page 114
May 01/2007
Effectivity: 912 Series
Edition 1 / Rev. 0
d04059
INSTALLATION MANUAL
BRP-Rotax
- Wire of top electronic module (marked "A") for ignition circuit A.
- Wire of bottom electronic module (marked "B") for ignition circuit B.
◆ NOTE: Ignition circuit A controls: top spark plugs of cylinder
1 and 2; lower spark plugs of cylinder 3 and 4.
Ignition circuit B controls: top spark plugs of cylinder
3 and 4; lower spark plugs of cylinder 1 and 2.
■ CAUTION: The electromagnetic compatibility (EMC) and electro-
magnetic interference (EMI) depends essentially on
the wire used. See Fig. 73.
Min. section area: 2x 0,75 mm
2
(18 AMG) (shielded
flexible cable, shielding braid on both ends grounded
to prevent EMI (e.g specification MIL-27500/18).
No or insufficient shielded cables can cause engine
shut-off due to electromagnetic and radio interfer-
ence.
The metal base of each ignition switch must be
grounded to aircraft frame to prevent EMI.
0,75
br
br
B
A
07602
Fig. 73
17.3.5) Electric starter
See Fig. 74.
Wire from starter relay to the electric starter
- cross section of at least 16 mm
2
(6 AWG)
- output: 0,7 kW / 0,9 kW optional
- positive terminal (1): M6 screw (tightening torque 4 Nm (35 in.lb))
suitable for ring terminal to DIN 46225 ((MIL-T-7928) (PIDG) or
equivalent)
- grounding: via engine block
■ CAUTION: Suitable for short starting periods only.
■ CAUTION: Max. 80 °C (176 °F) temperature range by the electric
starter housing. Activate starter for max. 10 sec.
(without interruption), followed by a cooling period of 2
min!
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