Honda HRD536C Owner's Manual page 9

2. Carefully inspect the spark plug. Replace the plug if there are a
lot of deposits or if the insulator is cracked or broken.
3. Measure the plug gap using a set of feeler gauges; the gap must
be between 0.7 and 0.8 mm. If adjustment is necessary,
carefully bend the side electrode.
4. Check that the sealing washer is in good condition; then screw
the plug down by hand until finger tight and correctly seated.
5. Using a plug spanner, give an additional 1/2 turn for a new spark
plug, to compress the washer. If you refit the same plug, just
1/8 to 1/4 turn will do from the finger tight position.
6. Refit the spark plug cap.
CAUTION:
• The spark plug must be correctly tightened. A plug incorrectly
screwed down can become very hot and damage the engine.
MAINTENANCE OF SPARK
ARRESTER
(In Europe and other countries where the machinery directive
2006/42/EC is enforced, this cleaning should be done by your
servicing dealer).
If the lawnmower has just been run, the muffler will still be very
hot. Allow it to cool down before carrying out this operation.
In some regions, it is prohibited to operate an engine without a
spark arrester. Check local regulations before using your
lawnmower. A spark arrester is available on option from Honda
dealers.
1. Remove the three flange bolts [1]
from the muffler protector [2] and
remove the muffler protector.
2. Remove the two tapping screws [3]
from the spark arrester [4] and
remove the spark arrester from the
muffler.
3. Check the carbon deposits around
the exhaust port and spark
arrester. Clean if necessary.
4. Replace the spark arrester if there
are any breaks or tears.
5. Install the spark arrester [4] and
muffler protector [2] in the reverse
order of removal.
C19
SAFETY
[1]
[2]
[4] [3]
[4]
CARBURETOR ADJUSTMENT
CAUTION:
• It is recommended to ask your Honda dealer
for adjustment.
Specified idle speed: 1 700 ± 150 min
+
- 100
Operating speed: 2 800
ROTOSTOP SAFETY LEVER
CLEARANCE
Measure the clearance [5] at the top
of the lever [6] by holding the yellow
button [7] pressed in.
It must be between 5 and 10 mm.
If necessary:
1. Undo the lock nuts [8] with a
10 mm spanner.
2. Move the nuts [8] up or down as
necessary.
3. Retighten the lock nuts [8] and
recheck the clearance.
4. Start the engine outdoors and
engage the cutting-means
control lever. Check that the
cutting-means starts to rotate
when you pull the lever to the
rear, and that it stops rapidly
when the lever is released. If the
cutting means does not start to
rotate or stop as it should, even
when the cable is correctly
adjusted, the system may need
to be repaired. Take the
lawnmower to an approved
Honda dealer.
SAFETY
-1
0
-1
min
SAFETY
[5]
[7]
[6]
2
3
1
[8]
[8]
2
3
1
[8]
[8]
C1 C13
C17
9 EN