Miller Electric Big Blue 302P manual Engine Speed No Load, Rpm max 61.6 Hz 1250 rpm 41.6 Hz

9-6. Adjusting Engine Speed On Models With Automatic Idle (Optional)

Engine Speed

(No Load)

1850 rpm max

(61.6 Hz)

1250 rpm

(41.6 Hz)

3

4

If necessary, move linkage to other hole in bracket or move cotter pin to other hole in throttle arm to set idle speed correctly.

After tuning engine, check engine speed with tachometer or frequency meter. See table for proper no load speed. If necessary, adjust speed as follows:

Start engine and run until warm.

On CC models, place Stick/TIG switch in Stick position.

On CC/CV models, turn Process/ Contactor switch to Stick − Elec- trode Hot position.

Idle Speed Adjustment

1Throttle Rod/Plunger

2Locknut

Loosen locknut. Place Engine Con- trol switch in Run/Idle position.

Turn throttle rod and plunger until engine runs at idle speed. Tighten locknut.

.Be sure solenoid plunger pulls all the way in (“bottoms”) when energized.

.If necessary, move linkage to other hole in bracket or move cotter pin to other hole in throttle arm to set idle speed correctly.

Weld/Power Speed Adjustment

3Engine Weld/Power Speed Adjustment Screw

4Locknut

Place Engine Control switch in Run position.

Loosen locknut. Turn screw until en- gine runs at weld/power speed. Tighten locknut.

.Do not set engine speed higher than specified.

YStop engine.

2

1

802 490 / 802 538-A

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