Checking The Spark Plug - Yamaha XF50W Service Manual

CHECKING THE SPARK PLUG

EAS00060
CHECKING THE SPARK PLUG
1. Remove:
8 panel
2. Disconnect:
8 spark plug cap
w
Remove the spark plug cap, the engine is
extremely hot.
3. Remove:
8 spark plug
cC
Before removing the spark plug, blow away
any dirt accumulated in the spark plug well
with compressed air to prevent it from falling
into the cylinder.
4. Check:
8 spark plug type
5. Check:
8 electrode
8
6. Clean:
8 spark plug
(with a spark plug cleaner or wire brush)
7. Measure:
8 spark plug gap a
3-18
Refer to"FOOTREST BOARD AND IN-
NER FENDER".
Incorrect -* Change.
Spark plug type (manufacturer)
CR7E(NGK)
©
Damage/wear -* Replace the spark plug.
insulator©
Abnormal color -* Replace the spark plug.
Normal color is medium-to-light tan.
(with a wire Thickness gauge)
Out of specification -* Regap.
Spark plug gap
0.7 ~0.8mm(0.028 ~0.031in)