This manual introduces the features and use of O.S. TYPE 2B, 2CA, 2CB & 2H automatic carburetor.
This manual provides instructions for the O.S. Type 2B, 2CA, 2CB, and 2H automatic carburettors. It explains how the automatic mixture control device works to ensure a correctly balanced fuel and air mixture at all throttle settings, eliminating the need for an airbleed. The document details the function of the carburettor under average operating conditions and advises that it normally functions satisfactorily as factory set.
| Idle Speed Range | 2,500 and 3,000 r.p.m. |
|---|---|
| Rotor Hole Opening | 0.5 mm (0.02 in.) |
| Mixture Screw Adjustment | 5 ~ 10° turn |
Turn the Throttle Rotor Set-Screw counter-clockwise to reduce the throttle opening if the engine runs too fast.
Dismantle the parts, clean the nozzle fuel inlet and carburettor body with clean kerosene or alcohol, and reassemble.