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7-6. Adjusting Engine Speed
10
8
9
11
Tools Needed:
1/4, 3/8 in
OM-493 Page 24
6
5
Left Side
4
7
3
2
Top View
±
2200
100 rpm
±
3700
50 rpm
1
2
After tuning engine, check engine
speeds with a tachometer (see
table). If necessary, adjust speeds
as follows:
Start engine and run until warm.
Turn Fine Adjust control to 10.
Remove top cover to access speed
adjustments.
Idle Speed Adjustment
1
Throttle Solenoid
2
Mounting Screw
Loosen two mounting screws.
3
Governor Arm
4
Carburetor
5
Idle Speed Screw
Pull governor arm away from car-
buretor and hold while making the
following adjustment:
Turn idle speed screw until engine
runs at idle speed (see table).
Release governor arm. Place
Engine Control switch in Run/Idle
position.
6
Carburetor Stop
With solenoid energized, slide sole-
noid until idle speed screw just
touches carburetor stop. Tighten
solenoid mounting screws.
7
Governor Arm Extension
Check for smooth operation, and
readjust
solenoid
position
necessary.
Weld/Power Speed Adjustment
Place Engine Control switch in Run
position.
8
Weld/Power Speed Rod
9
Locking Nut
Loosen nut.
10 Adjustment Nut
Turn adjustment nut until engine
runs at weld/power speed. Tighten
locking nut.
Y Stop engine.
11 Sensitivity Spring
See engine manual for governor
sensitivity adjustment.
Reinstall top cover.
ST-800 397 / Ref. ST-802 211
if
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