ROBEL 62.05L, Operating Manual

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5. Preparing the machine
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7. Turn the screw L (1) clockwise, 1/8 turn each step.
8. 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 L (1) clockwise, 1/8
turn each step.
The carburetor has been set for operation at high alti-
tude.
Even with suitable carburetor setting, engine horsepower will
decrease approximately 3.5% for each 305 m (1,000 feet)
increase in altitude. The affect of altitude on horsepower will
be greater than this if no carburetor adjustment is made.
Make sure that the setting is adjusted again if
the engine is operated at lower altitude.
5.2.2 Operation at low altitude (<100 m)
In low altitude (MSL) the mixture of fuel/air becomes too poor.
This causes reduced engine performance and overheating
which may result in engine damage.
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 poor.
4. Turn the screw H (2) counter clockwise in steps of 1/8 turn
each step, see following picture.
Fig. 18: 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) counter clock-
wise, 1/8 turn each step.
Adjusting the carburetor for
low altitude