ROCHESTER Models M & MV Single Barrel: Description

Single barrel downdraft carburetor with manual choke (M) or automatic choke (MV). Carburetors have throttle operated metering rod with vacuum operated power piston control (throttle drive rod engages slot in power piston so that piston can lift rod up in jet for full power operation). Idle air vent is located on bowl cover and is operated by a tang on accelerating pump lever. A hot idle compensator valve is located under cover on throttle lever side of carburetor. Automatic choke carburetors have diaphragm type vacuum break assembly located under cover on side of air horn and linked directly to choke valve. Automatic choke is separate well type mounted in manifold and linked to choke valve lever by adjustable rod.