Spark Plug Service - Benchmark BP Series Manual

5.4 SPARK PLUG SERVICE

Note
Do not rinse spark plug in water. Follow guidelines and be careful not to
overtighten the spark plug
Tighten ½ turn when installing a new spark plug.
Tighten ¼ turn when re-installing an old spark plug.
Wing nut
Air Cleaner Cover
Air Filter
Grid
Wing nut
Air Cleaner Cover
1. Disconnect and remove the spark plug using a wrench.
Air Filter
2. Inspect the spark plug and clean any dirt from the electrodes with a wire
Grid
brush. If electrodes are worn or show signs of wear, replace spark plug.
3.
Measure the electrode gap with a spark plug gauge and adjust as
necessary by bending the side electrodes. Ensure that the gap is between
0.7 and 0.8mm.
4. Reinsert the plug carefully. Tighten with a spark plug wrench.
Spark Plug
Spark Plug
31
Electrode Gap
0.028 - 0.031 in
(0.7 - 0.8 mm)
Electrode Gap
0.028 - 0.031 in
(0.7 - 0.8 mm)
BP SERIES