ENGINE TUNE -UP - Carburetor 2 -1 1 CARBURETOR Fig. 2-37 LOOSENESS and OPERATIONAL CHECK ~ 1. The various se t screw , plugs and union bol ts shou ld be in properly tightened and correct ly installed state. 2. The links shou ld be free from ex cess ive wear, the snap rings (ring pins) shou ld all be pres ent , and th e throttl e shaft should not be wo rn. Fig. 2-38 Check th rottle valve fu ll open. ~ 3 . The throttl e valve should open fully when the accelerator pedal is stepped all the way down. Fig. 2-39 Check chok e valve act ion . ~ 4 . ( 1) Choke valve should be fu lly closed when the choke butt on is fully pulled. (2) At this time, open choke valve with finger and release it.
It should close fully . Fig. 2·40 Check the accelerating pump operation. ~ 5 . Gasoline should shoot out w ith good force fro m the jet when the throttl e valve is opened.