Honda HRX537HYEA Owner's Manual page 14

Air Cleaner Service
A dirty air filter will restrict air flow to the carburetor, reducing engine
performance. If you operate the mower in very dusty areas, clean the
air filter more often than specified in the MAINTENANCE SCHEDULE
(page 13).
NOTICE
Operating the engine without an air filter, or with a damaged filter, will
allow dirt to enter the engine, causing rapid engine wear. This type of
damage is not covered by the warranty.
1. Press down on the
air cleaner cover [1]
tabs, and then
remove the cover.
2. Remove the filter [2]
from the air cleaner
housing [3].
3. Inspect the filter, and
replace it if it is
damaged.
4. Clean the filter by
tapping the filter
several times on a hard surface to remove dirt, or blow
compressed air (not exceeding 207 kPa) through the filter from the
inside. Never try to brush off dirt; brushing will force dirt into the
fibers.
5. Wipe dirt from the inside of the air cleaner housing and cover,
using a moist rag. Be careful to prevent dirt from entering the air
duct that leads to the carburetor.
6. Reinstall the filter and cover.
Spark Plug Service
Recommended spark plugs:
NOTICE
Incorrect spark plugs can cause engine damage.
For good performance, the spark plug [1] must be properly gapped
and free of deposits.
1. Disconnect the spark plug cap [2],
and remove any dirt from around the
spark plug area.
2. Remove the spark plug with a spark
plug wrench [3].
14
[3]
NGK - BPR5ES
[1]
[2]
[3]
3. Inspect the spark plug. Replace it
if the electrodes are worn or if the
insulator is cracked or chipped.
Clean the spark plug with a wire
brush if you are going to reuse it.
4. Measure the spark plug electrode
gap with a suitable gauge. The
gap should be 0.7 ~ 0.8 mm.
Correct the gap, if necessary, by
carefully bending the side
electrode.
5. Install the spark plug carefully, by
[2]
hand, to avoid cross-threading.
6. After the spark plug seats, tighten with a spark plug wrench to
[1]
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 to compress the washer [4].
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 Service
In Europe and other countries where machinery directive 2006/42/EC
is enforced, this cleaning should be done by your servicing dealer.
The spark arrester must be serviced every 100 hours to keep it
functioning as designed.
1. Allow the engine to cool, and then remove the three bolts [1] from
the muffler shield [2] using a 10 mm socket wrench.
2. Remove the muffler shield [2].
3. Remove the screw [4].
4. Remove the spark arrester [3] from the muffler [5].
5. Check for carbon deposits on the spark arrester and the exhaust
port. Brush carbon deposits away. Be careful to avoid damaging
the spark arrester screen.
6. Install the spark arrester in the muffler.
7. Install the muffler components on the engine, and tighten the three
bolts securely.
[2]
[1]
ENGLISH
0.7 ~ 0.8 mm
[4]
[3]
[5]
[4]