Hygrade CV300 Carburetor Choke Thermostat

Carburetor Choke Thermostat for Rochester Carburetors

Hygrade CV300 is a carburetor choke thermostat built for Rochester carburetor applications on select Cadillac and Buick vehicles. It uses a male blade terminal with a single terminal connection for straightforward electrical hookup in the correct choke control circuit.

For restorations and repairs on 1975-1978 Cadillac models and 1978 Buick LeSabre and Regal applications, this choke thermostat supports proper cold-start choke operation in Rochester-equipped carburetion systems. Hygrade has supplied the automotive aftermarket since 1919, with coverage focused on carburetion service parts.

Key Features

• Carburetor choke thermostat for Rochester carburetor applications
• Male blade terminal design with 1 terminal
• Direct replacement style for select Cadillac and Buick carburetion systems
• Part number CV300 for catalog and service reference
• Cross-references Standard Ignition TH317 for the same application

Detailed Description

Hygrade CV300 is used in Rochester carburetor systems where choke temperature control is needed for reliable cold starts and stable warm-up behavior. It is listed for 1975-1978 Cadillac Commercial Chassis, DeVille, Eldorado, and Fleetwood models, plus 1978 Buick LeSabre and Regal applications with Rochester carburetors. If you are searching for a Rochester carburetor choke thermostat for a 1977 Cadillac DeVille, 1976 Cadillac Eldorado, or 1978 Buick Regal, CV300 matches the documented fitment.

This part number, CV300, is also referenced in interchange listings for service lookup and catalog matching. The terminal configuration is male, blade type, with one terminal connection.

What It Helps Address

• Hard cold starts caused by choke temperature control issues
• Choke plates that do not open at the proper warm-up rate
• Rough idle during initial engine operation
• Driveability problems on Rochester carburetor-equipped Cadillac and Buick vehicles
• Service replacement needs for carburetor choke thermostat failure

Installation Notes and Tips

Verify Rochester carburetor model numbers and the vehicle application notes before installation. Match the terminal style to the existing connector and confirm the choke thermostat location and linkage condition are correct. For best results, inspect the surrounding choke housing, wiring connection, and carburetor adjustment during service.

Quality Assurance

Hygrade is an established automotive aftermarket manufacturer with a long history in carburetion parts, supporting service coverage for classic vehicle applications. CV300 is cataloged for specific Cadillac and Buick Rochester carburetor fitments to help ensure application-specific replacement selection.