Rotax 912 Series Service Manual

BRP-Rotax
Maintenance Manual
Effectivity 912/914 Series
Edition 1 / Rev. 0
72-00-00
page 65
May 01/2007
d02622
Oil carbon residue on up to max 20% of the moving path is permissible.
See Fig. 72-67.
■ CAUTION: If there are heavier deposits, the valve may already
have overheated and must be replaced. There is a
danger of valve fracture at the weld.
Carry out a visual inspection of the 3 retaining grooves (3) on the valve
stem for damage or wear. To check the wear, fit a new valve cotter. It
must fit without perceptible clearance.
Place the valve on roller blocks (4), roll it and measure the max.
permissible out of true value VT02 on the valve disk using a dial gauge.
See Fig. 72-68.
◆ NOTE: The out of true value can also be measured with the
dial gauge adapter assembly part no. 976140 (7). See
Fig. 72-69.
See 72-00-00 sec. 4.
0
10
20
30
40
50
60
70
80
90
0.01mm
1
2
3
4
5
6
7
8
9
0
~45 mm
~25 mm
VT02
5
44
07428
Fig. 72-68
07574
Fig. 72-69
7
(1.77 in.) (0.98 in.)

Rotax 912 Series Specifications

General

Redline	5800 rpm
TBO	2000 hours
Displacement	1211 cc
Bore	79.5 mm
Stroke	61 mm
Power Output	80 hp (59.6 kW)
Compression Ratio	9.0:1
Fuel Type	Avgas 100LL
Ignition System	Dual electronic ignition
Fuel System	Fuel Injected
Oil System	Dry sump
Engine Type	4-cylinder, horizontally opposed, 4-stroke