.
MAINTENANCE & ADJUSTMENTS
SPARK PLUG
Recommended Types
NGKBPRSES
NDWlGEPR-U
(1
Spark plugs of the wrong size or incorrect heat range can cause engine damage.
Checking the Spark Plug
For good performance, the spark plug should have the correct gap and be free of
deposits.
1.
2.
3.
4.
5.
6.
Disconnect the spark plug cap and
remove any dirt from around the spark
plug area.
Remove the spark plug with a
13/,s -inch spark plug wrench.
Inspect the spark plug for excessively
worn electrodes, chips or cracks in the
insulator, or excessive deposits.
Replace the spark plug if you have any
doubts about its condition.
Measure the electrode gap with a wire gap gauge.
Adjust the gap to 0.7 - 0.6 mm (0.026 - 0.031 in) by
bending the side electrode.
Install the plug carefully, by hand, to avoid cross
threading.
Use a spark plug wrench to tighten the plug enough
to compress the washer. For a used plug, tighten ‘/a
to 1/4 of a turn after the spark plug seats. For a new
plug, tighten I/* turn after the spark plug seats.
A loose spark plug can become hot enough to damage
n
0.7
- 0.8
mm
in)
the engine. Over tightening a spark plug can damage the threads in the engine.
7. Install the spark plug cap on the plug.
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