Sierra 18-7665 Choke Thermostat - Replaces 809066 - Weber 4V Carburetors with Electric Choke

The Sierra 18-7665 is a choke thermostat built for the electric choke system on Weber 4-barrel (4V) carburetors used in marine engine applications. The choke thermostat regulates the electric choke plate as the engine warms, adjusting air/fuel mixture during cold starts and warm-up so the carburetor transitions smoothly to normal operation. Sierra 18-7665 carries a white housing finish and an adjustable design, allowing the choke setting to be tuned to the engine's starting characteristics. Its compact housing measures 2.25 inches deep by 2.25 inches wide by 1.25 inches high and the unit weighs 0.14 pounds. The Sierra 18-7665 directly replaces OEM number 809066 and is intended specifically for Weber 4V carburetors equipped with an electric choke, making it a straightforward drop-in replacement for a worn, sticking, or failed choke thermostat on this carburetor type.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-7665
• Replaces: 809066
• Fitment: Weber 4V Carburetors with electric choke
• Product Dimensions: 2.25 inches D x 2.25 inches W x 1.25 inches H
• Color: White
• Special Feature: Adjustable
• Weight: 0.14 pounds
• UPC: 808282277185

Fitment

• Weber 4V Carburetors with electric choke

Replaces (OEM)

• 809066

Frequently Asked Questions

What does the Sierra 18-7665 choke thermostat fit? The Sierra 18-7665 is designed for Weber 4V (4-barrel) carburetors equipped with an electric choke.

What OEM part number does the Sierra 18-7665 replace? It replaces OEM number 809066.

Is the Sierra 18-7665 choke thermostat adjustable? Yes, the 18-7665 has an adjustable design so the choke setting can be tuned to the engine's starting behavior.

What color is the Sierra 18-7665 choke thermostat? It has a white housing finish.

How much does the Sierra 18-7665 weigh? The 18-7665 choke thermostat weighs 0.14 pounds.

What are the dimensions of the Sierra 18-7665? The housing measures 2.25 inches deep by 2.25 inches wide by 1.25 inches high.

Will the 18-7665 work on a Rochester or Mercarb carburetor? No, the 18-7665 is built specifically for Weber 4V carburetors with an electric choke; Rochester and Mercarb 2V electric-choke applications use a different Sierra part number.

Is the Sierra 18-7665 a genuine Sierra part or aftermarket? The 18-7665 is a Sierra-branded choke thermostat, sold under Sierra part number 18-7665.

What is included when ordering the Sierra 18-7665? Ordering the Sierra 18-7665 gets you one choke thermostat unit for a Weber 4V electric-choke carburetor.

Can the Sierra 18-7665 replace a stuck or sticking choke thermostat? Yes, replacing a worn or sticking choke thermostat with the Sierra 18-7665 restores proper electric choke operation on Weber 4V carburetors.

Does the Sierra 18-7665 use electricity to operate the choke? Yes, the 18-7665 is built for the electric choke system on Weber 4V carburetors, not a manual choke setup.