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Yamaha Outboard Parts
Shop Yamaha outboard motor parts by system, including cooling, fuel delivery, electrical, internal engine components, lower unit parts, and routine service items. Browse OEM and replacement Yamaha marine parts for maintenance, repair, and rebuild projects.
Shop by System
- Complete Powerheads
- Control Cables & Boxes
- Cooling System
- Cowlings & Components
- Electrical System
- Engine Oil
- Engine Rebuild Kits
- Fuel & Carburetion System
- Intake System
- Internal Engine Components
- Lower Unit Components
- Oiling System
- Paints
- Service & Oil Change Kits
- Service Manuals
- Steering Systems
- Throttle Components
- Transom & Midsection
- Trim System
Common Yamaha Outboard Model References
This category supports many popular Yamaha outboards across a wide horsepower range. Always confirm your model and serial number for best fitment.
- Portable & Midrange: 2HP–60HP (2-stroke & 4-stroke)
- Inline 4 Models: F70–F150 (common Four Stroke platforms)
- V6 Four Stroke: F150–F300
- High Horsepower Offshore: F350–F450 (select platforms)
- Performance Lines: VMAX / SHO and HPDI (model-dependent)
688-8258A-60-00
6EK-12411-00-00
6EK-12411-00-00
8M0175396
8M6010301
8M6013870
68T-44352-00-00
24435
6AW-44352-00-00
65L-8592A-01-00
9-32101
6K1-8258A-41-00
6X3-8258A-00-00
6X3-8258A-10-00
61A-8258A-00-00
688-8258A-50-00
688-8258A-60-00
64E-43139-00-00
64E-43139-01-00
64E-43139-02-00
99999-03830-00
61A-85510-01-00
61A-85510-02-00
65L-85510-00-00
65L-85510-10-00
65L-85510-11-00
OEM Yamaha Thermostat Assembly
Genuine Yamaha 4.2L V6 Thermostat
This genuine OEM Yamaha thermostat assembly replaces Yamaha part number 6CE-12411-00-00 and also cross references Mercury OEM number 8M6012799.
The thermostat regulates engine cooling system temperature to help maintain proper engine operating temperature, fuel efficiency, corrosion protection, and overall engine performance.
Compatible Applications
| Engine Range | Engine Type | System | Application Notes |
|---|---|---|---|
| Yamaha F225 / LF225 | 4.2L FourStroke V6 | Cooling System | Select models using thermostat 6CE-12411-00-00 |
| Yamaha F250 / LF250 | 4.2L FourStroke V6 | Cooling System | Select offshore and standard rotation applications |
| Yamaha F300 / LF300 | 4.2L FourStroke V6 | Cooling System | Used in compatible offshore cooling systems |
| Yamaha VF250 | V MAX SHO 4.2L | Cooling System | Select SHO cooling system applications |
Mercury OEM number 8M6012799 cross references this Yamaha thermostat for compatible Mercury-branded Yamaha powerhead applications.
Always verify your model number, serial number, and cooling system diagram before ordering thermostats and cooling system components.
OEM Part Numbers & Cross References
| Brand / Type | Part Number |
|---|---|
| Yamaha OEM | 6CE-12411-00-00 |
| Mercury OEM Cross Reference | 8M6012799 |
| Alternate Search Format | 6CE124110000 |
Alternative Thermostat Options
Looking for aftermarket replacement options?
What This Thermostat is Used For
This thermostat is used in compatible Yamaha and Mercury FourStroke cooling systems to regulate engine operating temperature.
The thermostat controls coolant flow through the engine to help the engine warm up properly and maintain consistent operating temperature.
A faulty thermostat may contribute to overheating, improper engine temperature, poor fuel efficiency, or excessive engine wear.
Replacing worn thermostats during cooling system maintenance helps maintain reliable engine performance and cooling system operation.
Key Features and Benefits
- Genuine OEM Yamaha thermostat assembly
- Fits select Yamaha F225, F250, F300, LF-series, and VF250 models
- Designed for Yamaha 4.2L V6 cooling systems
- Helps maintain proper engine operating temperature
- Supports cooling system performance and engine efficiency
- Common replacement during cooling system service
- OEM Yamaha fit and temperature calibration
Thermostat Details
- Brand: Yamaha OEM
- Part Type: Thermostat Assembly
- OEM Part Number: 6CE-12411-00-00
- Mercury Cross Reference: 8M6012799
- Application: Yamaha 4.2L V6 Cooling Systems
- System: Cooling System
- Use: Engine temperature regulation
- Quantity Sold: Each
FAQ
What does Yamaha 6CE-12411-00-00 fit?
This thermostat fits select Yamaha F225, F250, F300, LF-series, and VF250 4.2L V6 outboards.
What does this thermostat do?
It regulates engine cooling system temperature and coolant flow.
Can a bad thermostat cause overheating?
Yes. A faulty thermostat may restrict coolant flow or prevent proper engine temperature regulation.
Are aftermarket versions available?
Yes. Pro Marine and EMP aftermarket versions are also available.
Should I verify fitment before ordering?
Yes. Yamaha used multiple thermostat configurations depending on model and production range.
Dealer Discounts & Store Policies
Dealer / Marine Industry Discounts
Are you a marine dealer, technician, boat builder, or industry professional? We offer dealer pricing for qualified marine businesses.
Shipping Policy
- Free shipping on orders over $100 continental U.S.
- Orders ship via UPS, USPS, and FedEx.
- Orders received before 5:30 PM EST ship the same business day.
- Typical delivery time is 1–5 business days.
30-Day Return Policy
- Returns accepted within 30 days of delivery.
- Cooling system components should be installed only after confirming correct fitment.
- Items must be new, unused, and in original packaging.
- Return authorization is required before sending items back.
Need help with a return or order question?
Contact Us
Phone: 941-721-3000
Searchable Terms
6CE-12411-00-00, 8M6012799, Yamaha thermostat, Yamaha 4.2 thermostat, Yamaha F225 thermostat, Yamaha F250 thermostat, Yamaha F300 thermostat, Yamaha LF250 thermostat, Yamaha LF300 thermostat, Yamaha VF250 thermostat, Mercury thermostat, Mercury 8M6012799, offshore thermostat, cooling system thermostat, FourStroke thermostat
6CE-12411-00-00
8M6012799
18-45617-1
6CE-44352
6CE-44352-00-00
8M0175392
8M6010334