19
Maintenance
(continued)
■
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
resistor type spark plug of the correct heat range. Set spark plug electrode gap to 0.6 mm (0.024 in).
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 genuine
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
damaged easily.
135-Hour Maintenance
■
Before reinstalling the new filter
element, 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 deterioration is noted, the unit
should be removed from service
until it can be inspected or repaired
by a Shindaiwa-trained service
technician.
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!
4. Turn adjustment screw:
•clockwise = tighter,
•counterclockwise = 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 return to TDC-compression.
Recheck with proper feeler gauge
to make sure clearance adjustment
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.
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 compression stroke
(TDC), the valves can be adjusted.
2. Loosen adjuster locknut so that the
2.5 mm hex socket head adjustment
screw can turn freely.
3. Insert 0.10 mm (0.004 in.) feeler
gauge between valve stem tip and
rocker arm.
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.
Valve Adjustment
Fuel filter element
Hooked wire
IMPORTANT!
The valve clearance should be adjusted. It is highly recommended that this is
done by a Shindaiwa-trained service technician.
NOTE:
Federal EPA regulations require all model year 2012 and later gasoline powered
engines produced for sale in the United States to be equipped with a special
low permeation fuel supply hose between the carburetor and fuel tank. When
servicing model year 2012 and later equipment, only fuel supply hoses certified
by EPA can be used to replace the original equipment supply hose. Fines up to
$37,500 may be enforced for using an un-certified replacement part.
