Replacement Part List

39
SERVICING YOUR TILLER
3. Inspect the spark plug. Replace it
if the electrodes are worn or the
insulator is cracked, chipped, or
fouled.
4. Measure the spark plug electrode
gap with a wire-type feeler gauge.
Correct the gap, if necessary, by
carefully bending the side
electrode.
The gap should be:
0.024 – 0.028 in (0.6 – 0.7 mm)
5. Install the spark plug carefully, by
hand, to avoid cross-threading.
6. After the spark plug seats, tighten
with a spark plug wrench to
compress the washer.
If reinstalling a used spark plug,
tighten 1/8 – 1/4 turn after the
spark plug seats.
If installing a new spark plug, tighten 1/2 turn after the spark plug
seats.
TORQUE: 11.8 N∙m (1.2 kgf∙m, 8.7 lbf∙ft)
A loose spark plug can overheat and damage the engine.
Overtightening the spark plug can damage the threads in the cylinder
head.
7. Attach the spark plug cap.
0.024 – 0.028 in
(0.6 – 0.7 mm)
SEALING WASHER
31V146410.book 39 ページ ２０１８年３月７日 水曜日 午前９時８分