Clean/ Replace Spark Plug
Replace the spark plug yearly or every 100 hours of operation,whichever comes first.
CAUTION: Disconnectspark plug wire from
,_ spark plug and keep wire away from spark plug.
Clean area aroundspark plug.
•Remove spark plug form the cylinderhead.
•Replace spark plug if the electrodesare pitted, burnedor porcelain is cracked. For replacement use Champion RC12YC or equivalent.
•Check electrode gap with wire feeler gauge and set gap to 0.76ram (.030 inches), if necessary.
•install a correctlygapped spark plug intothe cylinderhead, tighten securey.
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Valve Cover | Breather Tube |
Make sure the piston is at Top Dead Cer_ter('rDC)
of its compressionstroke (both valves closed). To get the piston at top dead center, pull on the recoil handle slowly watching the pistontrough the spark plug hole. As you pull on the recoil handle the , piston should move up and down. The piston is put Top Dead Center when it is up as high as it can go.
Carburetor
If you thinkyour carburetor needs adjusting,see your nearest Sears Service Center. Engine performance may be affected at altitudesabove 5000 feet. For operationat higher elevations,contactyour nearest Sears Service Center.
Adjusting Valve Clearance
After the firstfilly (50) hours of operation,you should adjust the valve clearance in the engine.
Important: If you feel uncomfortableaboutdoing this procedure or you don'thave the propertools, please take yourcleaning system in to the nearest service center to have the valve clearance adjusted. This is a very importantstep to insure the longest life for your engine.
To adjustvalve clearance:
•Make sure the engine is at roomtemperature.
•Make sure that the spark plug wire is removed from the spark plug and out of the way.
•Remove the breather tube from the valve cover.
Remove the four s_rews attaching the valve cover with a #2 or 3 phillipsscrewdriver.
Allen Wmnol
LooNn Jam Nut
*Using a 10mm wrench, loosen the rockerarm jam nut. Use an 8ram allen wrench to tum the pivotball stud while checking clearance between the rocker arm and the valve stern with a feeler gauge.
Correct clearance is
,When valve clearance is correct, hold the pivotball stud in place with the allen wrench and tighten the rocker arm jam nut. Tighten the jam nut to
change.
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