Elect Choke Thermostat

The Holley 45-230 electric choke thermostat is a precision carburetor control component engineered for vehicles equipped with Holley 4165, 4175, or 4360 carburetors. This electric choke assembly delivers reliable cold-start enrichment and automatic transition to lean-running operation as engine temperature rises, eliminating the guesswork of manual choke adjustment. Purpose-built for street, marine, and performance applications where consistent fuel mixture control directly impacts throttle response and engine reliability, the electric choke thermostat represents the modern solution to traditional mechanical choke management.

This electric choke thermostat operates via a heating element that responds to coolant temperature signals, automatically closing the choke butterfly valve during cold starts to rich the fuel mixture for reliable ignition and smooth idle. As coolant warms, the bimetallic sensing mechanism progressively opens the choke, leaning out the mixture and restoring fuel efficiency. The assembly includes a gasket seal designed to prevent vacuum leaks that compromise carburetor performance. The compact form factor—measuring 5 x 2.15 x 6.95 inches and weighing only 0.15 lbs—ensures a direct, low-profile fit within the existing carburetor cavity without modification to intake manifold or fuel system architecture.

Technicians and enthusiasts restoring or tuning Holley four-barrel carburetors will find this electric choke thermostat essential for vehicles transitioning from mechanical to automated choke control. Installation requires basic electrical connection to the vehicle's ignition circuit and coolant jacket access; no carburetor drilling or welding is necessary. This component is particularly valuable in marine engines, vintage muscle cars, and high-performance street machines where precise cold-start mixture control prevents hard starts and carburetor flooding while improving overall drivability and fuel economy once the engine reaches operating temperature.