Automatic choke adjustment, Automatic choke adjustment c – Generac Power Systems IM Series User Manual

Page 27

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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.