3-20
E
INSP
ADJ
GENERAL
Check:
• Electrolyte level
Below the minimum level mark
→
Add distilled water to the proper level.
• Electrolyte specific gravity
Less than specification
→
Recharge
the battery.
Electrolyte specific gravity
1.280 at 20˚C (68˚F)
CHECKING THE SPARK PLUGS
3
1. Check:
• Electrodes
1
Cracks/excessive wear
→
Replace.
• Insulator color
2
Distinctly different color
→
Check the
engine condition.
2. Clean:
• Spark plugs
(with a spark plug cleaner or wire
brush.)
Color guide
Medium to light tan color
Normal
Whitish color
• Lean fuel mixture
• Plugged jet(-s)
• Air leak
• Wrong setting
Blackish color
• Rich mixture
• Excessive oil usage
• Defective ignition system
• Defective spark plug
3260