Spark Plug Inspection - Yamaha YDRA Owner's/Operator's Manual

MAINTENANCE
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Y-516
Y-37

Spark Plug Inspection

You should periodically remove and
inspect the spark plug. Dirty or
worn spark plugs can cause poor
performance.
å Spark plug
∫ Spark plug cap
1. Check for discoloration and
remove carbon deposits with a
spark plug cleaner or wire
brush. The normal electrode
color will be tan.
2. Check the spark plug type, and
check the spark plug gap with a
feeler gauge.
Standard spark plug:
BPR2ES
Spark plug gap:
0.028 ˜ 0.031 in. (0.7 ˜ 0.8 mm)
å Gap
3. Clean the gasket and plug
surfaces and install the spark
plug finger-tight before tightening
to the following torque:
Spark plug torque:
14.5 ft . lb
(20 Nm, 2.0 m . kg)
When removing or installing the
spark plug, be careful not to
damage the insulator. A damaged
insulator could allow external
sparks, which could lead to explo-
sion or fire.
JW1