Hygrade 381B Carburetor Repair Kit

Hygrade Carburetor Repair Kit for Rochester 4 bbl. Carbs

The Hygrade 381B carburetor repair kit is designed specifically for Rochester 4-barrel carburetors, including 4MC and 4MV types. This kit provides essential components to restore proper fuel delivery and carburetor function on select Buick and Pontiac models.

• Includes accelerator pump for improved throttle response
• Compatible with Rochester 4 bbl. carburetors, types 4MC and 4MV
• Flange base gasket and fuel inlet gasket included for proper sealing
• Needle and seat included to regulate fuel flow
• Comes with detailed instructions for accurate installation

Comprehensive Repair Components for Rochester Carburetors

The Hygrade 381B kit contains all necessary gaskets and components to address common wear points in Rochester 4 bbl. carburetors used on various Buick and Pontiac vehicles. While the float and throttle linkage clip are not included, the kit focuses on critical seals and the accelerator pump to ensure consistent fuel metering and throttle response. The included needle and seat help maintain proper fuel level control, reducing flooding or fuel starvation issues. This kit is ideal for restoring carburetor performance on models such as the Buick LeSabre, Riviera, and Pontiac Firebird.

Compatible Buick and Pontiac Models

• Buick Bonneville, LeSabre, Riviera, Skylark
• Pontiac Catalina, Firebird, Grand Prix, GTO, LeMans, Tempest
• Also fits Canadian models like Laurentian and Parisienne

Common Applications and Repair Uses

• Restores accelerator pump function for smooth throttle transitions
• Replaces worn gaskets to prevent fuel leaks and vacuum loss
• Addresses fuel inlet issues with new needle and seat components
• Improves carburetor sealing with included flange base gasket
• Helps resolve rough idling and hesitation related to carburetor wear

Installation Notes and Tips

Follow the included instructions carefully to ensure proper assembly and gasket placement. Inspect the carburetor body for damage or excessive wear before installation. Since the float and throttle linkage clip are not included, verify their condition separately. Proper cleaning of all carburetor parts prior to installation will improve repair results and longevity.

Quality Assurance and Warranty

Hygrade carburetor repair kits are manufactured to meet OEM specifications for reliable performance. The 381B kit components are designed for durability and precise fitment on Rochester 4 bbl. carburetors. Please refer to Hygrade’s warranty policy for coverage details.