PERIODIC MAINTENANCE 2-7
• Remove all the inspection caps.
• Remove all the spark plugs.
• Remove the generator cover plug 3 and the timing inspection
plug 4.
• Rotate the generator rotor to set the No.1 engine’s piston at
TDC of the compression stroke. (Rotate the rotor until the “R I
T” line on the rotor is aligned with the center of hole on the
generator cover.
• To inspect the No.1 engine’s valve clearance, insert the thick-
ness gauge to the clearance between the valve stem end and
the adjusting screw on the rocker arms.
# 09900-20806: Thickness gauge
• If the clearance is out of the specification, bring it into the speci-
fied range by using the special tool.
# 09917-10410: Valve adjust driver
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Both right and left valve clearances should be as closely
set as possible.
• Rotate the generator rotor 450 degrees (1-¼ turns) and align
the “F I T” line on the rotor with the center of hole on the gen-
erator cover.