4-18 FUEL SYSTEM
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* Do not remove the main air jet 1.
* It is press fitted at the factory and attempting to re-
move it will cause damage.
• Remove the pilot air jet 2.
• Remove the throttle valve 3.
PILOT SCREW REMOVAL (For with plug type)
Because harsh cleaning solvents can damage the O-ring seals
in the pilot system, the pilot system components should be re-
moved before cleaning.
• Use a 1/8“ size drill bit with a drill-stop to remove the pilot screw
plug. Set the drill-stop 6 mm from the end of the bit to prevent
drilling into the pilot screw. Carefully drill through the plug.
• Thread a self-tapping sheet metal screw into the plug. Pull on
the screw head with pliers to remove the plug. Carefully clean
any metal shavings from the area.
• Slowly turn the pilot screw clockwise and count the number of
turns until the screw is lightly seated. Make a note of how many
turns were made so the screw can be reset correctly after clean-
ing.
• Remove the pilot screw along with the spring, washer, and O-
ring.
• After cleaning, reinstall the pilot screw to the original setting by
turning the screw in until it lightly seats, and then backing it out
the same number of turns counted during disassembly.
• Install a new plug by tapping it into place with a punch.
1 Drill-stop
2 Plug
3 Pilot screw
4 Carburetor body
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