14
NOTICE
Excess oil will restrict air flow through the foam element and may
transfer to the paper element, soaking and clogging it.
6. Place the foam air filter element over the paper element and
reinstall the assembled air filter.
7. Install the air cleaner cover and tighten the cover wing nuts
securely.
Spark Plug
Replace the spark plug every 200 hours of use.
Required Spark Plug:
NGK - BPR5ES
NOTICE
Using an incorrect spark plug can cause engine damage.
For good performance, the
spark plug must be properly
gapped and free of deposits.
1. Allow the engine to cool,
disconnect the spark plug
cap, and remove any dirt
from around the spark plug
area.
2. Remove the spark plug
with a 13/16 in (21 mm)
spark plug wrench.
3. Inspect the spark plug.
Replace it if the electrodes
are worn, or if the insulator
is cracked or chipped.
4. Measure the spark plug
electrode gap with a suitable
gauge.
Gap:
0.028 ~ 0.031 in
(0.7 ~ 0.8 mm)
Correct the gap, if necessary,
by carefully bending the side
electrode.
5. Install the spark plug
carefully, by hand, to avoid
cross-threading.
6. After the spark plug seats,
tighten with a 13/16 in
(21 mm) spark plug wrench to
compress the washer
If reinstalling the old spark plug, tighten 1/8 to 1/4 turn after the
spark plug seats.
If installing a new spark plug, tighten 1/2 turn after the spark plug
seats.
Spark plug torque:
14 ft-lb (20 N·m)
NOTICE
A loose spark plug can overheat and damage the engine.
Overtightening the spark plug can damage the threads in the
cylinder head.
7. Install the spark plug cap on the spark plug.
Spark Arrester (optional part)
The spark arrester must be serviced every 100 hours to keep it
functioning as designed.
Your lawn mower 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. An optional USDA
approved spark arrester is available from an authorized Honda
servicing dealer.
1. Allow the engine to cool and disconnect the spark plug cap.
2. Remove the two self-lock nuts and the muffler protector. Remove
the muffler and the spark arrester from the muffler.
3. Check for carbon deposits on the spark arrester and the exhaust
port. Use a brush to remove any carbon deposits from the screen.
Replace the screen if it is torn or damaged.
4. Installation is the reverse of removal. Tighten all hardware
securely.
Blade Control Lever Adjustment
Measure the free play at the top of the lever.
Free play:
3/4 ~ 1 in
(20 ~ 25 mm)
If adjustment is necessary:
1. Loosen the lock nuts with a
10 mm wrench, and move
the adjuster up or down as
required.
2. Tighten the lock nuts and
recheck the free play.
3. Start the engine outdoors.
Move the throttle to FAST.
Operate the blade control
lever. The blades should
engage when you push the
lever forward, and the blades
should stop quickly when the
lever is released.
If the blades do not start or
stop as they should with the
correct cable adjustment,
take the mower to an authorized Honda servicing dealer for repair.
SPARK PLUG
CAP
SPARK PLUG
WRENCH
0.028 ~ 0.031 in
(0.7 ~ 0.8 mm)
SEALING
WASHER
SPARK ARRESTER
MUFFLER
SCREEN
IDENTIFICATION
PLATE
MUFFLER
PROTECTOR
GASKET
SELF-LOCK NUT (2)
3/4 ~ 1 in
(20 ~ 25 mm)
BLADE CONTROL
LEVER
LOCK NUTS
ADJUSTER
