Engine
T01033GB.fm 40
6. Engine
6.1 Maschineneinsatz in größeren Höhen
6.1.1 Air is rarer at greater altitudes and the main jet of the standard
carburettor supplies the engine with an extremely rich fuel-air mixture.
This, in turn, leads to a loss of engine power and the consequent
increase in fuel consumption.
High altitude engine power can in general be improved when installing
a smaller main jet and through adjustment of the pilot screw. The
engine only looses approximately 10 % of its performance number per
1000 m (3000 feet) height increase if the carburettor jet is correctly set.
The engine looses yet more power if no main height jet is installed.
The following graph shows the relation between height influence and
performance number for a correctly set jet.
Always check out the built-in standard jet before proceeding to order
or calculate additional jets. These can vary in some types of
equipment, models or countries.
Available horse power
(in % of the maximum rated
Principal jet
number for
reduction
Relative air pressure
Height
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