Carburetor Rebuild Kit – Fits Yamaha 40-50 HP 2-Stroke (Replaces 6H4-W0093-04-00)
Carburetor Rebuild Kit – Fits Yamaha 40-50 HP 2-Stroke (Replaces 6H4-W0093-04-00) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
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Carburetor Rebuild Kit – Fits Yamaha 40-50 HP 2-Stroke (Replaces 6H...
Carburetor Rebuild Kit – Fits Yamaha 40-50 HP 2-Stroke (Replaces 6H4-W0093-04-00) is backordered and will ship as soon as it is back in stock.
Product Details
This comprehensive Carburetor Rebuild Kit – Fits Yamaha 40-50 HP 2-Stroke Outboards contains all the necessary components to service all three carburetors on compatible Yamaha 2-Stroke 40 HP and 50 HP outboard engines manufactured between 1989 and 2009.
It serves as a direct replacement for Yamaha OEM parts 6H4-W0093-03-00 and 6H4-W0093-04-00, as well as Sierra 18-7768 and Mallory 9-37503.
- Designed for direct OEM-equivalent fit and function.
- Includes all gaskets, O-rings, floats, and needle valves for a complete 3-carburetor overhaul.
- Restores proper fuel delivery and engine performance.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket suppliers.
| Brand | Part Number | Notes |
|---|---|---|
| Yamaha | 6H4-W0093-04-00 | Current OEM Part |
| Yamaha | 6H4-W0093-03-00 | Superseded by 6H4-W0093-04-00 |
| Sierra | 18-7768 | Aftermarket Interchange |
| Mallory | 9-37503 | Aftermarket Interchange |
Engine & Model Compatibility
Confirm your engine model and year in the table below to ensure proper fitment.
This carburetor rebuild kit is confirmed to fit the following Yamaha outboard models:
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | 40HP 2-Stroke | 40 | 2-Stroke | 1989–2009 | 6H4-W0093-04-00 | Supersedes 6H4-W0093-03-00 |
| Yamaha | 50HP 2-Stroke | 50 | 2-Stroke | 1989–2006 | 6H4-W0093-04-00 | Supersedes 6H4-W0093-03-00 |
| Yamaha | P40 | 40 | 2-Stroke | 1989–2009 | 6H4-W0093-04-00 | Supersedes 6H4-W0093-03-00 |
| Yamaha | C40 | 40 | 2-Stroke | 1989–2009 | 6H4-W0093-04-00 | Supersedes 6H4-W0093-03-00 |
| Yamaha | P50 | 50 | 2-Stroke | 1989–2006 | 6H4-W0093-04-00 | Supersedes 6H4-W0093-03-00 |
| Yamaha | C50 | 50 | 2-Stroke | 1989–2006 | 6H4-W0093-04-00 | Supersedes 6H4-W0093-03-00 |
| Yamaha | PRO50 | 50 | 2-Stroke | 1989–2006 | 6H4-W0093-04-00 | Supersedes 6H4-W0093-03-00 |
Technical Specs
- Product Type
- Carburetor Repair Kit
- Installation
- Direct OEM replacement
- Fuel Type
- Gasoline
- Kit Contents
- Includes float assembly, gaskets, O-rings, needle valve assembly, clips, pins, and screws for three carburetors
- Package Dimensions
- 18 × 15 × 3 cm
- Package Weight
- 40 g (0.09 lb)
- Warranty
- 1 Year
What’s in the Box
This kit includes all components required to service all 3 (THREE) carburetors on compatible engines.
- 1 x Gasket (6H4-14198-09-00)
- 3 x Cap (679-14966-00-00)
- 3 x Needle Valve Assembly (6H3-14590-01-00)
- 3 x Clip (633-14159-00-00)
- 3 x Pin, Float (676-14186-00-00)
- 3 x Float (6G1-14985-00-00)
- 3 x Pin, Float Arm (688-14548-00-00)
- 3 x O-Ring (6G1-14984-00-00)
- 3 x Screw, With Washer (97980-04114-00)
- 3 x O-Ring (93210-04230-00)
- 3 x Gasket (663-14126-00-00)
- 3 x Gasket (688-14126-00-00)
- 3 x Screw, Pilot (692-14923-00-00)
- 3 x O-Ring (93210-15M52-00)
Installation Notes
- Shut off the fuel supply and safely disconnect the fuel line from the carburetors.
- Carefully remove the carburetors from the engine intake manifold. Note the linkage and hose connections.
- Disassemble one carburetor at a time to avoid mixing parts. Lay out all components in order.
- Thoroughly clean all metal parts with a quality carburetor cleaner. Do not soak rubber or plastic parts.
- Carefully inspect all non-replaceable components for wear or damage.
- Using the new kit components, replace the old gaskets, seals, O-rings, needle valve, and float assembly.
- Ensure the float height is set to your engine's service manual specifications before closing the bowl.
- Reassemble the carburetor, ensuring all screws are torqued correctly and moving parts operate smoothly.
- Repeat the process for the remaining carburetors.
- Reinstall the carburetors onto the engine, reconnecting all linkages and fuel lines securely.
- Prime the fuel system and check for leaks before starting the engine. Adjust idle mixture and speed as needed.
Troubleshooting & FAQ
How do I know if this kit fits my engine?
This kit is designed for Yamaha 40-50 HP 2-Stroke outboards made from 1989–2009. The most reliable way to confirm fitment is to check the part number on your existing carburetors or consult your service manual. Cross-reference your part numbers with those in our Part Number Matrix.
Does this kit rebuild all carburetors on my engine?
Yes, this is a complete kit containing all the necessary parts to rebuild all three carburetors on the specified Yamaha 3-cylinder engines.
What are the signs of a carburetor that needs a rebuild?
Common symptoms include difficulty starting, rough idling, stalling at low speeds, engine hesitation or sputtering on acceleration, black smoke from the exhaust, and fuel leaks from the carburetor body.
How often should I rebuild my outboard's carburetors?
Rebuild intervals depend on usage, fuel quality, and storage habits. It is good practice to rebuild every 2-3 years for preventative maintenance, or immediately if you notice performance issues, especially after long-term storage or if fuel was left in the bowls.
What's the difference between this kit and the OEM version?
This is an aftermarket kit engineered to meet or exceed OEM specifications for fit, form, and function. The primary difference is that it is not produced by the original engine manufacturer, allowing for a more competitive price point without sacrificing quality.
Is professional installation necessary?
While a skilled DIY mechanic can perform the rebuild, professional installation is recommended. Carburetor synchronization and fine-tuning are often required after a rebuild to ensure optimal engine performance and safety.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
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