Shindaiwa X7501920500 - Manual (Page 16)

16
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.
Valve Adjustment
1. Remove cylinder cover, rocker arm cover, and set piston at TDC-com-
pression.
IMPORTANT!
If new gasket is not available and/or old gasket is not damaged, old gas-
ket may be reused. Never use cracked or damaged gaskets!
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!
The valve clearance should be adjusted. It is highly recommended that
this is done by a Shindaiwa-trained service technician.
Combustion chamber should be
■
decarbonized, and the valve clear-
ance 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.