Adjust Engine Speed - Toro Groundsmaster 3280-D Service Manual

Adjust Engine Speed

1. Allow engine to reach operating temperature before
checking or adjusting engine speed. Make sure that
throttle control is adjusted properly before adjusting en-
gine speed (see Adjust Throttle Control in this section).
2. Park machine on a level surface, lower cutting deck
(or implement) and engage parking brake. Make sure
that P.T.O. switch is OFF. Raise hood to gain access to
engine controls.
3. With engine running, move remote throttle control le-
ver to FAST position.
4. Using a tachometer, check that engine is operating
at 3100 to 3250 RPM.
5. If high idle speed is incorrect, adjust high speed
screw on governor bracket (Fig. 4).
A. Loosen lock nut on high speed screw.
B. Adjust high speed screw to obtain 3100 to 3250
RPM.
C. Tighten lock nut. Recheck high speed.
6. Move remote throttle control lever to SLOW position.
7. Rotate and hold carburetor throttle lever against the
idle speed screw (Fig. 5). Using a tachometer, check
that engine idle speed is 1400 to 1550 RPM. If idle
speed is incorrect, adjust carburetor idle speed screw to
obtain 1400 to 1550 RPM.
Groundsmaster 3320
1. Speed control lever
2. High speed screw
2
3
1. Carburetor
2. Throttle lever
Page 3 − 5
2
1
Figure 4
3. Lock nut
1
Figure 5
3. Idle speed screw
Gasoline Engine
3