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Electric Choke

NOTE: This test should be performed when air temperature is 60-80°F (15-27°C).
  1. Allow choke to cool to permit full closing of choke valve when throttle is opened slightly. Start engine and time the interval required for choke valve to reach a fully open position. If choke valve does not fully open within 3 1/2 minutes, proceed with test.
  2. With engine running, check voltage at choke heater connection. If voltage is about 12-15 volts, replace electric choke unit. If voltage is low or zero, check all wires and connections and repair as required. Power for choke unit is through the oil pressure switch. Ensure switch circuitry is good.
  3. If procedure in step 2) does not correct the problem, replace oil pressure switch.
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