Carburetor and Speed Control Adjustment (Fig. 5, 6)

IMPORTANT: Before carburetor and speed control are adjusted, the throttle and choke controls must be adjusted properly.

WARNIN G

Engine must be running during adjustment of carburetor and speed control. To guard against possible personal injury, shift into neutral and engage parking brake. Keep hands, feet, face and other parts of the body away from the cutter blades and any rotating engine parts.

1.Start engine and let it run at half throttle for approxi- mately five (5) minutes to warm up.

2.Move throttle control to SLOW position. Hold gover- nor lever so throttle lever is in the idle position (against

idle stop screw) and turn idle stop screw in or out to get 1400 ± 50 RPM. Check speed with a tachometer.

3.Adjust idle mixture screw:

A.Turn idle mixture screw slowly clockwise (lean mixture) until engine speed just starts to decrease. Note position of screw.

B.Now turn idle mixture screw slowly counterclock- wise (rich mixture) until engine speed just starts to decrease. Note position of screw.

C.Set the idle mixture screw half way between the rich and lean settings.

4.After idle mixture has been adjusted, hold governor lever so throttle lever is in idle position (against idle stop

screw) and adjust idle stop screw to bring engine speed to 1200 ± RPM.

5.With governor control lever in governed idle position (no tension on high speed spring) bend governed idle

spring anchor tang to get a governed idle speed of 1400 ± RPM (Fig. 5).

6.Move throttle control to FAST position. Bend high speed spring anchor tang to bring engine speed to 2800 +50/–100 RPM (Fig. 6).

Figure 5

Figure 6

Adjustments

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Greensmaster® 3100

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Toro 3100 manual Carburetor and Speed Control Adjustment, Warnin G