Carburetor Inspection - Yamaha F20A Service Manual

FUEL
CARBURETOR
SERVICE POINTS
CAUTION:
Do not use a steel wire to clean the jets.
This may enlarge the jet diameters and
seriously affect performance.

Carburetor inspection

1. Inspect:
Carburetor body
Cracks/damage → Replace.
Contamination → Clean.
2. Inspect:
Main jet
Pilot jet
Main nozzle
Contamination → Clean.
3. Inspect:
Needle valve
Grooved wear → Replace.
4. Inspect:
Float
Cracks/damage → Replace.
Carburetor
1. Install:
Needle valve
Float 1
Float pin 2
Screw 3
NOTE:
When installing the float into the carbure-
tor, place the needle valve into the needle
valve seat.
The float pin should fit into the slit in the
carburetor and be retained with the screw.
After installation, make sure the float
operates smoothly.
4-8
E