Toro 41188, Service Manual

Page: 25 / 353

Multi Pro 1750 Page 3 − 7 Kohler Gasoline Engine
Adjustments
Adjust Engine Speed
1. Allow engine to reach operating temperature before
checking or adjusting engine speed. Park machine on
a level surface, place range selector in neutral and en-
gage parking brake.
2. Raise the Operator’s seat and remove the engine
cover to access the engine.
3. With engine running, move accelerator pedal to
FAST position.
4. Using a phototach (non−contact tachometer), check
that engine is operating from 3350 to 3450 RPM.
5. If high idle speed is incorrect, adjust high speed
screw on control bracket (Fig. 2).
A. Loosen jam nut on high speed screw.
B. Adjust high speed screw to obtain 3350 to 3450
RPM.
C. Tighten lock nut. Recheck high speed.
6. Allow accelerator pedal to return to SLOW position.
7. Using a phototach, check that engine is operating at
1350 to 1450 RPM.
8. If low idle speed is incorrect, adjust low speed screw
(Fig. 2).
A. Loosen jam nut on low speed screw.
B. Adjust low speed screw to obtain 1350 to 1450
RPM.
C. Tighten jam nut. Recheck low idle speed.
9. Make sure the accelerator pedal contacts the throttle
home switch and comes to rest against the hard pedal
stop when released.
1. Accelerator cable
2. High speed screw
3. Low speed screw
Figure 2
2
1
3
Kohler
Gasoline Engine