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
13/16-inch 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:
0.70–0.80 mm (0.028–0.031 in)
5. Install the spark plug carefully, by
hand, to avoid
cross-threading.
6. After the spark plug is seated, tighten with a 13/16-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 a used spark plug, tighten 1/8–1/4 turn after the
spark plug seats to compress the washer.
TORQUE: 20 N·m (14 lbf·ft, 2.0 kgf·m)
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
BPR5ES (NGK)
W16EPR-U (DENSO)
SPARK PLUG
SPARK PLUG
CAP
WRENCH
SIDE ELECTRODE
0.70–0.80 mm
(0.028–0.031 in)
SEALING
WASHER
SPARK ARRESTER (applicable types)
In Europe and other countries where the machinery directive 2006/42/EC
is enforced, this cleaning should be done by your servicing dealer.
The spark arrester may be standard or an optional part, depending on the
engine type. 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. Loosen the two 6 mm nuts and remove the muffler protector,
identification plate, muffler and gasket.
2. Remove the spark arrester from the muffler (take care not to damage
the wire mesh).
6 mm NUTS
PACKING
MUFFLER
Spark Arrester Cleaning &
Inspection
1. Check for carbon deposits around
the exhaust port and spark arrester,
and clean if necessary.
2. Use a brush to remove carbon
deposits from the spark arrester
screen. Be careful not to damage
the screen. Replace the spark
arrester if it has breaks or holes.
3. Install the gasket, spark arrester, muffler, identification plate,
packings and muffler protector in the reverse order of disassembly.
ENGLISH
MUFFLER PROTECTOR
PACKING
IDENTIFICATION
PLATE
SPARK ARRESTER
SPARK ARRESTER SCREEN
GASKET
GASKET