Spark Plug Service - Honda FG110 Owner's Manual

Spark Plug Service

Recommended spark plugs:
NGK – CM5H or CMR5H
NOTICE
Incorrect spark plugs can cause engine damage.
1. Loosen the captive 5 mm hex bolt with a 4 mm Allen
wrench, then remove the fan cover.
2. Disconnect the spark plug cap, and remove any dirt
from around the spark plug area.
3. Remove the spark plug with a 5/8-inch spark plug
wrench.
4. Inspect the spark plug. Replace it if the electrodes
are worn, or if the insulator is cracked, chipped, or
fouled.
5. Measure the spark plug electrode gap with a
suitable gauge.
Plug gap: 0.024 ~ 0.028 in (0.60 ~ 0.70 mm)
Correct the gap, if necessary, by carefully bending
the side electrode.
6. Make sure the sealing washer is attached and
install the spark plug carefully, by hand, to avoid
cross-threading.
7. After the spark plug seats, tighten with a 5/8-inch
spark plug wrench to compress the washer.
If reinstalling the 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.
NOTICE
A loose spark plug can overheat and damage the
engine. Overtightening the spark plug can damage
the threads in the cylinder head.
8. Attach the spark plug cap.
9. Install the fan cover, and tighten the 5 mm hex bolt
.
securely
SERVICING YOUR TILLER
FAN COVER
5 mm HEX BOLT
SPARK PLUG CAP
SIDE
ELECTRODE
SPARK PLUG
0.024 ~ 0.028 in
(0.60 ~ 0.70 mm)
SEALING
WASHER
21