G424 Service Manual Gasoline Fuel System71
6EN0859
6EN1889
6E0860
Inspection and Adjustment After Reassembly
1. Fast Idle Opening
(1) Move the choke lever to place the choke valve in fully
closed position.
(2) Measure the clearance “A” (primary throttle valve to
throttle bore).
NOTE: Refer to the table in SERVICE SPECIFICATIONS for
the clearance.
(3) If the clearance “A” is out of specifications, adjust to the
standard value by the fast idle adjusting screw.
Screw direction Clearance Remarks
of rotation
Clockwise Increases Fast idle speed
increases
Counterclockwise Decreases Fast idle speed
decreases
2. Choke valve Operation
(1) With the choke valve lever set to its full position, move the
choke valve with a finger to make sure that the choke
valve shaft has not an excessive play and the valve
moves smoothly without sticking.
(2) If the choke valve can not be moved smoothly, clean the
choke valve and the area around it.
(3) If the play of the choke valve shaft is excessive, replace
the float chamber cover.
Choke lever
Choke shaft
Primary throttle
valve
Clearance “A”
(drill bit diameter)
Fastidle
adjusting
screw
To Next Page
Loading...
Need help?
General
