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Yamaha Outboard Parts

Shop OEM and aftermarket Yamaha outboard parts for maintenance, repair, troubleshooting, and complete engine rebuild projects. Browse Yamaha marine parts by system, including cooling, fuel, electrical, internal engine, lower unit, steering, trim, and routine service parts.

Pro Marine USA carries parts for Yamaha 2-stroke, Four Stroke, VMAX SHO, HPDI, and offshore outboards. Verify your engine model code, serial information, or OEM part number whenever possible before ordering.

Shop Yamaha Outboard Parts by System

Rebuilding a Yamaha Outboard?

Shop internal Yamaha engine rebuild parts by engine family to quickly find pistons, rings, cylinder sleeves, bearings, connecting rods, gaskets, valves, and other powerhead components for your application.

Shop Engine Rebuild Parts by Model »

Find the Correct Yamaha Outboard Part

Yamaha parts can vary by horsepower, model code, production year, and engine family. Use the OEM parts lookup to identify the original Yamaha part number from the factory diagram before ordering.

Once you have the OEM number, search Pro Marine USA for available genuine Yamaha and aftermarket replacement options.

Use Our OEM Parts Lookup »
Common Yamaha Outboard Engine Families

Pro Marine USA supports many popular Yamaha outboards across a wide horsepower range. Always confirm your exact model information before ordering parts.

  • Portable and Midrange: Yamaha 2HP through 60HP 2-stroke and Four Stroke applications
  • Inline Four-Cylinder: popular Yamaha F70 through F150 platforms
  • V6 Four Stroke: Yamaha V6 engine families across multiple horsepower ranges
  • VMAX SHO: performance-oriented Yamaha SHO applications
  • HPDI: high-pressure direct-injection Yamaha 2-stroke applications
  • High-Horsepower Offshore: large-displacement Yamaha offshore platforms
Common Yamaha Outboard Repair Areas
  • Engine overheating: water pumps, impellers, thermostats, cooling passages, and engine anodes.
  • Hard starting or rough running: fuel pumps, filters, injectors, carburetors, spark plugs, ignition components, and intake components.
  • Charging or ignition problems: ignition coils, stators, rectifier/regulators, sensors, wiring, and grounds.
  • Low compression or power loss: pistons, rings, cylinders, valves, bearings, gaskets, and other internal engine components.
  • Lower unit problems: seals, bearings, gears, shafts, and gear lube components.
  • Trim or steering problems: trim motors, hydraulic components, steering cylinders, hoses, and seals.
Why Buy Yamaha Outboard Parts from Pro Marine USA?
  • Genuine Yamaha OEM and aftermarket replacement options for many applications.
  • Parts for maintenance, professional repair, engine rebuilds, lower units, fuel systems, electrical systems, steering, and trim.
  • OEM diagram and part-number lookup tools to help identify the correct component.
  • Dealer pricing available for qualified marine businesses.
  • Large selection of Yamaha service kits and repair components.
  • Fast weekday shipping on qualifying in-stock orders.
Frequently Asked Questions

How do I find the correct Yamaha outboard part?

Start with the engine horsepower, model code, production year, and available identification information. Use the OEM parts lookup to identify the original Yamaha part number whenever possible.

Can I search Yamaha parts by OEM part number?

Yes. Enter the Yamaha OEM part number into the Pro Marine USA site search to locate available OEM and aftermarket replacement options.

Do Yamaha outboard parts vary by model and year?

Yes. Yamaha may use different components on engines with the same horsepower depending on model code, engine family, and production range.

Do you carry Yamaha engine rebuild parts?

Yes. Pro Marine USA carries pistons, rings, bearings, connecting rods, cylinder sleeves, gaskets, valves, and other internal engine components for many Yamaha applications. You can also shop our Engine Rebuild Parts by Model section to narrow parts by engine family.

Do you carry both OEM and aftermarket Yamaha parts?

Yes. Pro Marine USA offers genuine Yamaha parts along with aftermarket replacement options for many Yamaha maintenance, repair, and rebuild applications.

What Yamaha parts are commonly replaced during routine maintenance?

Common maintenance items include engine oil, oil filters, fuel filters, spark plugs, water pump kits, impellers, thermostats, gear lube, drain plug seals, anodes, and model-specific service kit components.

Fitment Tip: Yamaha parts can vary by model code, engine family, production year, and horsepower. Confirm the OEM part number or complete engine identification information whenever possible before ordering.

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Yamaha 150-250 3.1L
Item#:
61A-85510
Cross Reference#:
61A-85510-00-00
61A-85510-01-00
61A-85510-02-00
65L-85510-00-00
65L-85510-10-00
65L-85510-11-00
Manufacturer Item:
65L-85510-10-00
Manufacturer:
Yamaha Outboard
Available:
In Stock
Your Price:
855.99
Each
OEM Yamaha 4.2L V6 Thermostat 52 Degree C

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


Fitment Note: This thermostat is used in Yamaha 4.2L V6 FourStroke cooling systems including many offshore, LF counter-rotation, and VF SHO 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.

Apply for a Dealer Account

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

Item#:
6CE-12411-00-00
Cross Reference#:
18-3524
6CE-12411-00-00
8M6012799
Manufacturer Item:
6CE-12411-00-00
Manufacturer:
Yamaha Outboard
Available:
In Stock
Your Price:
54.95
Each
Yamaha F200-F350 2010 & Up
Item#:
6CE-44352P
Cross Reference#:
18-45617
18-45617-1
6CE-44352
6CE-44352-00-00
8M0175392
8M6010334
Manufacturer Item:
6CE-44352-00-00
Manufacturer:
Pro Marine
Available:
In Stock
Your Price:
32.61
Each
Yamaha VF115-F350
Item#:
85896
Cross Reference#:
6P2-85896-00-00
Manufacturer Item:
6P2-85896-00-00
Manufacturer:
Pro Marine
Available:
In Stock
Your Price:
72.77
Each
Yamaha F150 2004 & Up
Item#:
63P1312A
Cross Reference#:
63P-1312A-00-00
63P-1312A-01-00
63P-1312A-02-00
Manufacturer Item:
63P-1312A-02-00
Manufacturer:
Yamaha Outboard
Available:
In Stock
Your Price:
444.99
Each
Yamaha 150 200 hp EFI 2001-2005
Item#:
679201
Cross Reference#:
18-7655
67H-8592A-00-00
67H-8592A-01-00
Manufacturer Item:
67H-8592A-01-00
Manufacturer:
Pro Marine
Available:
In Stock
Your Price:
256.47
Each
Yamaha F300-425hp 2007 and up
Item#:
18-55507
Cross Reference#:
6AW-81800-00-00
6AW-81800-01-00
6AW-81800-02-00
Manufacturer Item:
6AW-81800-00-00
Manufacturer:
Sierra
Available:
In Stock
Your Price:
1220.49
Each
Yamaha HPDI 225-250 VZ,LZ,Z 225-250
Item#:
7307
Cross Reference#:
18-6832
60V-81800-00-00
60X-81800-00-00
60X-81800-01-00
8M6007430
Manufacturer Item:
60X-81800-00-00
Manufacturer:
Pro Marine
Available:
In Stock
Your Price:
480.37
Each
Yamaha 40-50hp 1984-1988
Item#:
3425A
Cross Reference#:
18-6422
6H4-81800-10-00
6H4-81800-11-00
6H4-81800-12-00
8M6007417
Manufacturer Item:
6H4-81800-10-00
Manufacturer:
Arco
Available:
In Stock
Your Price:
318.27
Each
Yamaha 115hp-200hp V4 V6 V6 XL Special F50 4 Stroke
Item#:
3426A
Cross Reference#:
6E5-81800-11-00
6E5-81800-12-00
8M6007413
Manufacturer Item:
6E5-81800-12-00
Manufacturer:
Arco
Available:
In Stock
Your Price:
518.08
Each
Yamaha 60-90hp
Item#:
MOT5001
Cross Reference#:
6H3-81800-10-00
6H3-81800-11-00
8M6007418
Manufacturer Item:
6H3-81800-10
Manufacturer:
Yamaha Outboard
Available:
Special Order
Your Price:
338.97
Each
Item#:
3427A
Cross Reference#:
18-6423
688-81800-10-00
688-81800-11-00
688-81800-12-00
688-81800-13-00
8M6007419
Manufacturer Item:
688-81800-10-00
Manufacturer:
Arco
Available:
In Stock
Your Price:
521.46
Each
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