Rotax 912-UL Repair Manual

6.12) Water
pump
tousing
Check
fitted
coolant bends for
leakage,
cracks
and tight
fit.
Visual
check
for
contact of
impeller
0
in housing. Contact
would be evident
at
signs of
wear on impeller and
housing. If
necessary, rectify with a thinner washer €) under
impeller to
obtain
an optimum
gap
of 0,5 mm
(0,02
in.).
6.13)
Rev-counter drive
Mechanical
rev-counter is
driven
from
camshaft.
Remove Allen screw M5x16
O
and
lockwasher
and
withdraw
rev-counter housing
@
along
with O-ring @ and
rev-counter
shaft @
from ignition
cover.
Inspect
toothing O and square end
of
shaft. At oil
leakage
renew
oil
seal
6xl
lx3 @ and O-ring 6.
Press in new
oil-seal
right
down
to stop
in
cover, using
punch
877
400.
ru
@
6.14)
Magneto
housing
assfy
Normally
there is no need to
dis-assemble
magneto
housing,
just
check tightening tonque
(25
Nn/
220
in.lb.)
of the
Allen
sqews
M8x30. If further tightening
is
possibly
at
25
Nin
(220
in.lb.),
then
the screws
have to be
secured
again with
LOCTITE22l.Inspect
taper
and magneto ring.
6.15)
Gearbox
Two versions of the reduction
gearboxes
are
in
production:
a)
with
overload
clutch
b)
without
overload clutch
If
furnished with
overload clutch, check
slipping torque
prior
to dis-assembly.
The nominal
value is
450
+30
Nm
(4000
260 in.lb.), with
reduction ratio2,2'7
:
l.
If the slipping
torque is
not
within this
value
or
if
the wear on
the
sliding tracks O of the dog
hub @ is
beyond
the
limit, dis-
assemble the
overload clutch.
Rm:,,912-UL

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)