Europa Aircraft Rotax 914, Installation Manual

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2. Engine controls
The Rotax 912 has two independent carburettors, each one providing a fuel/air mixture to one pair of
cylinders.
The only mechanical controls required for the carburettors are throttle and choke. There is a
computer controlled turbocharger wastegate control, which varies the boost pressure in response
primarily to demand from throttle position, but limited also by other functions such as RPM, static
pressure, airbox pressure and temperature, etc.
The throttle lever will be set to give engine output varying from 0% to 115% (full throttle position).
This power is available only for 5 minutes, normal continuous maximum power being 100%. Stops
on the carburettors control the 0% and 115% positions, but a gate will need to be included in the
slotted facia plate, through which the throttle lever runs, to set the 100% position. Special purpose
software is used with which to set the throttle stops, details of which are to be found in the Rotax’s
914 Engine Installation Manual
Although there are two independent throttles and chokes, there is only one throttle and one choke
control in the cockpit.
Throttle Control
A single lever, protruding through a slot in the central spine on top of the central tunnel, provides the
pilot with throttle control. The lever is mounted and pivots in a fibreglass housing fixed to the
underside of the wheel well, and operates two separate cables.
Throttle Lever Housing
Drill the holes in the throttle lever housing, as shown in figure 1.
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Europa XS Rotax 914 Engine Manual Issue 9 April 2006
Fig 1. Throttle lever housing drilling dimensions.