Spark Plug
u
Checking Spark Plug
50
Maintenance
5.
Check the spark plug gap using a wire-
type feeler gauge.
u
If adjustment is necessary, bend the
side electrode carefully.
6.
Make sure the plug washer is in good
condition.
7.
Install the spark plug. With the plug
washer attached, thread the spark plug in
by hand to prevent cross-threading.
8.
Tighten the spark plug:
●
If the old plug is good:
1/8 turn after it seats
●
If installing a new plug, tighten it twice
to prevent loosening:
9.
Reinstall the spark plug cap. Take care to
avoid pinching any cables or wires.
The gap should be:
0.80 to 0.90 mm (0.031 to 0.035 in)
Side electrode
Spark plug gap
Plug washer
a) First, tighten the plug:
NGK:
1/2 turn after it seats.
DENSO: 3/4 turn after it seats.
b) Then loosen the plug.
c) Next, tighten the plug again:
1/8 turn after it seats.
NOTICE
An improperly tightened spark plug can damage the
engine. If a plug is too loose, a piston may be damaged.
If a plug is too tight, the threads may be damaged.
17 MSX125 (LO CA)-32K26D200.book 50 ページ ２０１７年２月１４日 火曜日 午前１０時２２分
