Sierra 18-7749 Carburetor Kit for Weber 9661 Carburetor, Mercruiser 5.7L Alpha 350 V-8 1993-1994

The Sierra 18-7749 Carburetor Kit is a rebuild kit engineered to restore a Weber 9661 carburetor to proper operating condition. It is built to fit Weber carburetors and is designed to meet or exceed the quality of the original equipment part it replaces, making it a dependable choice for restoring fuel metering, idle quality, and throttle response on the carburetor it services.

This kit corresponds to the 5.7L Alpha 350 cubic inch V-8 engine covered under beginning serial number F000455 through ending serial number F273497, where the original carburetor part number is 3310-805484A1 and the carburetor code/model is 9661 Weber. Rebuilding with the correct kit ensures the gaskets, seals, and internal components are matched to this specific carburetor rather than a generic substitute, which helps preserve a proper air/fuel seal and consistent engine performance after installation.

Each kit is manufactured with a machined exterior finish and is packaged to supply the parts needed for a complete carburetor rebuild on the applicable Weber 9661 unit. Because carburetor kits are matched to a specific carburetor code and serial number range, confirming the original carburetor part number and serial number on the engine before ordering helps ensure the correct kit is purchased.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-7749
• Product Type: Carburetor Kit
• Fits Carburetor Code/Model: 9661 Weber
• Original Carburetor Part Number: 3310-805484A1
• Engine/Drive Fitment: 5.7L Alpha 350/V-8
• Model Years: 1993-1994
• Beginning Serial Number: F000455
• Ending Serial Number: F273497
• Exterior Finish: Machined
• Product Dimensions: 1.75 x 6.25 x 7 inches
• Weight: 0.21 pounds
• UPC: 808282244712

Fitment

• 5.7L Alpha 350/V-8, model years 1993-1994, serial number range F000455 to F273497

Replaces (OEM)

• Carter/Weber 9661
• Carter/Weber 9770
• Carter/Weber 9781
• Carter/Weber 9770SA
• Carter/Weber 9781S
• Mallory 9-37640
• Mercruiser 809065
• Mercruiser 823728
• Mercruiser 835076
• Mercruiser 8M0120192
• Mercruiser 811531

Frequently Asked Questions

What is the Sierra 18-7749 Carburetor Kit for? It is a rebuild kit for the Weber 9661 carburetor used on the 5.7L Alpha 350/V-8 engine, covering the serial number range F000455 to F273497, and is built to restore the carburetor to proper operating condition.

Will the 18-7749 kit fit my engine? The 18-7749 kit is matched to engines with the original carburetor part number 3310-805484A1 and carburetor code 9661 Weber, on the 5.7L Alpha 350/V-8 covering serial numbers F000455 through F273497. Confirming the original carburetor part number and engine serial number is the reliable way to verify fitment.

What OEM part numbers does the 18-7749 kit cross-reference? The Sierra 18-7749 is interchangeable with Carter/Weber 9661, 9770, 9781, 9770SA, and 9781S, Mallory 9-37640, and Mercruiser 809065, 823728, 835076, 8M0120192, and 811531.

How much does the 18-7749 carburetor kit weigh? The Sierra 18-7749 Carburetor Kit weighs 0.21 pounds.

What are the dimensions of the carburetor kit packaging? The 18-7749 carburetor kit measures 1.75 x 6.25 x 7 inches.

Is the Sierra 18-7749 kit genuine OEM or aftermarket? The 18-7749 is a Sierra-brand aftermarket carburetor kit engineered to meet or exceed the quality of the original equipment carburetor components it replaces, rather than a Mercruiser or Weber OEM part.

What finish does the kit's exterior have? The components in the Sierra 18-7749 kit have a machined exterior finish.

Does the 18-7749 kit work with a Carter carburetor as well as a Weber? Yes, the 18-7749 kit is interchangeable with Carter/Weber-coded units 9661, 9770, 9781, 9770SA, and 9781S in addition to the original Weber 9661 application.

What serial number range does the 18-7749 kit cover? This kit applies to the engine serial number range beginning at F000455 and ending at F273497 for the 5.7L Alpha 350/V-8.

What is the original carburetor part number this kit services? The 18-7749 kit is built for carburetors with original part number 3310-805484A1, carried under carburetor code 9661 Weber.