KEEWAY F-ACT EVO, Instruction & Maintenance Manual

Page: 116 / 156

- 115 -
11. Carburetor
Preparation data-------------11.1
Fault diagnosis-------------11.2
Removing of the carburetor---------11.3
Installation of the carburetor---------11.4
Adjustment of the carburetor ---------11.5
11.1 Preparation data
Operation precautions
·
Gasoline is very dangerous, smoke and fire is prohibited in the operation site.
·
Take special care to spark.
·
The wire should not be pulled and bended with force, since deformation and damage will affect the its
performance.
·
After carburetor being removed, use rag to block the inlet pipe in order to prevent foreign body in.
·
When having not been used for more than a month, the gas in carburetor buoy should be released, since they
will deteriorate the idle nozzle blockage, making the idling not safe.
The function of the carburetor: the carburetor is a key component of the engine fuel supply
system and its work condition has a direct effect on the stale working, power and economic
indicators. It atomizes a certain amount of gas into tiny oil drops and mixes them with different
amounts of air, forming mist flammable mixed air of different concentration degree according to the
need of different engine working condition, which is provided to the engine in time to ensure its
normal operation.
Preparation standard
unit: mm
Item Standard value
Main nozzle 47.5
Main hole 80#
Idle hole 15#
Oil needle B05-2
11.2 Fault diagnosis
Bad start Hard start, flameout after start, unstable idle