10. CHOKE FAST IDLE SPEED

Function

The fast idle speed is critical in keeping the engine running at sufficient speed to overcome the increased resistance of the engine when cold.

Problems

If the choke fast idle speed is not correct, the result will be insufficient chokespeed (stalling) in a cold engine, or excessive speed causing rough engagement of the transmission.

Note: Before proceeding with adjustment, remove and discard fast idle speed adjusting screw and screw tensioning spring in the rear carburetor, if one is installed.

Adjustment

1. If a 100° C. temperature switch is installed in thermostat housing, ground cable end so necessary advanced ignition timing is provided. (See Fig. 1)

2. Crack open throttle.

3. Close choke flap by lifting choke relay lever. Release throttle. (See Fig. 3)

4. Start engine without touching throttle. Observe RPM. (See Fig. 4)

5. Adjust to specified RPM at front carburetor fast idle adjusting screw. See page 34. (See Fig. 5)