Rotax 912-UL User Manual

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page 9 - 6
Jan. 01/2007
Effectivity: 912 Serie
OM Edition 1 / Rev. 0
BRP-Rotax
gear ratio
crankshaft : propeller shaft 2,27 : 1 2,43 : 1
propeller shaft : hydraulic governor/vacuum pump 0,758 : 1
crankshaft : hydraulic governor/vacuum pump 1,724 : 1 1,842 : 1
9.5.1) Hydr. governor for const. speed propeller, vacuum pump:
Alternatively either a vacuum pump or a hydraulic governor for
constant speed propeller can be used. The drive is in each case via
the propeller reduction gear.
Gear ratio:
◆ NOTE: Transmission ratio between crankshaft and hy-
draulic governor or vacuum pump is either 1,842 or
1,724 i.e. the speed of the hydraulic governor or
vacuum pump is either 0,54 or 0,58 of engine
speed.
02720

Rotax 912-UL Specifications

General

Displacement	1211 cc
Bore x Stroke	79.5 mm x 61 mm
Compression Ratio	9.0:1
TBO (Time Between Overhaul)	2000 hours
Engine Type	4-cylinder, 4-stroke
Power Output	80 hp
Cooling System	Liquid/air-cooled
Fuel Type	Avgas 100LL or unleaded automotive gasoline
Oil Capacity	3 liters
Fuel System	2 carburetors
Oil System	Dry sump forced lubrication with separate oil tank
Reduction Gear Ratio	2.43:1
Max Continuous Power	75 hp (56 kW)