Suzuki UG110 2021, Service Manual

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FUEL AND LUBRICATION SYSTEM 4-15
INSPECTION AND ADJUSTMENT
Check the following items for any damage or clogging. If any dam-
ages are found, replace the damaged parts with new ones.
* Main jet * Throttle valve
* Pilot jet * Float
* Needle jet * Needle valve
* Air screw * Pilot outlet and bypass holes
* Thermoelement (
7
6-22)
NEEDLE VALVE
If foreign matter is caught between the valve seat and the needle
valve, the gasoline will continue flowing and overflow. If the valve
seat and needle valve are worn beyond the permissible limits,
similar trouble will occur. Conversely, if the needle valve sticks,
the gasoline will not flow into the float chamber. Clean the float
chamber and float parts with gasoline. If the needle valve is worn,
as shown in the illustration, replace it with a new valve seat. Clean
the fuel passage of the mixing chamber with compressed air.
FLOAT HEIGHT ADJUSTMENT
To check the float height, turn the carburetor upside down. Mea-
sure the float height
A
while the float arm is just contacting the
needle valve using vernier calipers. Bend the tongue as neces-
sary to bring the float height
A
to the specified value.
NOTE:
When measuring the float height, remove the O-ring.
4
Float height
A
Standard: 9.5 ± 0.5 mm
2
09900-20101: Vernier calipers