a. Disassembly/reassembly
b. Inspection
– Engine switch (Without oil alert)
Turn the switch, and check the continuity between the wire and the fan cover with an ohmmeter.
Replace the switch if the correct continuity is not obtained.
– Engine switch (With oil alert)
1) Check the continuity between the engine switch black wire and the switch mounting bracket with an ohmmeter.
Replace the switch assembly if the correct continuity is not obtained.
2) Oil alert unit
Connect a battery (1.5 to 6V) to the oil alert unit leads, as shown. The oil alert lamp should light.
Replace the oil alert unit if the lamp does not light.
Black lead to battery (+)
Yellow lead to battery (–)
– Control box (Starter motor equipped type)
1) Combination switch
Check for continuity between the wires shown in the following table. There should be continuity between o-o marks with the switch in the indicated position.
Replace the combination switch if the correct continuity is not obtained.
2) Oil alert unit
Connect a battery (1.5 to 6V) to the oil alert unit leads, as shown. The oil alert lamp should light.
Replace the alert unit if the lamp does not light.
Black/Red lead to battery (+)
Yellow lead to battery (-)
3) Rectifier
Check continuity between the terminals. There should be continuity in one direction only. Replace the rectifier if there is continuity in both directions or in neither direction.
4) Circuit breaker
Check continuity between the two terminals. There should be continuity in the ON position (button in)
and no continuity in the OFF position (button out).
Replace the circuit breaker if the correct continuity is not obtained.
