Rotax 912-UL Repair Manual

xF
Check eccenter collar
and
plunger
of
fuel
pump
for
wear.
F
Inspect
dog
gear
and dog
hub
for
pittings
on
gear
toothing and sliding ramps,
and
check
extent of wear.
Ensure
that
ramp
tops of
dog
gear
are clearing
valley
of dog
hub
by
I mm
(0,04
in.) nominal.
Slight
fretting
corrosion and
pittings
on dogs are
permissible.
F
Check thickness
of
I mm
bronze thrust
washer
benveen
dog
gear
and retaining
ring.'
@
Propshaft must
not show
fretting
corrosion on bearing
seats. Seat of bearing
6207
E
(35-72-17)
on shaft
must
be a
press
fit.
I
ATTENTION: At
presence
of
fretting
corrosion, inspect
shaft for
cracks
(by
Magnaflux).
xF
Renew
disk
springs at evident wear, but
at
least
after every 1000 hours
of
running time.
uF
Unscrew and clean magnetic
drain
plug
M12
x 1,5
Dimensions
of new
mm
bcaring bush
in
gcar
cover 28,42
+
28,03
radial
clearance
of
prop
shalt,
front
0,01
+
0,03
radial
clcarance of
prop
shaft,
rcar 0,01
+
0,03
axial
clearance of
prop
shaft O,A2
+
0,07
bronzc
thrust
washer
1,00
depth
of wcar on dogs
0,00
t.'
6.15.3)
Dis-assembly
of overload clutch
(inJ
(
I,103)
(
0,m1)
(
O,ml
(0,001+
0,63)
(
0,040)
(
0,000)
(in.)
(0,038
+
0,&ll)
(0O69 +
0,073)
(0,892
+
0,951)
(
0,3%)
wear limit
mm
(in.)
28,10
(1,106)
0,06
(0,m3)
0,06
(0,m3)
0,30
(0,012)
0,80
(0,032)
0,20
(0,m9)
Remove
collar nut
(102x1,5
R.H.
thread), using
pin-face
wrench
877 390. Remove
disk
springs
100x76x2,7,
thrust ring
and
pack
of clutch
disks,
consisting
of 9
plain
steel disks
and 8 sinter
metal coated
disks, and
dog
hub.
Withdraw
beneath
placed
thrust washer 45,2x60x1and
clutch
hub.
Clean all
components
and check for
wear.
Check and
clean
oil-ducts for free
passage
in
€hq1oh-
and
dog
hub
by compressed
air.
Check steel
and sinter disks
for
wear.
Dimension
over
pack
of
9 steel- and
8 sinter
disks
must
not be less
than
21 mm
(0,827).
dimension of
steel disk
sintcr disk
pack
ofdisks
bronzc
thrust
washcr
new mm
0,96
+
1,04
1,75
+
1,85
22,65
+
24,15
1,00
wear limit
mm
(in.)
0,95
(0,039)
1,60
(0,063)
zl,n
(0,827)
0,80
(0,032)

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)