Rotax 912 Series Service Manual

BRP-Rotax
Maintenance Manual
72-00-00
page 110
May 01/2007
Effectivity 912/914 Series
Edition 1 / Rev. 0
d02622
Cylinder head
Cyl. 1 Cyl. 2 Cyl. 3 Cyl. 4
Rocker arm
shaft "over-
size"
Int. V. VT05
12,183
0,4796
12,194
0,4801
12,150
0,4783
12,167
0,4790
actual
renewed
Exh. V. VT05
12,183
0,4796
12,194
0,4801
12,150
0,4783
12,167
0,4790
actual
renewed
Rocker arm
shaft radial
clearance
suppurt bore
Int. V.
CH05/
VT05
0,006
0,0002
0,035
0,0014
0,150
0,0059
0,093
0,0036
actual
renewed
Exh. V.
CH05/
VT05
0,006
0,0002
0,035
0,0014
0,150
0,0059
0,093
0,0036
actual
renewed
Rocker arm
bore (for
plastic bush-
ing)
Int. V. VT06
16,000
0,6299
16,018
0,6306
16,038
0,6314
16,028
0,6310
actual
renewed
Exh. V. VT06
16,000
0,6299
16,018
0,6306
16,038
0,6314
16,028
0,6310
actual
renewed
Rocker arm
bore (with
bronze
bushing)
Int. V. VT07
12,000
0,4724
12,027
0,4735
12,150
0,4783
12,089
0,4759
actual
renewed
Exh. V. VT07
12,000
0,4724
12,027
0,4735
12,150
0,4783
12,089
0,4759
actual
renewed
Rocker arm
bore (with
bronze
bushing)
"oversize"
Int. V. VT07
12,200
0,4803
12,227
0,4814
12,350
0,4862
12,289
0,4838
actual
renewed
Exh. V. VT07
12,200
0,4803
12,227
0,4814
12,350
0,4862
12,289
0,4838
actual
renewed
Rocker arm
radial clear-
ance (in the
bronze
bushing)
Int. V.
VT07/
VT05
0,006
0,0002
0,044
0,0017
0,160
0,0063
0,102
0,0040
actual
renewed
Exh. V.
VT07/
VT05
0,006
0,0002
0,044
0,0017
0,160
0,0063
0,102
0,0040
actual
renewed
Wall thick-
ness of
rocker arm
plastic bush-
ing
Int. V. VT08
1,95
0,0768
1,98
0,0780
1,90
0,0748
1,93
0,0758
actual
renewed
Exh. V. VT08
1,95
0,0768
1,98
0,0780
1,90
0,0748
1,93
0,0758
actual
renewed
Description
Code
Reading new
wear
limit
wear
limit
Readings
min max 100% 50%
07223

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