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Maintenance
Every 10/15 Hours
CAUTION!
Never allow dirt or debris to enter the
cylinder bore! Before removing the
spark plug, thoroughly clean the spark
plug and cylinder head area!
Allow the engine to cool before serv-
icing the spark plug! Cylinder threads
can be damaged by tightening or loos-
ening the spark plug while the engine
is hot!
Every 50 Hours
(more frequently if reduced performance
is noted)
■
INSPECTION Inspect the entire
blower and tubes for damage, includ-
ing loose or missing components, and
repair as necessary.
■
SPARK PLUG Replace the spark plug
with a NGK CMR5H (or equivalent),
gapped to 0.6 mm (0.024").
■
FUEL FILTER Use a hooked wire to
extract the fuel filter from inside the
fuel tank.
139/150-Hour Maintenance
Maintenance after first 139-hours,
then ever y 150-hours thereafter.
■
Combustion chamber should be decar-
bonized, and the valve clearance should
be adjusted. It is highly recommended
that this is done by a Shindaiwa-trained
service technician.
14
1.
Use the spark plug wrench to remove
the spark plug.
2.
Clean and adjust the spark plug gap
to 0.6mm (0.024"). If the plug must be
replaced, use a NGK CMR5H or equiva-
lent type plug of the correct heat range.
3.
Install the spark plug finger-tight
in the cylinder head, then tighten it
firmly with the spark plug wrench. If a
torque wrench is available, torque the
spark plug to 16.7-18.6 Nm (148-165
inch- pounds).
Hooked
Wire
Fuel
Filter
Fuel Tank
Figure 23
CAUTION!
Make sure you do not pierce the fuel
line with the end of the hooked wire.
The line is delicate and can be dam-
aged easily.
■
Replace the spark plug annually: Use
onlyNGK CMR5H or equivalent resis-
tor type spark plug of the correct heat
range. Set spark plug electrode gap to
0.6 mm (0.024 inch).
0,6 - 0,7 mm
(0.024 in.)
Figure 22
■
Inspect the filter element for signs of
contamination from debris. A contami-
nated fuel filter should be replaced with
a new Shindaiwa replacement element.
Before reinstalling the filter, inspect the
condition of the fuel line. If you note
damage or deterioration, the blower
should be removed from service until
it can be inspected by a Shindaiwa-
trained service technician.
■
COOLING SYSTEM Use a wood or
plastic scraper and a soft brush to
remove dirt and debris from the cylin-
der fins and crankcase.
NOTE:
The NGK CMR5H also meets the require-
ments for electro magnetic compliance (EMC).
Counter-clockwise
to remove.
Clean the spark
plug and check
the gap at the
electrode.
NGK CMR5H
spark plug gap--all models
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