Miller Electric 300 P manual Engine Speed No Load, Rpm max 62.6 Hz 1250 rpm 41.6 Hz

8-7. Adjusting Engine Speed On Models With Automatic Idle (Optional)

1

2

3

Engine Speed

(No Load)

1880 rpm max

(62.6 Hz)

1250 rpm

(41.6 Hz)

4

.To prevent solenoid

damage, be sure a 1/8 in (3 mm) gap exists be- tween the engine low speed screw and throttle lever when the solenoid is held in the energized position.

Engine Speed Adjustment

After tuning engine, check en- gine speed with tachometer or frequency meter. See table for proper no load speed. If neces- sary, adjust speed as follows:

Start engine and run until warm.

Turn Process/Contactor switch to Stick − Weld Terminals Al- ways On position.

1Throttle Rod / Plunger

2Lock Nut

3Rubber Boot

4Adjustment Screw

Adjustment screw is not used to adjust engine speed when auto- matic idle option is installed. However, it must be at least 1/8 in (3 mm) away from the throttle arm when engine is running at idle rpm.

Unhook rubber boot from the so- lenoid housing but leave con- nected to plunger.

Loosen lock nut. Place Engine Control Switch in Auto position.

Turn throttle rod and plunger un- til engine runs at idle speed. Tighten lock nut.

Hook rubber boot back onto so- lenoid housing.

.Be sure solenoid plunger

pulls all the way in (“bot- toms”) when energized.

Weld/Power Speed Adjust- ment

.Weld/power speed adjust-

ment must be done by the engine manufacturer’s fac- tory authorized service agent.

Tampering with adjustments other than shown may affect engine warranty.

YStop engine.

803 563-G

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