Checking The Carburetor - Yamaha FT50C Service Manual

FUEL

Checking the carburetor

1. Check the air and fuel passages and jets,
for dirt and foreign matter. Clean the car-
buretor body with a petroleum based sol-
vent if necessary.
2. Blow compressed air into all passages
and jets.
CAUTION:
• Direct the compressed air downward,
otherwise cleaning solvent may be
blown into your eyes or small parts of
the carburetor may be blown off.
• Do not use steel wire for cleaning the
jets, otherwise the jet diameters may be
enlarged, which may seriously affect
performance.
3. Check the main jet 1, pilot jet 2, and
main nozzle 3 for dirt or residue. Clean if
necessary.
3
4. Check the pilot screw and needle valve
for bends or wear. Replace if necessary.
4-11
Fuel system
2
1
S62Y4230
5. Check the float for deterioration. Replace
it necessary.
6. Measure the float height a. Replace the
float or needle valve, if out of specifica-
tion.
62Y5A11