ROBEL 62.05L, Operating Manual, Page: 27 / 151

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5. Preparing the machine
5.2 Checking/adjusting the carburetor setting
NOTICE
Risk of engine damage!
The carburetor has been factory-set for an altitude of 400 m
MSL. If the engine is operated at lower altitude without ad-
justing the carburetor setting, it will show low performance,
tend to overheat and finally even suffer severe damage due
to a mixture which is too lean.
► Adjust the carburetor setting according to the altitude.
► Do not change the carburetor setting without reason.
5.2.1 Operation at high altitude (>800 m)
At high altitude above sea level, the mixture of fuel/air be-
comes too rich (due to lower oxygen in the air). This results in
low engine performance and high consumption.
Tools
• Screwdriver
1. Start the engine and allow to warm up.
2. Hold the tamper so that the tamping tool does not touch
the ground.
3. Apply full throttle and evaluate he sound of the engine: If
the engine is not running smoothly, this is an indication
that the mixture is too rich.
4. Turn the screw H (2) clockwise in steps of 1/8 turn each
step, see following figure.
Fig. 17: Screw L (1) und H (2)
5. Evaluate the sound of the engine: If the engine is running
smooth, finish the adjustment. If further adjustment is
needed, continue by turning the screw H (2) clockwise, 1/8
turn each step.
6. Let the engine idle and evaluate the sound of the engine: If
the engine is not running smoothly, this is an indication
that the mixture is too rich.
Setting the carburettor for
high altitude