Effectivity: 912 Serie BRP-Powertrain page 7-7
OM Edition 2 / Rev. 0 April 01/2010
d04679.fm
7.4) Electric system
General note See Fig. 4
The ROTAX 912 engine is equipped with a dual ignition unit of a
breakerless, capacitor discharge design, with an integrated gene-
rator.
The ignition unit needs no external power supply.
Charging coils Two independent charging coils (1) located on the generator sta-
tor supply one ignition circuit each. The energy is stored in capa-
citors of the electronic modules (2). At the moment of ignition 2
each of the 4 external trigger coils (3) actuate the discharge of the
capacitors via the primary circuit of the dual ignition coils (4).
NOTE: The trigger coil (5) is provided for rev counter si-
gnal.
Firing order: 1-4-2-3.
Fig. 4
00425
Part Function
1 charging coils
2 electronic modules
3 trigger coils for ignition signal
4 dual ignition coils
5 trigger coils for speed signal
B1/2
B3/4
A1/2
A3/4
4
4
4
4
2
2
3
1
3
5
Ignition circuit A
Ignition circuit B
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