Rotax 912-UL Repair Manual

11)
Dimension
sheets
Rotax
912
11.1)
Dimension
sheet
1:
Crankshaft
No.:
1)
Con-rod
bearing
2) Press
fit
Nr.
I
crank
pin
lconrod
big
end
34,04
=
1,3/;02
34,05
=
1,3406
34,065
=
1,341
34,090
=
1342
33,91
=
1,3350
33,92
=
1,3354
0,14
=
.6955
0,12
--
.0047
3)
Journal
dia.
of
main-
and
backing
bearings
HIlUZ
H3
1n.'fit,n. 1,fi',n.
4)
Dellection
between
centres
H1IH2
H3
Nom.
max.
mm
5) Deflection
on
V-blocks,
supports
At
Hl
and H3
sllSz
Nom.
ma<.1
remark
mm
in.
FGI
6)
Sundries
44,45
mm
=
1,7500
in.
44,46
mm
=
1,7504
in.

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)