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

Hooked wire

Fuel filter element

■■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).

IMPORTANT!

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.

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!

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Shindaiwa X7502825900 Hour maintenance Remove and replace the fuel filter element, Hour Maintenance, Valve Adjustment
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X7502825900 specifications

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