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ROCKER ARM CLEARANCE ADJUSTMENT
5..Clean dirt from around the rocker arm cover,.
6. Remove the three screws holding the rocker arm
cover with a phillips head screwdriver,
7. Remove the rocker arm cover and gasket (Fig. 43),
Rocker Arm Cover
Screws FigA3
Rocker Arm
Cover
IF THE CLEARANCE IS NOT WITHIN SPECIFICATION
1,.Loosen the jam nut and turn the adjusting screw
as necessary.To increase the clearance, turn the
adjusting screw CCW,To decrease the clearance,
turn the adjusting screw CW,,
ZTighten the jam nut when the clearance isset,
& Recheck the both clearances, Readjust if necessary,
4, Reinstall the rocker arm cover using a new gasket,,
5,Tighten cover screws evenly until snug,
6. Reinstall the engine cover checking the alignment of
the cover,,Tighten the four engine cover screws until
snug,
8..Pull the starter rope slowly to bring the piston to
the top of its travel, (This position isknown astop
dead center).Check that the piston is at the top of
its travel by looking down into the spark plug hole..
Both valves should be closed and the rocker arms
should move freely. If this statement is not true,
repeat this step°
9, Slide afeeler gage between the rocker arm and the
valve return spring. Measure the distance between
the rocker arm and valve stem (Fig,.44)Take care
to only measure the free play..It is very easy to
insert too thick a feeler gauge and accidentally
depress the valve and spring° Measure both the
intake and exhaust valve distances°
10. Checkthe spark plug and reinstall (See Replacing
the Spark Plug (p.14).,
1I, Reinstall the spark plug wire.
Adjusting Screws Rocker Arm
•The recommended clearance for both intake and
exhaust is0 076-&152mm (0003-0 O06in),
• Useastandard automotive 0127ram (O.O05in)feeler gage_
WARNING:
TO PREVENT SERIOUS INJURY, NEVER PERFORM
MAINrENANOE OR REPAIRS WITH UNIT RUNNING.
ALWAYS SERVICE AND REPAIR ACOOL UNIT. DISCON-
NECT THE SPARK PLUG W_RE TO ENSURE THAT THE
UNIT CANNOT START
Jam Nuts
Feeler Gauge
Exhaust Valve
FigA4
LEHR 1ALL RIGHTS RESERVED 2008-2009
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