O.S. Carburetor 12F4(B) Speed T1202

Tower Stock# OSMG2402  •  Manufacturer Stock# 2AP81000
O.S. Carburetor 12F4(B) Speed T1202 (large view)
Notes from our tech department:
This is the 12F4-B Complete Slide Valve Carburetor
for the .12 O.S. Speed Tuned T1202 Touring Car Engine, OSMG1996.


Assembled and ready to install


12F4-B Complete Carburetor
5.5mm Diameter Reducer, OSMG2548
Rubber Gasket, OSMG6220


Carburetor Settings: NOTE carburetor is preset at factory and
requires only very small adjustments
Metering Needle, Flush with slide valve body
Throttle Stop Screw, Approximately 0.5mm visible from carb opening
Needle Valve, Approximately 2-1/2 turns open from fully closed
if engine stalls when warm, close needle valve in 15 increments
until engine runs smoothly

jxs 08/17/17



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