Honda GXV50 Owner's Manual page 10

SPARK PLUG
Recommended Spark Plugs:
The recommended spark plug has the correct heat range for
normal engine operating temperatures.
An incorrect spark plug can cause engine damage.
For good performance, the spark plug must be properly gapped
and free of deposits.
1. Disconnect the spark plug cap, and remove any dirt from around
the spark plug area.
2. Remove the spark plug with a 5/8-inch spark plug wrench.
SPARK PLUG CAP
SPARK PLUG WRENCH
3. Inspect the spark plug.
Replace it if damaged or
badly fouled, if the sealing
washer is in poor condition,
or if the electrode is worn.
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:
0.6 0.7 mm (0.024 0.028 in) − −
5. Install the spark plug carefully,
by hand, to avoid cross-
threading.
6. After the spark plug is seated, tighten with a 5/8-inch spark plug
wrench to compress the sealing washer.
7. When installing a new spark plug, tighten 1/2 turn after the spark
plug seats to compress the washer.
8. When reinstalling the original spark plug, tighten 1/8 1/4 turn
after the spark plug seats to compress the washer.
A loose spark plug can overheat and damage the engine.
Overtightening the spark plug can damage the threads in the
cylinder head.
9. Attach the spark plug cap to the spark plug.
10
CR5HSB (NGK)
U16FSR-UB (DENSO)
SIDE ELECTRODE
0.6 0.7 mm −
(0.024 0.028 in) −
SEALING
WASHER
−
SPARK ARRESTER (optional equipment)
In Europe and other countries where the machinery directive
2006/42/EC is enforced, this cleaning should be done by your
servicing dealer.
Your engine is not factory-equipped with a spark arrester. In some
areas, it is illegal to operate an engine without a spark arrester.
Check local laws and regulations. A spark arrester is available
from authorized Honda servicing dealers.
The spark arrester must be serviced every 100 hours to keep it
functioning as designed.
If the engine has been running, the muffler will be hot. Allow it to
cool before servicing the spark arrester.
Spark Arrester Removal
1. Remove the three 5 mm bolts from the muffler protector, and
remove the muffler protector.
2. Remove the special screw from the spark arrester, and remove
the spark arrester from the muffler.
SPECIAL SCREW
Spark Arrester Cleaning & Inspection
1. Use a brush to remove carbon deposits from the spark arrester
screen. Be careful to avoid damaging the screen.
The spark arrester must be free of breaks and holes. Replace the
spark arrester if it is damaged.
SPARK ARRESTER SCREEN
2. Install the spark arrester and muffler protector in the reverse
order of disassembly.
ENGLISH
MUFFLER
SPARK ARRESTER
MUFFLER
PROTECTOR
5 mm BOLTS