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Maintenance (continued)
50-hour maintenance
Remove and replace the fuel filter
element.
■
Use a hooked wire to extract the fuel
filter from inside the fuel tank. Inspect
the fuel filter element. If it shows signs
of contamination, replace with a genu-
ine Shindaiwa replacement fuel filter
element.
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.
■
Before reinstalling the new filter ele-
ment, inspect the condition of all the
fuel system components (fuel pick-
up line, fuel return line, tank vent
line, tank vent, fuel cap and fuel
tank). If damage, splitting or dete-
rioration is noted, the unit should
be removed from service until it can
be inspected or repaired by a Shin-
daiwa-trained service technician.
135-Hour Maintenance
■
Combustion chamber should be decarbonized, and the valve clearance should be adjusted. It is highly recommended
that this is done by a Shindaiwa-trained service technician.
■
Replace the spark plug annually: Use only the type recommended in the "Specifications" section or an equivalent resis-
tor type spark plug of the correct heat range. Set spark plug electrode gap to 0.6 mm (0.024 in).
The valve clearance should be adjusted. It is highly recommended that this is
done by a Shindaiwa-trained service technician.
Valve Adjustment
1.
Remove cylinder cover, rocker arm
cover, and spark plug. Rotate the
crankshaft while observing the piston
through the spark plug opening. When
the piston is at the top of the compres-
sion stroke (TDC), the valves can be
adjusted.
CAUTION!
■
Performing a valve adjustment
incorrectly may cause hard
starting and/or can damage the
engine.
■
If you are unfamiliar with this
engine or uncomfortable with
this procedure, consult with an
authorized Shindaiwa servicing
dealer.
2.
Loosen adjuster locknut so that the
2.5 mm Allen socket head adjust-
ment screw can turn freely.
3.
Insert 0.10 mm feeler gauge
between valve stem tip and rocker
arm.
18
Hooked wire
IMPORTANT!
4.
Turn adjustment screw (clockwise =
tighter, counter-clockwise = looser)
until feeler gauge is almost snug.
Back off just enough to allow gauge
to slip out with limited resistance.
5.
While holding the adjustment
screw in place with the Allen driver,
tighten the locknut with a wrench.
6.
Turn engine over several times, and
returnthe to TDC-compression.
Recheck with proper feeler gauge
to make sure clearance adjust-
ment did not change as a result of
tightening the locknut. Readjust as
necessary.
7.
Replace rocker arm cover gasket
to assure proper sealing and install
cover.
IMPORTANT!
If a new gasket is not available and/
or the old gasket is not damaged, the
old gasket may be reused. Never use
cracked or damaged gaskets!
Fuel filter element
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