The problem is caused by a stuck or misadjusted throttle opener. When this happens, the throttle is not opened when engine is stopped and this would not allow the autochoke to come into action unless you have depressed the accelerator at least once..
Start engine and run till operating temp and with engine running, disconnect the throttle opener vacumn hose ( blue arrow ) and plug it. Engine idling should incrase to at least 1500 rpm, if it does not, adjust the throttle opener adjustment screw till the desired rpm is achieved.
Vacumn test the throttle opener diaphragm for leakages.
Saturday, August 15th, 2009 AT 7:03 AM