Shindaiwa 89300 139/150-Hour Maintenance, Valve Adjustment, Maintenance after first 139-hours

Maintenance (continued)
50-hour maintenance
Remove and replace the fuel filter
element.
Ŷ Use a hooked wire to extract the fuel filter
from inside the fuel tank. Inspect the fuel
filter element. If it shows signs of contam-
ination, 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	Hooked wire
is delicate and can be damaged easily.
Before reinstalling the new filter element,
inspect the condition of all the fuel system
components (fuel pick-up line, fuel return		)XHO¿OWHUHOHPHQW
line, tank vent line, tank vent, fuel cap
	)XHO¿OWHUPDLQWHQDQFH
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.

139/150-Hour Maintenance

Maintenance after first 139-hours,	Ŷ Replace the spark plug annually: Use	Ŷ The valve clearance should be adjusted
then every 150-hours thereafter.	only the type recommended in the	annually or every 135 hours. It is
Ŷ Combustion chamber should be decar-	”Specifications” section or an equivalent	highly recommended that this is
bonized, and the valve clearance should	resistor type spark plug of the correct	done by a Shindaiwa-trained service
be adjusted. It is highly recommended	heat range. Set spark plug electrode	technician.
that this is done by a Shindaiwa-trained	gap to 0.6 -0.7 mm.
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 compression stroke (TDC), the valves can be adjusted.

CAUTION!

ŶPerforming a valve adjustment incorrectly may cause hard starting and/or can damage the engine.

ŶIf you are unfamiliar with this engine or uncomfortable with this procedure, consult with an autho- rized Shindaiwa servicing dealer.

2.Loosen adjuster locknut so that the

2.5 mm Allen socket head adjustment screw can turn freely.

3.Insert 0.10 mm feeler gauge between valve stem tip and rocker arm.

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 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.

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 dam- aged gaskets!

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