Service manual

Groundsmaster 3320 Page 3 − 5 Gasoline Engine

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.

Figure 4

1. Speed control lever

2. High speed screw

3. Lock nut

Figure 5

1. Carburetor

2. Throttle lever

3. Idle speed screw

Gasoline

Engine