Valve Adjustment

■■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.

IMPORTANT!

The valve clearance should be adjusted. It is highly recommended that this is done by a Shindaiwa-trained service technician.

1.Remove cylinder cover, rocker arm cover, and set piston at TDC-com- pression.

CAUTION!

•Performing a valve adjustment incorrectly may cause hard start- ing and/or can damage the unit.

•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 (0.004 in.) 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 adjustment screw in place with Allen driver, tighten lock- nut with wrench.

6.Turn engine over several times, and return to TDC-compression. Re- check with proper feeler gauge to make sure clearance adjustment did not change as a result of tightening locknut. Readjust as necessary.

7.Replace rocker arm cover gasket to assure proper sealing and install cover.

IMPORTANT!

If new gasket is not available and/or old gasket is not damaged, old gasket may be reused. Never use cracked or damaged gaskets!

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