FUEL SYSTEM 5-11
PILOT SCREW REMOVAL (For E-33)
Because harsh cleaning solvents can damage the O-ring seals
in the pilot system, the pilot system components should be
removed before cleaning.
• Use a 1/8" size drill bit with a drill-stop to remove the pilot
screw plug. Set the drill-stop 4 mm (0.16 in) 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 cleaning.
• Remove the pilot screw along with the spring, washer and O-
ring.
• After cleaning, install 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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