Johnson SKEE-HORSE 25-201R Service Manual page 27

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SECTION 5
TUNE-UP PROCEDURES
TABLE OF CONTENTS
DESCRIPTION . . . . . • . • . . . . . . . . . . . . . . 5-2
FACTORS AFFECTING PERFORMANCE. . . . . 5-2
FUEL SYSTEM . . . . . . . . . . . . . . . . . . 5-2
IGNITION SYSTEM . . . . . . . . . . . . . . . 5-2
COMPRESSION . . . . . • . . . . . . . . . . . . 5-2
NEW VElllCLE DELIVERY . . . . . . . . . . . • . . 5-3
TUNE- UP PROCEDURES . . . . . . . • . . • . . . . 5-3
IGNITION TIMING ADJUSTMENT. . . . . . . . • . 5-5
COMPRESSION RELEASE VALVE
ADJUSTMENT . . . . . . . . . . . . . . . . . . • . . 5-5
CARBURETOR ADJUSTMENTS .. . . . . . . . . . 5-5
lllGH SPEED NEEDLE VALVE . . . . . . . 5-5
LOW SPEED NEEDLE VALVE. . . . . . . . 5-6
IDLE ADJUSTMENT SCREW . • . . . . . . . 5-6
SPARK PLUGS. . . . . . . . . . . . . . . . . . . . . . 5-6