Rotax 912 i Series Maintenance Manual page 120

TYPE DESCRIPTION
e.g. ROTAX 912 i Sc 3
The type description is composed as
NOTE:
follows.
Description
Type 912
Certification iSc
iS
Version 2
3
The exact type descriptions can be
NOTE:
found in the current Operators Manual
for your engine.
TECHNICAL DATA
NOTICE
WARNUNG
Detailed technical data relevant for operation is
listed in the Operators Manual and must be ob-
served.
OPERATING LIMITS
See the current 912 i Series Operators Manual,
"Operating instructions".
Effectivity: 912 i Series
Edition 1/Rev. 0
BRP-Powertrain
MAINTENANCE MANUAL
Description
4-cyl. horizontally op-
posed, normal as-
pirated engine.
Certified according to
EASA CS-E (TC No.
EASA.E121).
Non-certified aircraft
engines.
Propeller shaft with
flange for fix pitch
propeller.
Propeller shaft with
flange for variable pit-
ch propeller and drive
for constant speed
propeller governor
system.
OPERATING FLUIDS/CAPACITIES
See the current 912 i Series Operators Manual,
"Operating fluids".
WEIGHTS
See the current 912 i Series Operators Manual,
"Technical data".
ENGINE/COMPONENTS, GENERAL
Design 4-cylinder normal aspirated
engine
Bore 84 mm
Stroke 61.0 mm
Displacement 1352 cm
Cylinders Light alloy cylinder with Nikasil
plating
Pistons Light alloy piston with 3 piston
rings
Cylinder head 4 single cylinder heads
Compression 10.8:1
Intake valve 38 mm, valve seat plated
Exhaust valve 32 mm NIMONIC, valve seat
stellite-plated
Valve clearance Automatic valve clearance
compensation by means of hy-
draulic valve tappet
Valve drive OHV, hydraulic valve tappet,
push-rods and rocker arms
Camshaft Steel, heat- and surface-
treated
Crankshaft Mounted in 5 places on plain
bearings, carburised
Cooling system Liquid-cooled cylinder heads,
ram air cooled cylinders
Lubrication Oil pump:
Dry sump forced lubrication
with trochoid pump, drive from
the camshaft, blow-by oil re-
turn
Oil pressure Min.: 0.8 bar (under 3500
rpm)
Normal: 3 to 5 bar (over 3500
rpm)
Max.: 7 bar
3
71-00-00
Page 10
July 01/2012