6-5. Adjusting Engine Speed
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5
4
3
Top View
2200 ± 50 rpm
3700 ± 50 rpm
2 
After tuning engine, check engine speeds with a tachometer (see table). If necessary, adjust speeds as follows:
Start engine and run until warm. Turn Fine Adjust control to 10.
Idle Speed Adjustment
Move Engine Control switch to Run/Idle position.
1Throttle Solenoid
2Mounting Screws
3Idle Speed Screw
Loosen mounting screws. Adjust solenoid position so engine runs at idle speed. If necessary, back out idle speed screw so solenoid can be moved to correct position. Tighten mounting screws. Be sure solenoid linkage works smoothly.
Turn idle speed screw for fine ad- justments.
Weld/Power Speed Adjustment
Move Engine Control switch to Run position.
4Weld/Power Speed Adjust- ment Nut
5Lock Nut
Loosen lock nut. Turn adjustment nut until engine runs at weld/power speed. Tighten lock nut.
YStop engine.
Tools Needed:
1/4, 3/8 in
Ref.