Generac Power Systems IM Series - Manual (Page 27)

Automatic Choke Adjustment
C
Check automatic choke operation and (if necessary)
adjust the choke as foiiows:-
a. Check Choke Operation:- Crank the engine whiie ob­
serving automatic choke operation, initiaily, the Choke
Soienoid shouid energize to dose choke for about 0.2 to
0.4 seconds and then de-energize for about 2 seconds to
open the choke. This open/ciose cycie shouid repeat it-
seif untii the engine starts and cranking is terminated.
b. Pre-Choke Adjustment:- With engine cold and Choke
Solenoid NOT actuated, check that carburetor choke
plate is about 1/8 Inch away from its full open position. If
necessary to obtain the desired setting, use needle nose
pliers to bend tip of BI-METAL.
c. Choke Solenoid Adjustment:- Loosen screws that
retain the CHOKE SOLENOID to its retaining bracket.
Slide the CHOKE SOLENOID in the slotted holes to ad­
just axial movement of the SOLENOID plunger. Adjust
the axial movement so that, with the carburetor choke
plate closed, the CHOKE SOLENOID plunger Is just bot­
tomed in the solenoid coil (plunger at full actuated posi­
tion). With choke plate closed and plunger bottomed in
the coil, tighten the two screws. Then, crank engine and
check choke operation.
25