5. adjusting engine speed – Miller Electric Big Blue 502P User Manual

Page 32

OM-491 Page 28

7-5. Adjusting Engine Speed

802 229-A / Ref. 191 631-A

Y Stop engine and let cool.
Engine speed is factory set and

should not require adjustment. Af-

ter tuning engine, check engine

speed with tachometer. See table

for proper no load speed. If neces-

sary, adjust speed as follows:
1

Adjustment Screw

Lock Nut

Loosen nuts. Turn screws out sev-

eral turns.
3

Speed Lever

Start engine and move lever until

engine runs at weld/power speed.

Tighten adjustment screws and

lock nuts.

Do not set engine speed higher
than specified.

Y Stop engine.
Close door.

Tools Needed:

5/16 in

RPM (Hz)

Engine

Speed

(No Load)

Weld/Power

1850 (61)

Maximum