Figure 4-8. Engine Speed Adjustments
4-9.8.1
Idle Speed Adjustment
a.
Start the engine as outlined in paragraph 4-8.3.
b.
Place the Weld/Power switch in the POWER position.
c.
Rotate the FINE AMPERAGE control to 100.
d.
Ensure that the speed control lever does not contact the speed control plunger during the following
adjustment:
Loosen the idle speed locking nut. Rotate the knurled adjustment nut until 1860 rpm is obtained.
Tighten the locking nut.
4-9.8.2
Weld Speed Adjustment
a.
Shut down the engine.
b.
Remove the lead seal from the weld speed adjustment nut.
c.
Press the plunger to the bottom of the throttle solenoid and check for 1/8 1/16 inch (3.2 ± 1.6 mm)
stretch in throttle spring. If adjustment is necessary, loosen the appropriate locking nut on the plunger
and rotate the remaining locking nut to obtain the proper distance.
d.
Start the engine as outlined in paragraph 4-8.3.
e.
Place the Weld/Power switch in the WELD position.
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