Rotax 912-UL Repair Manual

6.18.2)
External
trigger
coils
The
exchange
of the
triggercoils
O
on the
dual ignition
unit
can
be done
in
pairs
only,
because
of
the screening
harness.
Pay
anention
to the
axial
position,
determined
by
distance
sleeves
9.
The
cables
must
be fixed
in
position
without
fail
by clamps.
To
prevenr
breakage
due
to vibrations,
SIKAFLEX
adhesive putty
O must
be used
on
cable
joints
at
trigger
coil.
The trigger
coils
O
(marked
by red
sleeves)
serving
ignition
circuit
rf
B"
are
fined
in
the lowerposition.
A
trigger
gap
of
0,4+ 0,5
mm
(.016+.020
in.)
is
set
after
the
fitting
of ignition
cover
and magneto
housing.
6.18.3)
Interference
suppression
box
Generally,
any repair
work
on
suppression
box ought
to be
carried
out
at
ROTAX.
Dis-assem
bly
of in
terference
su
ppression
box
:
The2
electronic
boxes,
4
double ignition
coils
and 2 feed-through
capacirors
are
placed
in
the
interference
suppression
box.
On
every
suppression
box
you
will
find
a
successive
serial number
on its
cover. Always
state
this number
on inquiries.
To prevent
any mix-up
at
a
later
stage, mark
all 8 H.V.
(high
voltage)
leads
according
to code
on
cover, prior
to withdrawal.
Remove
3
countersunk
screws
M4x8
and
uppei
half
of high
voltage
clip
plate.
Now,
single
H.V.
leads
can
be
exchanged
ar trquirld.
H.V.
leads
are
available
pre-assembled
with
connection
to spark
plug.
Mark
all connections
to
ignition
coils
and
then
detach
wiring.
Remove
4
countersunk
screws
M4xl2
from
underside
of
electronic
box
and
detach
mass
connection.
The
complete
set
of ignition
coils
can
be withdrawn
now.
If
need
be, remove
electronic
boxes
as well,
afterdisconnecting
shorting
lines
from
capacitors.
Check
capacitors,
renew
as
required.
Check
all
other
components.
tTl----ft

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)