Yamaha Thermostat 67F-12411-01-00

Shop Yamaha Thermostat 67F-12411-01-00 for compatible Yamaha outboard applications, including select F75, F90, F150, F200, F225, and F250 models.

A Yamaha outboard thermostat helps regulate engine temperature by controlling coolant water flow through the engine. When the thermostat opens and closes properly, the engine can warm up correctly and maintain a more consistent operating temperature during use.

Yamaha 67F-12411-01-00 is an OEM Yamaha thermostat part number. The safest way to confirm fitment is to match the full part number, Yamaha outboard model, horsepower, serial-number range, and parts diagram before purchasing.

Product Details

Product name: Yamaha Thermostat
OEM part number: 67F-12411-01-00
Product type: Yamaha outboard thermostat
Brand: Yamaha
System: Cooling system
Application: Compatible Yamaha outboards where 67F-12411-01-00 is specified
Common model references: Select Yamaha F75, F90, F150, F200, F225, and F250 outboards
Search variants: 67F 12411 01 00, 67F-12411-01-00, Yamaha thermostat, Yamaha outboard thermostat, Yamaha F150 thermostat

What Yamaha 67F-12411-01-00 Is Used For

Yamaha 67F-12411-01-00 is a genuine Yamaha thermostat used in compatible Yamaha outboard cooling systems. The thermostat helps control engine temperature by regulating when cooling water flows through the engine.

Use this Yamaha thermostat when your parts diagram or Yamaha service guidance specifies 67F-12411-01-00 for the cooling-system service:

The engine is running too cool
The engine is running hotter than normal
The thermostat is stuck open or closed
The engine has inconsistent operating temperature
Cooling-system service is being performed
The existing thermostat is corroded or worn
A Yamaha parts diagram lists 67F-12411-01-00
The existing thermostat part number matches 67F-12411-01-00

Because Yamaha cooling-system parts can vary by model, production range, and engine configuration, part-number confirmation is important before ordering.

Why the Yamaha Thermostat Matters

The thermostat is a small cooling-system part, but it plays an important role in engine temperature control. A properly working thermostat helps the engine warm up, maintain the right operating range, and avoid temperature swings that can affect performance.

A worn, stuck, or failed Yamaha thermostat can contribute to:

Engine overheating
Engine running too cool
Rough running during warm-up
Poor idle quality
Reduced fuel efficiency
Inconsistent temperature readings
Overheat warnings
Cooling-system performance issues
Long-term engine wear if ignored

Replacing a faulty thermostat during cooling-system service helps support smoother and more reliable Yamaha outboard operation.

Key Features

Precision temperature regulation – opens and closes at the correct temperature to maintain proper engine operating conditions
Genuine Yamaha OEM component – manufactured to Yamaha specifications for correct fit and dependable cooling-system performance
Supports efficient engine operation – helps maintain optimal combustion efficiency and fuel economy
Direct service replacement – designed for straightforward installation during cooling-system maintenance or thermostat service
Part-number-specific fitment – supports accurate ordering when 67F-12411-01-00 is listed for your engine

Engine and Boat Compatibility

This Yamaha thermostat is commonly associated with select Yamaha outboard models listed for this product.

F75 - 2005-Current
F80 - All Models
F90 - 2005-Current
F100 - 2001 and newer
F150 - 2005-Current
F200 - 2005-Current
F225 - 2005-Current
F250 - 2005-Current
FL150 - 2010
LF150 - 2005-Current
LF200 - 2005-Current
LF225 - 2005-Current
LF250 - 2005-Current
VF200 - 2009-2010
VF225 - 2009-2010
VF250 - 2009-2010

Always verify your specific model for fitment.

How to Confirm This Yamaha Thermostat Fits

Confirm fitment before ordering Yamaha Thermostat 67F-12411-01-00. Thermostats can vary by Yamaha outboard model, horsepower, serial-number range, and cooling-system design.

Before buying, check:

Yamaha outboard model
Engine horsepower
Serial number or production range
Existing thermostat part number
Yamaha parts diagram
Owner’s manual or service manual
Whether 67F-12411-01-00 is listed for your engine
Whether thermostat gaskets, seals, or covers are also needed
Whether the cooling issue may involve the water pump, poppet valve, or temperature sensor

If your parts diagram or existing thermostat lists 67F-12411-01-00, this is the correct product page to review.

Common Yamaha Model References

This Yamaha thermostat is commonly associated with select Yamaha outboard models listed for this product.

Yamaha F75
Yamaha F90
Yamaha F150
Yamaha F200
Yamaha F225
Yamaha F250

Always confirm final compatibility by checking the specific model, serial-number range, and Yamaha parts diagram before ordering.

When to Replace a Yamaha Outboard Thermostat

Replace a Yamaha outboard thermostat when it is stuck, corroded, damaged, no longer regulating temperature correctly, or recommended for replacement during cooling-system service.

Common reasons to inspect or replace the thermostat include:

Engine overheating
Engine running colder than expected
Inconsistent temperature readings
Overheat alarm
Poor warm-up behavior
Corrosion around the thermostat
Salt, scale, or debris buildup
Cooling-system maintenance
Unknown service history
Thermostat housing already removed for inspection

If an engine overheats, inspect the full cooling system before assuming the thermostat is the only problem.

Yamaha Thermostat vs. Water Pump Issue

A thermostat problem and a water pump problem can both affect engine temperature, but they are different cooling-system issues.

Thermostat issue: may cause the engine to run too hot, too cool, or inconsistently because the thermostat is not opening or closing correctly.
Water pump issue: may cause weak telltale flow, reduced cooling-water circulation, overheating, or poor water pressure.
Poppet valve issue: may affect water pressure regulation in some Yamaha cooling systems.
Sensor issue: may cause inaccurate temperature readings or warnings.

If the engine is overheating, check the thermostat, water pump, impeller, cooling passages, poppet valve, and temperature sensors as needed.

What to Order With Yamaha 67F-12411-01-00

When replacing a Yamaha thermostat, inspect related cooling-system parts and gather all required service items before starting.

Related parts to verify in the diagram include:

Thermostat gasket
Thermostat cover gasket
O-ring or seal, where applicable
Thermostat cover hardware
Water pump repair kit
Impeller
Poppet valve components
Temperature sensor, if diagnosis points to it
Marine grease or anti-corrosion products
Replacement bolts, if old hardware is corroded

Do not reuse damaged gaskets or seals if the service procedure calls for replacement.

Basic Yamaha Thermostat Replacement Considerations

Always follow the Yamaha service manual for your exact outboard model. Thermostat location, cover design, gasket type, and torque specifications can vary by engine.

Basic process:

Turn off the engine and allow it to cool completely.
Disconnect the battery if required by the service procedure.
Locate the thermostat housing.
Remove the thermostat cover carefully.
Note the orientation of the old thermostat.
Remove the old thermostat.
Inspect the housing, gasket surface, and cooling passages.
Install the new Yamaha thermostat in the correct orientation.
Replace gaskets or seals where required.
Reinstall the thermostat cover according to Yamaha guidance.
Run the engine with proper water supply.
Check for leaks and confirm normal operating temperature.

Do not open the cooling system while the engine is hot.

Frequently Asked Questions About Yamaha Thermostat 67F-12411-01-00

What is Yamaha 67F-12411-01-00?

Yamaha 67F-12411-01-00 is a genuine Yamaha thermostat part number used in compatible Yamaha outboard cooling systems.

What does a Yamaha outboard thermostat do?

A Yamaha outboard thermostat helps regulate engine temperature by controlling cooling water flow through the engine as it warms up and operates.

How do I know if 67F-12411-01-00 fits my Yamaha outboard?

Confirm fitment by checking your Yamaha outboard model, horsepower, serial number, parts diagram, and existing thermostat part number. If your diagram lists 67F-12411-01-00, this is the correct product page to review.

Is 67F-12411-01-00 an OEM Yamaha part number?

Yes, 67F-12411-01-00 is an OEM Yamaha thermostat part number. Always match the full part number before ordering.

What are signs of a bad Yamaha thermostat?

Signs of a bad Yamaha thermostat can include overheating, running too cool, inconsistent temperature readings, poor warm-up behavior, corrosion, or temperature-related warning alarms.

Can a bad thermostat cause a Yamaha outboard to overheat?

Yes, a stuck or failed thermostat can cause a Yamaha outboard to overheat if it does not allow proper cooling water flow through the engine.

Should I replace the gasket with a Yamaha thermostat?

Yes, replace the thermostat gasket or seal if Yamaha service guidance calls for it or if the old gasket is worn, damaged, or compressed.

Is overheating always caused by the thermostat?

No, overheating can also be caused by a worn impeller, weak water pump, clogged cooling passages, poppet valve issues, low water flow, or sensor problems. Diagnose the cooling system before replacing parts.

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