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Incorrect spark plugs can cause engine damage.
For good performance, the spark plug must be properly gapped and free of deposits.
1.Disconnect the cap from the spark plug, and remove any dirt from the spark plug area.
2.Use the proper size spark plug wrench to remove the spark plug.
3.Inspect the spark plug. Replace it if damaged, badly fouled, if the sealing washer is in
poor condition, or if the electrode is worn.
4.Measure the electrode gap with a suitable gauge. The correct gap is(0.60 0.70 mm). If adjustment is
needed, correct the gap by carefully bending the side electrode.
5.Install the spark plug carefully, by hand, to avoid cross-threading.
6.After the spark plug is seated, tighten with the proper size spark plug wrench to compress the washer.
7.When installing a new spark plug, tighten 1/2 turn after the spark plug seats to compress the washer.
8.When reinstalling the original spark plug, tighten 1/8 1/4 turn after the spark plug seats to compress the
washer.
A loose spark plug can become very hot and can damage
the engine. Over tightening the spark plug can damage the threads in the cylinder head.
9.Attach the spark plug cap to the spark plug.
FLYWHEEL BRAKE INSPECTION
1.Check to see if the inspection screw is contacting the brake bracket.
2.If the inspection screw is contacting the brake bracket, take the engine to an authorized engine servicing
dealer for flywheel brake pad inspection.
3.Release the starter control handle (located on equipment) and verify that there is a strong resistance
when pulling on the recoil starter. Also verify that the governor arm is moved to the idle (slow), position
and there is free play in the cable. The cable should 10 -15 mm from the centerline as shown when the
cable is new.
4.Move the starter control handle(located on equipment) to release the flywheel brake, and verify that
there is clearance between the governor arm and the throttle return rod when the throttle return rod when