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8.5 SPARK PLUG SERVICE
NOTE
DO NOT rinse spark plug in water. Follow guidelines and be careful not
to overtighten the spark plug.
Recommended spark plug:
HH0403: F6TC
BM1740: F6TC
BLM2050E: F7TC
Check the spark plug gap and clean the carbon deposits at the bottom of the spark
plug.
Tighten 1/2 turn when installing a new spark plug.
Tighten 1/8 TO 1/4 turn when re-installing an old spark plug.
1.
Remove the spark plug cap.
2.
Remove the spark plug with the spark plug wrench.
3.
Visually inspect the spark plug. Replace with a new plug if the insulation is
cracked or chipped. Clean with a wire brush if the spark plug is reused.
4.
Measure the spark plug gap with a feeler gauge. The normal value is:
0.75 mm (0.029 in). Adjust the gap by carefully bending the electrode.
5.
Carefully reinstall the spark plug by hand, to avoid cross-threading. A new
spark plug should be tightened 1/2 turn with a spanner. A used spark plug
should be tightened 1/8 to 1/4 turn with spanner.
6.
Reinstall the spark plug cap.
Oil Dipstick
Spark Plug Cap
BM1740, BLM2050E, HH0403
43
0.75 mm
(0.029 in)
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