36
SERVICING YOUR TILLER
SPARK PLUG SERVICE
Recommended spark plug:
SPARKPLUG WRENCH
SEALINGWASHER
0.028 0.031in
(0.7 0.8mm)
Disconnect the spark plug cap, and remove any dirt from around the
spark plug area.
Remove the spark plug with a 13/16-inch spark plug wrench.
W20EPR-U (DENSO)BPR6ES (NGK),
Inspect the spark plug. Replace it
if the electrodes are worn, or if the
insulator is cracked or chipped.
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:
Install the spark plug carefully, by
hand, to avoid cross-threading.
After the spark plug seats, tighten
with a 13/16-inch spark plug
wrench to compress the washer.
An incorrect spark plug can cause engine damage.0.028 0.031 in (0.7 0.8 mm)
2.
3.
4.
5.
6.
1.
07/12/21 13:28:08 31V20610_037