Adjusting Engine Speed On Standard Models - Miller PRO 300 Owner's Manual

8-7. Adjusting Engine Speed On Standard Models

Engine Speed
(No Load)
Weld/Power
RPM (Hz)
1850 (61.7)
Maximum
3
2
1
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 or frequen-
cy meter. See table for proper no
load speed. If necessary, adjust
speed as follows:
Start engine and run until warm.
Turn Process/Contactor switch to
Weld Terminals Always On − Stick
position.
1 Lock Nut
2 Adjustment Screw
Loosen nut. Turn screw until engine
runs at weld/power speed. Tighten
nut.
.
Do not set engine speed higher
than specified.
3 Engine Stop Lever
Y Stop engine.
Close door.
Tools Needed:
803 563
OM-4422 Page 39