Carburetor Rebuild Kit for Yamaha 40–50 HP 2-Stroke Outboards – Replaces 6H4-W0093-04-00
Carburetor Rebuild Kit for Yamaha 40–50 HP 2-Stroke Outboards – 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 for Yamaha 40–50 HP 2-Stroke Outboards – Rep...
Carburetor Rebuild Kit for Yamaha 40–50 HP 2-Stroke Outboards – 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 for Yamaha 40–50 HP 2-stroke outboards contains components for servicing all three carburetors on compatible Yamaha 2-stroke 40 HP and 50 HP outboard engines manufactured between 1989 and 2009.
The kit is listed as a replacement for Yamaha OEM part numbers 6H4-W0093-03-00 and 6H4-W0093-04-00, as well as Sierra 18-7768 and Mallory 9-37503.
- Designed for OEM-equivalent fit and function.
- Includes gaskets, O-rings, floats, needle valve assemblies, and related hardware for a complete three-carburetor overhaul.
- Helps restore proper fuel delivery and engine performance when worn or deteriorated carburetor components are the cause of the problem.
Part Number Matrix
Use the following references to compare OEM and aftermarket numbers before ordering.
| Brand | Part Number | Notes |
|---|---|---|
| Yamaha | 6H4-W0093-04-00 | Current OEM reference listed for this application |
| Yamaha | 6H4-W0093-03-00 | Earlier OEM reference listed for this application |
| Sierra | 18-7768 | Aftermarket interchange reference |
| Mallory | 9-37503 | Aftermarket interchange reference |
Engine & Model Compatibility
Confirm the exact engine model, year, and carburetor part number before ordering. The application information below covers the listed Yamaha 40–50 HP 2-stroke models.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | 40 HP 2-Stroke | 40 | 2-Stroke | 1989–2009 | 6H4-W0093-04-00 | Earlier reference: 6H4-W0093-03-00 |
| Yamaha | 50 HP 2-Stroke | 50 | 2-Stroke | 1989–2006 | 6H4-W0093-04-00 | Earlier reference: 6H4-W0093-03-00 |
| Yamaha | P40 | 40 | 2-Stroke | 1989–2009 | 6H4-W0093-04-00 | Earlier reference: 6H4-W0093-03-00 |
| Yamaha | C40 | 40 | 2-Stroke | 1989–2009 | 6H4-W0093-04-00 | Earlier reference: 6H4-W0093-03-00 |
| Yamaha | P50 | 50 | 2-Stroke | 1989–2006 | 6H4-W0093-04-00 | Earlier reference: 6H4-W0093-03-00 |
| Yamaha | C50 | 50 | 2-Stroke | 1989–2006 | 6H4-W0093-04-00 | Earlier reference: 6H4-W0093-03-00 |
| Yamaha | PRO50 | 50 | 2-Stroke | 1989–2006 | 6H4-W0093-04-00 | Earlier reference: 6H4-W0093-03-00 |
Technical Specifications
- Product Type
- Carburetor repair kit
- Application
- Yamaha 40–50 HP 2-stroke outboard engines with three carburetors
- Installation
- Replacement service parts for the listed carburetor applications
- Fuel Type
- Gasoline
- Kit Contents
- Components for servicing three carburetors, including floats, gaskets, O-rings, needle valve assemblies, clips, pins, and screws
- Package Dimensions
- 18 × 15 × 3 cm
- Package Weight
- 40 g (0.09 lb)
- Warranty
- 1 year
What's in the Box
This kit includes components for servicing all three carburetors on compatible engines.
- 1 × Gasket (6H4-14198-09-00)
- 3 × Cap (679-14966-00-00)
- 3 × Needle Valve Assembly (6H3-14590-01-00)
- 3 × Clip (633-14159-00-00)
- 3 × Pin, Float (676-14186-00-00)
- 3 × Float (6G1-14985-00-00)
- 3 × Pin, Float Arm (688-14548-00-00)
- 3 × O-Ring (6G1-14984-00-00)
- 3 × Screw, With Washer (97980-04114-00)
- 3 × O-Ring (93210-04230-00)
- 3 × Gasket (663-14126-00-00)
- 3 × Gasket (688-14126-00-00)
- 3 × Screw, Pilot (692-14923-00-00)
- 3 × O-Ring (93210-15M52-00)
Installation Notes
- Shut off the fuel supply and safely disconnect the fuel line from the carburetors.
- Remove the carburetors from the engine intake manifold, carefully noting linkage and hose connections.
- Disassemble one carburetor at a time to avoid mixing parts. Lay out each component in order.
- Clean reusable metal parts with a suitable carburetor cleaner. Do not soak rubber or plastic components.
- Inspect non-replaceable components for wear, damage, corrosion, or blockage.
- Install the new gaskets, seals, O-rings, needle valve assemblies, floats, and related hardware supplied in the kit.
- Set float height according to the specifications in the applicable engine service manual before closing the bowl.
- Reassemble each carburetor, ensuring that screws are correctly tightened and moving parts operate smoothly.
- Repeat the process for the remaining carburetors.
- Reinstall the carburetors and securely reconnect all linkages and fuel lines.
- Prime the fuel system and check carefully for leaks before starting the engine. Synchronize and adjust the carburetors as required by the service manual.
Troubleshooting & FAQ
How do I know if this kit fits my engine?
Compare your engine brand, model, horsepower, stroke, year, and carburetor part number with the application information and part number matrix above. If the original carburetor or service manual identifies a different part number, verify compatibility before ordering.
Does this kit rebuild all of the carburetors on my engine?
Yes. The listed contents are supplied in quantities intended to service all three carburetors on the specified Yamaha 3-cylinder applications.
What are the signs that a carburetor needs rebuilding?
Common symptoms include difficult starting, rough idle, low-speed stalling, hesitation or sputtering during acceleration, excessive smoke, poor fuel economy, and fuel leakage around the carburetor.
How often should outboard carburetors be rebuilt?
Service intervals depend on usage, fuel quality, storage conditions, and the condition of the carburetors. Inspection or rebuilding may be necessary after extended storage, contaminated fuel, or noticeable performance problems.
Is this an OEM kit?
No. This is an aftermarket replacement kit intended for the listed applications and reference numbers. It is not manufactured by Yamaha.
Is professional installation necessary?
A skilled DIY mechanic can perform the work with the applicable service information and tools. Professional installation is recommended when carburetor synchronization, float-height adjustment, or troubleshooting is required.
How quickly will the order ship?
Typical transit time is 5–15 days. Standard shipping is free, and expedited options may be available at checkout depending on destination.
What warranty and return coverage applies?
The kit is covered by a 1-year warranty against manufacturing defects under normal use. Returns are accepted within the applicable standard return window when the product is unused and in its original condition. Contact support with your order details for assistance.
Safety & Important Information
- Verify the engine model, year, stroke, carburetor configuration, and reference number before ordering.
- Compare the supplied components with the original parts before installation. Do not install parts that differ from the required application.
- This is an aftermarket replacement kit, not an OEM Yamaha component.
- Work in a well-ventilated area away from flames and ignition sources, and follow the engine manufacturer's service and safety instructions.
- Professional installation is recommended when synchronization or adjustment procedures are required.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered for dependable service in real-world conditions.
- Fast Global Fulfillment — Free standard delivery is available to most regions, with typical transit of 5–15 days.
- Manufacturer-Direct Value — Competitive pricing with attention to materials and quality control.
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