SPARK PLUG REMOVAL AND REPLACEMENT
NOTE
It is advisable to replace the spark plug at least once a year to insure easy
starting and good engine performance.
1. Use a spark plug wrench to remove the spark plug.
2. Inspect the spark plug each time you change the oil. The
electrodes should be kept clean and free of carbon. The
presence of carbon or excess oil will reduce proper engine
performance. If possible, check the spark plug gap (area
between electrodes) using a wire feeler gauge.
3. Before installing spark plug, coat threads lightly with
graphite grease if possible, to ensure easy removal next
time the spark plug needs inspection.
4. Reverse the procedure for spark plug installation. Torque to
specification.
VALVE ADJUSTMENT PROCEDURE
NOTE
In order to properly set the valves, the engine must be at TDC on the
compression stroke. To find TDC on the compression stroke, roll the engine
over until the intake valve closes and stops at TDC.
INTAKE VALVE CLEARANCE ADJUSTMENT
1. Remove the valve cover and secondary air pipe assembly.
2. Verify cam lobes are pointed down.
3. Insert correct thickness feeler gauge between end of intake valve stem and
adjuster screw.
4. When clearance is correct, hold adjuster screw and tighten locknut securely.
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