Thermostat for Yamaha F150 4-Stroke Outboards – 140°F (60°C), Replaces 67F-12411-01-00
Thermostat for Yamaha F150 4-Stroke Outboards – 140°F (60°C), Replaces 67F-12411-01-00 is backordered and will ship as soon as it is back in stock.
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Thermostat for Yamaha F150 4-Stroke Outboards – 140°F (60°C), Repla...
Thermostat for Yamaha F150 4-Stroke Outboards – 140°F (60°C), Replaces 67F-12411-01-00 is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket 140°F (60°C) thermostat is designed for selected Yamaha F150 four-stroke outboard engines. It helps regulate engine operating temperature by controlling cooling-water flow through the engine, supporting reliable performance and normal operating temperature.
The thermostat is an individual replacement component, not a complete thermostat repair kit. It is listed for Yamaha F150, LF150, F150A, LF150A, F150B, and LF150B applications covered by the fitment information below.
- 140°F (60°C) opening temperature.
- Direct replacement design for the listed Yamaha outboard applications.
- Aftermarket replacement for the original thermostat.
- Verify the engine model, year, and original part number before ordering.
Part Number Matrix
These are the manufacturer and aftermarket references associated with this thermostat. Part-number references do not replace confirmation of the complete engine model and year.
| Brand | Part Number | Role |
|---|---|---|
| Yamaha | 67F-12411-01-00 | Manufacturer reference |
| Yamaha | 6CB-12411-00-00 | Manufacturer reference |
| Sierra | 18-3632 | Aftermarket reference |
Engine & Model Compatibility
The company fitment record identifies this thermostat for Yamaha F150 four-stroke outboards. The associated application information covers the following model families and years:
| Brand | Model | Rated HP | Stroke | Years | Reference |
|---|---|---|---|---|---|
| Yamaha | F150 / LF150 | 150 | 4-Stroke | 2004–2011 | 67F-12411-01-00 |
| Yamaha | F150A / LF150A | 150 | 4-Stroke | 2012–2014 | 6CB-12411-00-00 |
| Yamaha | F150B / LF150B | 150 | 4-Stroke | 2015–2018 | 6CB-12411-00-00 |
Important: Do not use the broad F75–F250 compatibility claim from the previous listing. This product record specifically identifies the application as Yamaha F150 four-stroke outboards. Confirm the exact model designation and year using the engine identification plate and your original thermostat before ordering.
Technical Specs
- Product Type
- Marine outboard thermostat
- Application
- Selected Yamaha F150 four-stroke outboards
- Opening Temperature
- 140°F (60°C)
- Installation
- Replacement thermostat; install according to the engine service manual
- Product Status
- Aftermarket replacement, not a Yamaha OEM component
What’s in the Box
- 1 x Outboard thermostat, 140°F (60°C)
This listing is for the thermostat only. A gasket, sealing rings, housing cover, or other service parts are not confirmed as included unless separately stated for the order.
Installation Notes
- Allow the engine to cool completely before beginning work.
- Disconnect the battery according to the engine service manual and observe all applicable marine-service safety procedures.
- Locate the thermostat housing and remove the cover using the correct tools.
- Note the orientation of the original thermostat before removal.
- Remove the old thermostat and clean the housing and cover mating surfaces without damaging them.
- Install the replacement thermostat in the same orientation as the original part.
- Use a new cover gasket or seal when required by the engine service manual; any additional gasket or seal is not confirmed as included with this listing.
- Reinstall the housing cover and tighten the fasteners to the manufacturer's specified torque.
- Run the engine using the proper water supply and inspect for leaks, telltale-water flow, and normal temperature operation.
- Stop operation immediately if the engine overheats, leaks, or does not show normal cooling-water flow.
Troubleshooting & FAQ
What is the opening temperature of this thermostat?
This thermostat is specified to begin opening at 140°F (60°C).
Which engines does this thermostat fit?
The company product record identifies it for selected Yamaha F150 four-stroke outboards, including F150/LF150 applications from 2004–2011, F150A/LF150A applications from 2012–2014, and F150B/LF150B applications from 2015–2018. Confirm the exact model and year before ordering.
Does this listing fit Yamaha F75, F90, F100, F200, F225, or F250 engines?
Those broader applications are not confirmed for this product record. This listing should be treated as a Yamaha F150 four-stroke thermostat unless your exact engine documentation confirms the listed reference and application.
Is this a complete thermostat repair kit?
No. This product is an individual thermostat. Gaskets, sealing rings, and other service parts are not confirmed as included.
Is this a Yamaha OEM part?
No. This is an aftermarket replacement associated with Yamaha reference numbers 67F-12411-01-00 and 6CB-12411-00-00, and aftermarket reference 18-3632.
How can I verify compatibility?
Compare the thermostat's reference number, opening temperature, engine model designation, horsepower, stroke, and model year with your engine service information and the original part before installation.
What are common signs of thermostat problems?
Possible symptoms include overheating, running below normal operating temperature, inconsistent temperature readings, or abnormal cooling-water flow. These symptoms can have several causes, so inspect the complete cooling system before replacing parts.
Safety & Important Information
- Verify the exact engine model and year before ordering.
- Compare the replacement part with the original thermostat before installation.
- Do not operate the outboard without the correct water supply and proper cooling-water flow.
- Use the engine service manual for torque values, sealing requirements, and installation procedures.
- Professional installation is recommended when the correct procedure or fitment is uncertain.
About Sea Sierra
- Marine Parts Selection — Replacement components for common marine maintenance and repair needs.
- Application-Focused Listings — Confirm model, year, part number, and specifications before installation.
- Aftermarket Value — Replacement parts selected for practical marine service applications.
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