Carburetor Rebuild Kit – Fits Yamaha, Mercruiser, Tohatsu 75-90 HP (Replaces 6H1-W0093-01-00)
Carburetor Rebuild Kit – Fits Yamaha, Mercruiser, Tohatsu 75-90 HP (Replaces 6H1-W0093-01-00) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Product Details
This Carburetor Rebuild Kit – Fits Yamaha, Mercruiser, Tohatsu 75-90 HP (Replaces 6H1-W0093-01-00) provides the essential components to restore carburetor function on a range of outboard engines. It is designed for Yamaha 75-90 HP 2-stroke models (including C75, E75, C85, and early 90 HP units), Mercury/Mercruiser applications compatible with 84475M and 8M0175364, and Tohatsu 25-30 HP motors using part number 346-87122-0.
It serves as a direct interchange for Yamaha 6H1-W0093-01-00/6H1-W0093-00-00, Mercruiser 84475M/8M0175364, Tohatsu 346-87122-0/346871220M, and Sierra 18-7291.
- Engineered for single carburetor applications.
- Allows for a direct replacement installation with no modifications required.
- Kit contains the necessary parts for a standard carburetor overhaul.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 6H1-W0093-01-00 |
| Yamaha | 6H1-W0093-00-00 |
| Mercruiser | 84475M |
| Mercruiser | 8M0175364 |
| Tohatsu | 346-87122-0 |
| Tohatsu | 346871220M |
| Sierra | 18-7291 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Yamaha, this kit is intended for early model 2-stroke engines from 75 to 90 HP.
For Mercury, compatibility is noted for applications referencing part number 84475M, including certain 40 HP models.
For Tohatsu, this kit fits M25 and M30 model outboard motors.
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Yamaha | C75 | 75 | 2-Stroke | 6H1-W0093-01-00 | Early model |
| Yamaha | E75 | 75 | 2-Stroke | 6H1-W0093-01-00 | Early model |
| Yamaha | C85 | 85 | 2-Stroke | 6H1-W0093-01-00 | Early model |
| Yamaha | CV85 | 85 | 2-Stroke | 6H1-W0093-01-00 | Early model |
| Yamaha | 90 | 90 | 2-Stroke | 6H1-W0093-01-00 | Early model |
| Mercury | 40 | 84475M | As referenced by MarineSpareParts | ||
| Tohatsu | M25 | 25 | 346-87122-0 | ||
| Tohatsu | M30 | 30 | 346-87122-0 |
Technical Specs
- Product Type
- Carburetor Rebuild Kit
- Installation
- Direct replacement
- Fuel Type
- Gasoline
- Dimensions
- 2.0" L x 4.5" W x 5.0" H
- Weight
- 119 g (4.2 oz)
- Other Technical Attributes
- Single carburetor application
Installation Notes
- Disconnect the battery and fuel lines, ensuring the work area is well-ventilated and free of open flames or sparks.
- Carefully remove the carburetor assembly from the engine. It may be helpful to label vacuum and fuel hoses before removal.
- Disassemble the carburetor on a clean workbench, taking photos as you go to remember component placement.
- Clean all reusable metal parts thoroughly with a suitable carburetor cleaner. Do not soak rubber or plastic parts in harsh solvents.
- Carefully remove all old gaskets, jets, and seals. Compare them with the new parts from the kit to confirm a correct match.
- Install the new components from the kit in the reverse order of disassembly. Ensure O-rings and seals are properly seated.
- If the float is adjustable, set the float height according to the engine manufacturer's specifications.
- Reassemble the carburetor and reinstall it on the engine, tightening all mounting bolts to the specified torque.
- Reconnect fuel lines and the battery. Prime the fuel system if necessary.
- Start the engine and carefully check for any fuel leaks. Once confirmed leak-free, adjust the idle speed and mixture screws as needed for smooth operation.
Troubleshooting & FAQ
How do I confirm this kit fits my specific engine?
The most reliable method is to match your existing OEM part number to the equivalents listed in our Part Number Matrix. Additionally, check your engine's model, HP, and stroke against the Engine & Model Compatibility table. Do not purchase if your part number or model is not explicitly listed.
Will this kit fix poor engine performance like bogging or rough idling?
A faulty or clogged carburetor is a common cause of performance issues. This rebuild kit replaces typical wear items like gaskets, needles, and seals, which can resolve problems like rough idling, stalling, poor acceleration, and hesitation.
What are the signs my carburetor needs to be rebuilt?
Common symptoms include difficulty starting the engine, fuel leaks from the carburetor body, black smoke from the exhaust, an engine that floods easily, poor acceleration, and a sudden increase in fuel consumption.
How often should a marine carburetor be rebuilt?
Service intervals depend on hours of use, fuel quality (especially with ethanol blends), and off-season storage conditions. As a general guideline, consider a rebuild every 2-3 seasons or whenever performance issues arise.
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.
Payment & Security
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