Carburetor Repair Seal Kit for Yamaha 25–50 HP and Nissan/Tohatsu 60–70 HP Outboards
Carburetor Repair Seal Kit for Yamaha 25–50 HP and Nissan/Tohatsu 60–70 HP Outboards is backordered and will ship as soon as it is back in stock.
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Carburetor Repair Seal Kit for Yamaha 25–50 HP and Nissan/Tohatsu 6...
Carburetor Repair Seal Kit for Yamaha 25–50 HP and Nissan/Tohatsu 60–70 HP Outboards is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket carburetor repair seal kit is designed for selected Yamaha outboard applications from 25 HP through 50 HP, as well as selected Nissan/Tohatsu 2-stroke 60 HP and 70 HP outboards. It is intended to renew the seals and related service components in the carburetor system during maintenance or repair.
For Yamaha applications, the kit is associated with OEM references 6H4-W0093-02, 6H4-W0093-03, and 6H4-W0093-04, and with Sierra reference 18-7768. For Nissan/Tohatsu applications, the company listing identifies OEM references 3F3-87122-1, 3F3-87122-0, and 3F3871220.
- Carburetor repair seal kit for specified marine outboard applications.
- Supports carburetor service by replacing worn or deteriorated sealing components.
- Use the exact engine model, year, and OEM reference to confirm compatibility before ordering.
- Aftermarket replacement; not an original equipment manufacturer component.
Part Number Matrix
These are the manufacturer and aftermarket references listed for the applicable engine families. A number appearing in the matrix does not by itself confirm fitment for every engine model.
| Engine Brand | Reference Type | Part Number |
|---|---|---|
| Yamaha | OEM reference | 6H4-W0093-02 |
| Yamaha | OEM reference | 6H4-W0093-03 |
| Yamaha | OEM reference | 6H4-W0093-04 |
| Sierra | Aftermarket reference | 18-7768 |
| Nissan/Tohatsu | OEM reference | 3F3-87122-1 |
| Nissan/Tohatsu | OEM reference | 3F3-87122-0 |
| Nissan/Tohatsu | OEM reference | 3F3871220 |
Engine & Model Compatibility
Confirm the brand, model designation, horsepower, stroke type, and production year of your engine before purchasing.
| Brand | Model | Rated HP | Stroke | Years | Applicable Reference |
|---|---|---|---|---|---|
| Yamaha | 25QEO | 25 | Not specified in company record | 1993–1994 | 6H4-W0093-02 / 6H4-W0093-03 / 6H4-W0093-04 |
| Yamaha | 40V, 40VM, 40VE | 40 | Not specified in company record | 1995–2014 | 6H4-W0093-02 / 6H4-W0093-03 / 6H4-W0093-04 |
| Yamaha | C40T, C40TL | 40 | Not specified in company record | 1995–2002 | 6H4-W0093-02 / 6H4-W0093-03 / 6H4-W0093-04 |
| Yamaha | 40YET | 40 | Not specified in company record | 2005–2007 | 6H4-W0093-02 / 6H4-W0093-03 / 6H4-W0093-04 |
| Yamaha | 50H, 50HR, 50HM, 50HW, 50HE | 50 | Not specified in company record | 1995–2003 | 6H4-W0093-02 / 6H4-W0093-03 / 6H4-W0093-04 |
| Nissan/Tohatsu | M60C, 3-cylinder | 60 | 2-Stroke | Not specified in company record | 3F3-87122-1 / 3F3-87122-0 / 3F3871220 |
| Nissan/Tohatsu | M70C, 3-cylinder | 70 | 2-Stroke | Not specified in company record | 3F3-87122-1 / 3F3-87122-0 / 3F3871220 |
Technical Specifications
- Product Type
- Carburetor repair seal kit
- Fitment Type
- Selected Yamaha, Nissan, and Tohatsu marine outboards
- Yamaha Coverage
- 25QEO, selected 40 HP models, and selected 50 HP models listed above
- Nissan/Tohatsu Coverage
- M60C and M70C 2-stroke, 3-cylinder outboards
- Yamaha OEM References
- 6H4-W0093-02, 6H4-W0093-03, 6H4-W0093-04
- Nissan/Tohatsu OEM References
- 3F3-87122-1, 3F3-87122-0, 3F3871220
- Aftermarket Reference
- Sierra 18-7768 for listed Yamaha applications
- Installation
- Replacement service part; installation should follow the engine service manual
- Manufacturer Status
- Aftermarket replacement
What’s in the Box
This listing is for one carburetor repair seal kit. The company catalog identifies it as a seal kit but does not provide a complete itemized component list or a confirmed quantity for every individual seal. Match the kit and your original carburetor against the applicable OEM reference before installation.
Installation Notes
- Disconnect the battery and shut off the fuel supply before beginning work. Allow the engine to cool completely.
- Place an absorbent cloth beneath the carburetor area and safely contain any fuel that may drain during disassembly.
- Photograph or label fuel lines, linkages, and hoses before removing them so they can be returned to their original positions.
- Remove the carburetor or carburetor assembly according to the engine service manual.
- Disassemble the carburetor on a clean work surface and retain reusable hardware in an organized manner.
- Clean suitable metal components with a marine-safe carburetor cleaner. Do not use wire or hard tools that could enlarge jets or damage sealing surfaces.
- Replace the applicable old seals and gaskets with the matching components from the kit. Do not force a seal into a groove if its size or profile does not match the original.
- Reassemble the carburetor using the service manual’s torque, float-height, adjustment, and synchronization specifications.
- Reinstall the carburetor, reconnect all fuel lines and linkages, inspect for leaks, and verify proper operation before returning the engine to service.
Troubleshooting & FAQ
How do I confirm that this kit fits my engine?
Compare your engine brand, exact model designation, horsepower, stroke type, and production year with the compatibility table. Also compare the OEM number stamped or listed for your original carburetor components. Model families can use different carburetor parts even when horsepower is similar.
Is this a complete carburetor?
No. This is a carburetor repair seal kit. It is supplied for servicing the applicable carburetor system and is not a complete replacement carburetor assembly.
Does the kit fit both Yamaha and Nissan/Tohatsu engines?
The company catalog lists separate Yamaha and Nissan/Tohatsu application groups for this product. Fitment is limited to the specific models and reference numbers shown above; it should not be assumed that every Yamaha, Nissan, or Tohatsu engine is compatible.
Can I use the kit to correct poor engine performance?
Worn seals can contribute to fuel leaks, air leaks, hard starting, rough idle, or inconsistent running. Carburetor symptoms can also result from blocked passages, incorrect adjustment, ignition faults, or fuel-system problems, so diagnose the engine before replacing parts.
Is this an OEM part?
No. This is an aftermarket replacement kit. The OEM numbers are provided only as application and cross-reference information.
Safety & Important Information
- Verify the exact engine model, year, stroke type, and OEM reference before ordering.
- Do not mix parts from unrelated carburetor models or assume that similar-looking seals are interchangeable.
- Work in a well-ventilated area away from flames, sparks, and other ignition sources.
- Use the manufacturer’s service manual for float settings, synchronization, torque values, and final adjustment procedures.
- Professional installation is recommended when carburetor disassembly or adjustment experience is limited.
About Sea Sierra
- Marine Parts Support — We provide replacement parts for outboard maintenance and repair applications.
- Application-Focused Listings — Product references and model information are provided to help you compare your original part before ordering.
- Aftermarket Value — Replacement components offer a practical alternative for servicing compatible marine engines.
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