Rotax 914 series Maintenance Manual

Effectivity 912/914 Series
Edition 1 / Rev. 0
78-00-00
page 13
May 01/2007
d02627
BRP-Rotax
Maintenance Manual
The bearings are tested by means of the pressure drop measuring
method.
■ CAUTION: For this test, compressed air at approx. 2 bar (29 p.s.i)
and a testing device are needed.
Consisting of:
2 pressure gauges
1 orifice jet (inner diameter = 1 mm (.039 in.) / length = 3 mm
(.12 in.)
1 connecting nipple M12x1.5
for the thread in the middle section of the turbocharger
1 cover plate for the oil outlet
n.B. connecting hoses
Procedure:
Screw in the connecting nipple and close the oil outlet with the cover
plate.
Connect the pressure gauges together with the regulating valves.
Apply a constant pressure of 2 bar (29 p.s.i) to the connection
cable. The pressure drop must not exceed 50%.
(From 2 bar (29 p.s.i) to max. 1 bar (14.5 p.s.i))
◆ NOTE: For optimum results, the position of the shaft should
always be changed slightly during the check, i.e. the
shaft should be moved backwards and forwards in axial
and radial directions.

Rotax 914 series Specifications

General

Bore	79.5 mm
Stroke	61 mm
Compression Ratio	9.0:1
Cooling System	Liquid-cooled cylinder heads, air-cooled cylinders
Redline	5800 rpm
Engine Type	4-cylinder, 4-stroke
Fuel Type	Avgas 100LL
Oil System	Dry sump
Fuel System	fuel injection
TBO (Time Between Overhauls)	2000 hours
Displacement	1.211 liters (1211 cc)
Power Output	84.6 kW (115 hp) at 5, 800 rpm