Air Cleaner - Thermostatic: Description

All carbureted models are equipped with a Thermostatic Air Cleaner. It is equipped with an air control valve inside the snorkel which allows either heated exhaust shroud air or cooler ambient air into the carburetor, depending on valve position.

Valve position is controlled by a bi-metallic sensor located at hinge of control valve on Colt models. On other models, a vacuum motor which responds to a bi-metallic sensor (located inside air cleaner housing) controls valve position.