Dashpot System Check
- Connect tachometer to engine. Warm engine to normal operating temperature (cooling fan on). Disconnect vacuum hose from throttle control valve.
- Disconnect vacuum hose No. 6 from throttle controller with engine idling. Engine speed should increase to 1400-2000 RPM.
- If speed was too low, widen adjusting slot in throttle control valve lever with a screwdriver. See Fig 2 . If speed was too high, narrow slot with pliers. Loosen lock nut and turn adjusting nut. See Fig 2 .
- If speed cannot be adjusted, or diaphragm will not hold vacuum, replace throttle controller and retest.