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3. Examine that the carburetor is sealed.
a) Connect a pressure tester to the fuel inlet on the
carburetor. Pump up the pressure to 50kPa.
b) Lower the carburetor in a container with gasoline
to find leaks more easily.
c) No leakage is permitted.
4. Connect the fuel hoses (E) and (D) to the carburetor.
B
E
D
C
5. Connect the throttle wire (C).
6. Attach the air filter housing and the gaskets (A) and
(B) to the carburetor with the screws.
30 - Repair instructions
A
7. Attach the air filter.
8. Close the air filter cover with the clips.
7.8.4 To adjust the carburetor
To adjust the carburetor means that you adjust the
engine to the local conditions such as weather, altitude
and fuel.
The carburetor has 3 adjustment controls.
•
L = low speed jet
•
H = high speed jet
•
T = idle speed screw
The low speed jet and the high speed jet adjust the fuel
flow to align with the airflow from the throttle valve
opening. Turn the low speed jet and high speed jet
clockwise to decrease the quantity of fuel. Turn the low
speed jet and high speed jet counterclockwise to
increase the quantity of fuel. Less fuel increases the
engine speed and a more fuel decreases the engine
speed.
The idle speed screw controls the throttle position. Turn
the idle speed screw clockwise gives fast idle speed,
turn it counterclockwise gives lower idle speed.
The high speed jet and the low speed jet in the
carburetor can only be adjusted with the special tool.
Servicing tools on page 11 .
Refer to
H
L
T
911 - 001 - 15.02.2019
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