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11.Carburetor
Preparing documents --------------11.1
Failure diagnosis -------------------11.2
Carburetor disassembly -----------11.3
Carburetor installation ------------11.4
Carburetor adjustment ------------11.5
11.1 Preparing documents
Work Instructions
·Gasoline is very dangerous. Fire is strictly forbidden in workplace.
·Pay special attention to spark.
·Forcibly pulling and bending of wires is not allowed. Distortion and damage will affect their function.
·After the carburetor is disassembled, block the intake manifold with cloth in case that any foreign matter enters.
·If not used for more than one month, gasoline in the float chamber of the carburetor shall be drained out since it
may block the idling jet after deterioration, which affects idle speed.
Carburetor functions: Carburetor is a critical component in the fuel supply system of the engine; its work
condition directly affects the stability as well as the dynamic and economic indicators of the engine. It atomizes
certain amount of gasoline into small oil drops, and evenly mixes it with different quantities of air to form
combustible vaporific mixed gas of different concentration upon different working conditions of the engine. The
mixed gas will be supplied to the engine to ensure continuous and normal operation.
Preparing Principles Unit: mm
Item Standard value
Main jet 47.5
Main metering jet 50#
Idle metering jet 22.5#
Oil needle B05-2
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