Rotax 912-UL Repair Manual

Piston rings
lst
compression
ring
height
ofgroove
height
of
ring
ring/groove clearance
ring
end
gap
2nd
compression
ring
(bevel
ertgetl)
height
of
groove
height
of
ring
ring/groove clearance
ring
end
gap
3rd
ring
(oil
scraper ring)
height
ofgroove
height of ring
ring/groove clearance
ring end
gap
Cylinder
head
wear on valve seat
valve
guide
bore
valve
stem
stem clearance
rocker
arm
bore
rocker arm shaft
"
raclial clearance
depth of
wear on contact tace
of valve stem
Prop
gear
box
wear depth on dogs
thickness of thrust
washcr
steel disk
sinter disk
set height ofclutch disks
(8
inner and 9 outer disks)
Radial
clearance
of
prop
shaft beside bearings:
liont
rear
axial
clearance ofprop shaft
9.L) Conversion
table:
lmm
I
bar
lkw
I cm3
0,03937 in.
14,5U
p.s.i.
1,34r
hp
0,061 cu.in.
1,52
+
1,54
1,478+
1,49
0,03
+
0,062
0,15
+
0,35
1,27
+
1,29
l,l2
+
1,24
0,03
+
O,Mz
0,03
-p
0,5
3,01
+
3,03
2,84
+
2,99
0,02
+
0,045
0,15
+
0,4
0
7,006+ 7,018
6,965+ 6,980
0,U26+ 0,053
12,06
+
12,08
12,023+ 12,0Y
0,026+
0,057
0
0
1,0
+
l,u
+
1,85
+24,15
0,01
+
0,01
-r
0,02
+
(0,598
'''
(0,054
-r
(0,001+
(0,006
r-
(0,050 +
(0,0t{+
(0,001+
(0,001
r'
(0,118 +
(0,112
.r
(0,001 +
(0,006
+
1,60
(0,063)
1,45
(0,057)
0,10
(0,m4)
1,00
(0,039)
1,35
(0,053)
1,20
(0,M7)
0,10
(0,004)
1,00
(0,039)
3,ro
(0,122)
2,95
(0,116)
0,10
(0,004)
1,00
(0,039)
0,30
(0,118)
7,15
(0,282)
6,94
(0,273)
0,15
(0,006)
t2,2O
(OA8O)
1t,98
(0,472)
0,15
(0,006)
0,25
(0,010)
0,96
1,75
22,65
0,061)
0,059)
0,002)
0,014)
0,051)
0,049)
0,002)
0,020)
0,119)
0,1
l8)
0,0018)
0,0158)
0,000)
0,276)
0,275)
0,002)
o,475)
o,474!.
0,002)
(+
(+
(0,274+
(0,001+
(+
(r-
(0,001+
(+
(-r
(0,038 +
(0,069
*
(0,892
*
0,000)
0,039)
0,041)
0,073)
0,.951)
0,03
0,03
0,07
(+
(-
(0,001+
0,20
(0,m8)
0,80
(0,032)
0,95
(0,037)
1,60
(0,063)
zl,w
(0,927)
0,06
(0,002)
0,06
(0,002)
0,30
(0,012)
0,001)
0,001)
0,003)
lkg
I lsn
lNm
lNm
2,205
0,621
0,737
8,848
lb.
miles
It.tb.
in.lb.
l Liter
=
0,264
gaI.US
1009/kWh
-
9,1644
pvhph
('Cx
1,8) +32
=
degree F

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)