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CARBURETOR
HANDLING NOTE
At high altitudes, the atmospheric pressure is
lower. This can make the fuel mixture too rich,
leading to such problems as fouled.
Spark plugs and slow response at high engine
speeds. A special part, High Altitude Main Jet
1 #100 (620-14231-20) is available to correct
this.
EC464000
INSPECTION
Carburetor
1. Inspect:
• Carburetor body
Contamination → Clean.
TIP
• Use a petroleum based solvent for cleaning.
Blow out all passages and jets with com-
pressed air.
• Never use a wire.
2. Inspect:
• Main jet 1
• Main jet nozzle 2
• Pilot jet 3
TIP
• Use a petroleum based solvent for cleaning.
Blow out all passages and jets with
compressed air.
• Never use a wire.
Needle valve
1. Inspect:
• Needle valve 1
• Needle valve seat 2
Grooved wear a →Replace.
Dust b → Clean.
TIP
Always replace the needle valve and needle
valve seat as a set
4-5
ENG
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