnose the cooling system and inspect its other components as directed by the engine service manual.





