Rotax 912-UL Repair Manual

6.18.8)
Ignition
control scheme
Each
ignition
circuit
consists
of 2 ignition-
branches.
Ignition
oc-
curs
on
cylindcr I and
2 simultancouslyevery
360" as
well as on
cyl-
inder3 and
4,
but
l80o
offseL
At the start, the
trailing
edge of
the trigger on
flywheel
gives
theimpulse,
and
whcn running,
theleadingedge
triggcrs.
The
transition
from
start
ignition
timing(6"
BTDC)
to
the
timing
for oper-
ating
(26"
BTDC) takes
place
between
600 to
900
rpm.
The ignition timing
iself is not
adjustable.
6.18.9)
Firing order
Thc firing ordcr
is
t4-2-3
6.18.10)
Data
for
checking the
ignition unit
3\l
ct-
o
E
o
E
E
I
oo
<t
>
F
o
IJ
E
o
.=
E
C'
.JJ
f
O
L
O
lgnition S.G.B.
picl
up
circuit
I
ignition S.G.R.
=
u
L
o
ignition cicuit B
marled red
(on
both ends)
r;@l
lighting coil
(on
sator) ........
.....ycUow
-
yellow
.0,2{,
charging
coil
(on
stator)........
.........red
-
ground
.3,7
{,
trigger
coil ........... ................whitc/red
-
whitc/red
120,00
ignition
coil
(primary
circuit) terminal
-
ground
.0,3
O
ignition coil
(secondary
circuit).........high
voltagc
-
high voltage
...........6,3 kCl
6.19)
Generator
The intergrated
generator
is a
pcrmanent-cxited
l0
polc
single-phasc
generator
with 250
W AC
output.
After rcpair
work secure cable exits by
adhesive
putty
(Sikaflcx
255) agairst
vibrations.
Whcn
installing statorr ensurc
that
routing of the cables
makes uuly contact
with magneto ring
impossible.
Rm::912-UL
I
L
o
g
o
CL
E
u
ffi!_i--.-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)