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

B
A
JC2
MAINTENANCE

Spark Plug Inspection

You should periodically remove and
inspect the spark plug. Dirty or
worn spark plugs can cause poor per-
formance.
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. Death or serious per-
sonal injury can result from failing
to comply with the warning labels
in this manual.
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.
Y-516
Standard spark plug:
BPR2ES
Spark plug gap:
0.7 ˜ 0.8 mm (0.028 ˜ 0.031 in.)
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:
20 Nm, 2.0 m . kg
Y-37
(14.5 ft . lb)
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