Spark Plug Inspection
SPARK PLUG1. Check the following items to see that electrodes are not burnt, and insulators are not broken, and how the porcelain insulator is burnt.
^ Broken insulators
^ Wearing electrodes
^ Deposited carbon
For cleaning, use a plug cleaner or wire brush. Clean porcelain insulator above shell as well.
^ Damaged or broken gasket.
^ Burnt condition of porcelain insulator at spark gap.
Dark deposit of carbon indicates too rich a fuel mixture or extremely low air intake. Also, misfiring due to excessive spark gap is suspected.
White burn indicates too lean a fuel mixture or excessively advanced ignition timing. Also insufficient plug tightening is suspected.
2. Clean with a plug cleaner.
Use an air gun to remove dust deposited on plug threads.
Spark Plug Inspection: Step (3):
3. Check plug gap using a plug gap gauge and adjust if it is not as specified.
Standard value: 1.0-1.1 mm (.039-.043 in.)
Spark Plug Cable Inspection:
SPARK PLUG CABLE
1. Check cap and coating for cracks.
2. Measure resistance.
Limit: Max. 22k(Ohms)