System Description; Description Of Design - Rotax 912 Series Maintenance Manual

2) System description

2.1)

Description of design

All ROTAX engines of the 912/914 Series consist of several main components
and additional aggregates which are described in the following sections.
On the 912 Series: 4-cylinder horizontally opposed 4 stroke engine with a
On the 914 Series: 4-cylinder horizontally opposed 4 stroke engine with turbo-
Liquid cooled cylinder heads
Ram air cooled cylinders
Dry sump forced lubrication
Dual breakerless capacitor discharge ignition
2 constant depression carburetors
On the 912 Series: 1 mechanical fuel pump
On the 914 Series: 2 electric fuel pumps (12V DC)
Propeller drive via reduction gearbox with integrated mechanical shock ab-
sorber and overload clutch
◆ NOTE:
On the 914 Series: Stainless steel exhaust system
On the 912 Series: Individual parts of the exhaust system (optional),
On the 912 Series: engine suspension frame, optional
On the 914 Series: engine suspension frame in serial production
Electric starter (12 V 0,6 kW / optional: 12 V 0.9 kW )
Integrated AC generator with ext. rectifier-regulator (12V 20A DC)
External alternator (12V 40A DC), optional
Vacuum pump: (only possible for Type 2 and Type 4), optional
Hydraulic constant speed propeller governor: (only for Type 3), optional
Effectivity 912/914 Series
Edition 1 / Rev. 0
BRP-Rotax
Maintenance Manual
central camshaft pushrods OHV.
charger and electronic control of boost pressure control
(TCU = turbocharge control unit) and a central camshaft -
push-rods OHV
The overload clutch is fitted in serial production on both
certified aircraft and uncertified aircraft engines of
configuration 3.
usually fitted by aircraft manufacturer
71-00-00
page 3
May 01/2007