Spark Plug Inspection - Yamaha U-MAX G23A Owner's/Operator's Manual

Spark plug inspection

Periodically remove and inspect the spark
plug. Dirty or worn spark plugs can cause
poor engine performance.
2
1
1. Spark plug
1. Check for discoloration and heavy car-
bon deposits. The normal electrode color
will be tan. If it is not, replace it.
2. Check the spark plug type, and check the
spark plug gap with a feeler gauge.
2. Spark plug cap
Specified spark plug:
BPR2ES (NGK)
Spark plug gap:
0.7–0.8 mm (0.028–0.031 in)
a. Spark plug gap
8-7
a