OE Quality
60-Day Returns

Hygrade CV300 Carburetor Choke Thermostat
Hygrade CV300 Carburetor Choke Thermostat Overview
The Hygrade CV300 Carburetor Choke Thermostat is designed to provide reliable choke control for select Buick and Cadillac models. Engineered with a single male blade terminal, this thermostat ensures precise temperature regulation for optimal carburetor performance.
- Single male blade terminal for secure electrical connection
- Terminal quantity: 1 for straightforward installation
- Compatible with Buick and Cadillac carburetion systems
- Part number CV300 for easy identification and replacement
Technical Details and Compatibility
This carburetor choke thermostat features a male blade terminal type, which is common in many classic vehicle electrical systems. The single terminal design simplifies wiring and reduces installation complexity. The Hygrade CV300 is specifically compatible with Buick models such as LeSabre, Regal, and Commercial Chassis, as well as Cadillac models including DeVille, Eldorado, and Fleetwood. This ensures proper fitment and function within the air and fuel delivery system of these vehicles.
Applications and Problem Resolution
The CV300 thermostat is used to regulate the choke mechanism in carburetors, helping maintain the correct air-fuel mixture during engine warm-up. It addresses several common issues:
- Improper choke operation causing rough idling
- Difficulty starting engines in cold conditions
- Excessive fuel consumption due to choke malfunction
- Delayed engine warm-up times
- Inconsistent engine performance related to carburetor choke
Installation Notes and Tips
When installing the Hygrade CV300, ensure the male blade terminal is securely connected to the corresponding female connector to prevent electrical faults. Verify compatibility with your specific Buick or Cadillac model before installation. It is recommended to inspect the choke linkage and carburetor components for wear or damage during replacement to maintain overall system integrity.
Quality Assurance and Warranty
Hygrade manufactures the CV300 carburetor choke thermostat to meet industry standards for durability and performance. While specific warranty details may vary, Hygrade products typically come with a limited warranty against manufacturing defects. Always consult product documentation or the supplier for exact warranty terms.
| Brand | Hygrade |
|---|---|
| Part Number | CV300 |
| Terminal Gender | Male |
| Terminal Type | Blade |
This part fits 29 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 1978 | Buick | LeSabre | 3.8L | V6 | N/A | w/ Rochester Carb.; M4ME; 17055840-17055842, 17058240, 17058246, 17058540 |
| 1978 | Buick | Regal | 3.8L | V6 | N/A | w/ Rochester Carb.; M4ME; 17055840-17055842, 17058240, 17058246, 17058540 |
| 1978 | Buick | Regal | 3.8L | V6 | N/A | w/ Rochester Carb.; M2ME; 17055868, 17058192 |
| 1978 | Cadillac | Commercial Chassis | 7.0L | V8 | N/A | w/ Rochester Carb.; w/ Federal Emissions; M4ME; 17055833, 17058233, 17058532-17058533, 17058535, 17065250, 17065302 |
| 1978 | Cadillac | Eldorado | 7.0L | V8 | N/A | w/ Rochester Carb.; w/ Federal Emissions; M4ME; 17055833, 17058233, 17058532-17058533, 17058535, 17065250, 17065302 |
| 1977 | Cadillac | Commercial Chassis | 7.0L | V8 | N/A | w/ Rochester Carb.; M4ME; 17055130-17055134, 17055519, 17055554-17055555, 17055559, 17057230-17057235, 17057530, 17057533, 17067032 |
| 1977 | Cadillac | Commercial Chassis | 7.0L | V8 | N/A | w/ Rochester Carb.; M4MEA; 17055131-17055133, 17055554-17055555, 17057231-17057235 |
| 1977 | Cadillac | DeVille | 7.0L | V8 | N/A | w/ Rochester Carb.; M4ME; 17055130-17055134, 17055519, 17055554-17055555, 17055559, 17057230-17057235, 17057530, 17057533, 17067032 |
| 1977 | Cadillac | DeVille | 7.0L | V8 | N/A | w/ Rochester Carb.; M4MEA; 17055131-17055133, 17055554-17055555, 17057231-17057235 |
| 1977 | Cadillac | Eldorado | 7.0L | V8 | N/A | w/ Rochester Carb.; M4ME; 17055130-17055134, 17055519, 17055554-17055555, 17055559, 17057230-17057235, 17057530, 17057533, 17067032 |
| 1977 | Cadillac | Eldorado | 7.0L | V8 | N/A | w/ Rochester Carb.; M4MEA; 17055131-17055133, 17055554-17055555, 17057231-17057235 |
| 1977 | Cadillac | Fleetwood | 7.0L | V8 | N/A | w/ Rochester Carb.; M4ME; 17055130-17055134, 17055519, 17055554-17055555, 17055559, 17057230-17057235, 17057530, 17057533, 17067032 |
| 1977 | Cadillac | Fleetwood | 7.0L | V8 | N/A | w/ Rochester Carb.; M4MEA; 17055131-17055133, 17055554-17055555, 17057231-17057235 |
| 1976 | Cadillac | Commercial Chassis | 8.2L | V8 | N/A | w/ Rochester Carb.; M4ME; 17052931-17052932, 17054693-17054694, 17056230, 17056232, 17056530 |
| 1976 | Cadillac | Commercial Chassis | 8.2L | V8 | N/A | w/ Rochester Carb.; M4MEA; 17052931-17052932, 17054693-17054694, 17056230, 17056232, 17056530 |
| 1976 | Cadillac | DeVille | 8.2L | V8 | N/A | w/ Rochester Carb.; M4ME; 17052931-17052932, 17054693-17054694, 17056230, 17056232, 17056530 |
| 1976 | Cadillac | DeVille | 8.2L | V8 | N/A | w/ Rochester Carb.; M4MEA; 17052931-17052932, 17054693-17054694, 17056230, 17056232, 17056530 |
| 1976 | Cadillac | Eldorado | 8.2L | V8 | N/A | w/ Rochester Carb.; M4ME; 17052931-17052932, 17054693-17054694, 17056230, 17056232, 17056530 |
| 1976 | Cadillac | Eldorado | 8.2L | V8 | N/A | w/ Rochester Carb.; M4MEA; 17052931-17052932, 17054693-17054694, 17056230, 17056232, 17056530 |
| 1976 | Cadillac | Fleetwood | 8.2L | V8 | N/A | w/ Rochester Carb.; M4ME; 17052931-17052932, 17054693-17054694, 17056230, 17056232, 17056530 |
| 1976 | Cadillac | Fleetwood | 8.2L | V8 | N/A | w/ Rochester Carb.; M4MEA; 17052931-17052932, 17054693-17054694, 17056230, 17056232, 17056530 |
| 1975 | Cadillac | Commercial Chassis | 8.2L | V8 | N/A | w/ Rochester Carb.; M4ME; 17054694, 7045193, 7045230, 7045530, 7047500 |
| 1975 | Cadillac | Commercial Chassis | 8.2L | V8 | N/A | w/ Rochester Carb.; M4MEA; 7045193, 7045230, 7045530, 7047500 |
| 1975 | Cadillac | DeVille | 8.2L | V8 | N/A | w/ Rochester Carb.; M4ME; 17054694, 7045193, 7045230, 7045530, 7047500 |
| 1975 | Cadillac | DeVille | 8.2L | V8 | N/A | w/ Rochester Carb.; M4MEA; 7045193, 7045230, 7045530, 7047500 |
| 1975 | Cadillac | Eldorado | 8.2L | V8 | N/A | w/ Rochester Carb.; M4ME; 17054694, 7045193, 7045230, 7045530, 7047500 |
| 1975 | Cadillac | Eldorado | 8.2L | V8 | N/A | w/ Rochester Carb.; M4MEA; 7045193, 7045230, 7045530, 7047500 |
| 1975 | Cadillac | Fleetwood | 8.2L | V8 | N/A | w/ Rochester Carb.; M4ME; 17054694, 7045193, 7045230, 7045530, 7047500 |
| 1975 | Cadillac | Fleetwood | 8.2L | V8 | N/A | w/ Rochester Carb.; M4MEA; 7045193, 7045230, 7045530, 7047500 |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.