Adjusting Engine Speed (Robin-Powered Units) - Miller Bobcat 225 Owner's Manual

8-6. Adjusting Engine Speed (Robin-Powered Units)

OM-4434 Page 32
1
2
4
2200 − 2300 rpm
(36.6 − 38.3 Hz)
3675 − 3750 rpm
(61.3 − 62.5 Hz)
3
6
5
After tuning engine, check engine
speeds with a tachometer (see
table). If necessary, adjust speeds
as follows:
Start engine and run until warm.
Remove rear panel and air cleaner
to access idle speed adjustments.
Remove top cover to access weld/
power speed adjustments.
Idle Speed Adjustment
Move Engine Control switch to
Run/Idle position.
1 Throttle Solenoid
2 Mounting Screws
3 Idle Speed Screw
Loosen mounting screws. Adjust
solenoid position so engine runs at
idle speed. If necessary, back out
idle speed screw so solenoid can
be moved to correct position. Tight-
en mounting screws. Be sure sole-
noid linkage works smoothly.
Turn idle speed screw for fine
adjustments.
Weld/Power Speed Adjustment
Move Engine Control switch to Run
position.
4 Jam Nut
5 Lock Nut
6 Weld/Power Speed
Adjustment Screw
Loosen jam nut and lock nut. Turn
adjustment screw until engine runs
at weld/power speed. Tighten jam
nut, and then tighten lock nut.
Y Stop engine.
Reinstall air cleaner, rear panel,
and top cover.
Tools Needed:
10 mm
8 mm
803 848 / 802 457