Measure the spark plug gap and perform
the spark test.
Standard gap: .028-.034 in. (0.7-0.8 mm)
Perform the spark test again using a new
→normal
Replace the spark plug
Perform the spark test again using a new
→normal
Replace Ignitor
Disconnect low oil alarm and perform the
→abnormal
Replace low oil alarm
Check the ignition control module
Replace the ignition module
Check resistance of motor ignition winding
Check trigger air gap and trigger
→abnormal
Adjust the air gap and/or replace the trigger
Check the ignition coil resistance and high
voltage cable and insulation cap
→abnormal
Check the ignition coil
Check or replace wiring harness
d. Engine oil level is low, but engine does not stop.
Drain out all engine oil, disconnect the
low oil alarm wire and check if the outlet
terminal is connected to ground
→not
conductive
Replace the oil level alarm switch
Connect the alarm wire, loosen ignition
module receptacle and check if the
orange wire is connected with the ground
→not
conductive
Repair or replace wiring harness
e. Engine speed does not increase or is unstable
Check air filter element for clog
Check the valve clearance
Adjust the valve clearance
Remove the spark plug and check the
electrodes for carbon and spark plug gap
→abnormal
Clean the spark plug and adjust the spark
plug gap or replace new spark plug