Carburetor Rebuild Kit – Fits MerCruiser V8 350/5.7L and 7.4L Engines (Replaces 809064)
Carburetor Rebuild Kit – Fits MerCruiser V8 350/5.7L and 7.4L Engines (Replaces 809064) 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 MerCruiser V8 350/5.7L and 7.4L Engines (Replaces 809064) is designed for a wide range of MerCruiser V8 engines manufactured between 1990 and 1997, including the 350 MAG, 5.7L, 7.4L, 454 MAG, and 502 MAG models. It contains all essential components to restore your Weber 4-barrel carburetor to optimal performance.
This kit serves as a direct interchange for MerCruiser 809064, GLM 76140, Walker WK-19058, and Quicksilver 8M0120193.
- Installation Type: Direct replacement
- Application: Weber 4-Barrel Carburetors
- Included Essentials: Gaskets, seals, needle & seat assemblies, and a float height setting tool
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| MerCruiser | 809064 |
| GLM | 76140 |
| Walker | WK-19058 |
| Quicksilver | 8M0120193 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Model | Engine | Years | OEM Part No. | Carburetor Model | Notes |
|---|---|---|---|---|---|
| 5.7 MIE V8 | 5.7L | 1994 | 3310-806761A1 | 9665S WEBER | Serial Range: 0F025000-0F349299 |
| 5.7 MIE V8 | 5.7L | 1994 | 3310-806761A2 | 9665S WEBER | Serial Range: 0F025000-0F349299 |
| 5.7 MIE V8 | 5.7L | 1995 | 3310-806761A3 | 9665S WEBER | Serial Range: 0F349300-0F622099 |
| 5.7 MIE V8 | 5.7L | 1996–1997 | 3310-807262A2 | 4781S WEBER | Serial Range: 0F622100-0K999999 |
| 5.7L Alpha V8 | 5.7L | 1994–1995 | 3310-806761A3 | 9665S WEBER | Serial Range: 0F273498-0F600999 |
| 5.7LX (4 BBL) V8 | 5.7L | 1996–1997 | 3310-807262A2 | 9781S WEBER | Serial Range: 0F601000-0K999999 |
| 350 Magnum Alpha V8 | 5.7L | 1996–1997 | 3310-807262A2 | 9781S WEBER | Serial Range: 0F601000-0K999999 |
| 5.7 SKI V8 | 5.7L | 1993–1995 | 3310-806761A2 | 9665S WEBER | Serial Range: 0F025100-0F449999 |
| 5.7 SKI V8 | 5.7L | 1995 | 3310-806761A3 | 9665S WEBER | Serial Range: 0F450000-0F775199 |
| 350 MAG SKI V8 | 5.7L | 1991–1997 | 3310-807262A2 | 9781S WEBER | Serial Range: 0D505450-0K999999 |
| 350 MAG SKI V8 | 5.7L | 1997 | 3310-860371A1 | 9781S WEBER | Serial Range: 0K040400-0K999999 |
| 7.4L w/ Hurth V8 | 7.4L | 1992–1994 | 3310-806969A2 | 9780 WEBER | Serial Range: 0D715494-0F349999 |
| 7.4L MIE w/ Borg. Warner V8 | 7.4L | 1992–1994 | 3310-806969A3 | 9780 WEBER | Serial Range: 0D715494-0F349999 |
| 7.4L MIE V8 | 7.4L | 1995–1997 | 3310-806969A1 | 9780 WEBER | Serial Range: 0F350000-0K999999 |
| 7.4L Bravo I/II V8 | 7.4L | 1992–1994 | 3310-806969A2 | 9780 WEBER | Serial Range: 0D603118-0F351999 |
| 7.4L Bravo I/II V8 | 7.4L | 1995–1997 | 3310-806969A1 | 9780 WEBER | Serial Range: 0F352000-0K999999 |
| 7.4L Bravo III V8 | 7.4L | 1993–1996 | 3310-806755A2 | 9779 WEBER | Serial Range: 0D838819-0F800699 |
| 7.4L Bravo III V8 | 7.4L | 1996–1997 | 3310-806969A1 | 9780 WEBER | Serial Range: 0F800700-0K999999 |
| 454 MAG Bravo V8 | 7.4L | 1992–1994 | 3310-806755A1 | 9779 WEBER | Serial Range: 0D808069-0F304999 |
| 454 MAG Bravo V8 | 7.4L | 1995–1997 | 3310-806755A2 | 9779 WEBER | Serial Range: 0F305000-0K999999 |
| 502 MAG V8 | 8.2L | 1992–1993 | 3310-806971A1 | 9782 WEBER | Serial Range: 0D824589-0F114528 |
| 8.2L MIE V8 | 8.2L | 1990–1996 | 3310-806971A1 | 9782 WEBER | Serial Range: 0C878221-0F819619 |
Technical Specs
- Product Type
- Carburetor Rebuild Kit
- Installation
- Direct replacement
- Fuel Type
- Gasoline
- Application
- Weber 4-Barrel Carburetors
- Compatible Carburetors
- Weber 9665S, 9781S, 9780, 9779, 9782
- Product Dimensions
- 15.8cm L x 4.8cm W x 17.8cm H
What’s in the Box
- 1 x Flange gasket
- 1 x Bowl Cover gasket
- 1 x Venturi Cluster gaskets
- 1 x Pump Jet Housing gasket
- 1 x Accelerator Pump Assembly
- 1 x Check Ball
- 2 x Inlet needle and seat assembly and gaskets
- 1 x Fuel inlet gasket
- 1 x Float height setting tool
- 1 x Assortment of clips
- 1 x Illustrated instructions
Installation Notes
- Disconnect the battery and fuel line. Place rags to absorb any spilled fuel.
- Carefully remove the carburetor from the engine, noting all linkage and hose connections.
- Disassemble the carburetor on a clean bench, organizing all parts systematically.
- Clean all metal components with a quality carburetor cleaner. Do not soak rubber or plastic parts.
- Replace old gaskets, seals, and needle assemblies with the new components from the kit.
- Use the included float gauge to ensure the float height is set to the correct specification per the instructions.
- Reassemble the carburetor, ensuring all screws are tightened to the proper torque.
- Reinstall the carburetor onto the engine, reconnecting all linkages and fuel lines.
- Start the engine and adjust the idle speed and mixture screws as needed. Check for fuel leaks.
Troubleshooting & FAQ
How do I know if this is the right kit for my engine?
This kit is designed for a variety of MerCruiser V8 engines from 1990-1997. The most reliable way to confirm fitment is to match your engine model, year, and serial number range to our compatibility table. You can also verify by cross-referencing your carburetor's model number (e.g., 9665S, 9781S) with the compatible models listed in the Technical Specs.
What are common signs my carburetor needs a rebuild?
Symptoms include hard starting, rough idling, stalling, poor acceleration, black smoke from the exhaust (running rich), or visible fuel leaks. Over time, internal gaskets and seals can degrade, and passages can become clogged, leading to poor fuel metering.
Can I use this kit for a non-MerCruiser or non-Weber carburetor?
No, this kit is specifically designed for the Weber 4-barrel carburetors used on the MerCruiser engines listed in the compatibility chart. Using it on other carburetor models will likely result in improper fitment and poor engine performance.
What's the purpose of the float height setting tool?
The float height is a critical adjustment that controls the fuel level in the carburetor bowl. An incorrect level can cause the engine to run too rich or too lean. The included tool allows you to accurately set this height during reassembly, which is essential for proper engine function.
How often should a marine carburetor be rebuilt?
There is no fixed interval, as it depends on usage, fuel quality, and storage conditions. As a general guideline, a rebuild may be needed every 3-5 years for preventative maintenance, or sooner if you notice any performance issues.
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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