Jabiru Electronic Ignition Upgrade
At high engine RPM, the standard Jabiru ignition system works acceptably. However during starting, the magneto coil require high cranking speeds to generate appropriate spark. This can cause difficulty starting the Jabiru engine. As if the battery has low charge or you find yourself in cold conditions, you may find yourself stranded in a stationary aircraft.
The standard magneto coil offers a reliable spark without battery power, provided engine RPM is high. While the electronic ignition allows the engine to start almost instantaneously, as it does not require a fully charged battery or high cranking speeds to generate sufficient spark. The combination of both types is ideal as it offers both performance and redundancy.
- Starts first blade in any weather condition
- Will start on a poorly charged battery, making battery condition no longer an issue
- Simple ‘bolt on’ upgrade
- Replaced magneto can be retained as a spare
- Enables hand starting
Jabiru Electronic Ignition Upgrade Contents
- 1 x High energy ignition coil
- 1 x Ignition coil lead
- 1 x Hall sensor and mounting plate
- 1 x Ignition module
- 1 x Wiring harness with ignition module plug
- 1 x Heat sink compound
- 1 x Installation and wiring instructions
Jabiru E-Ignition Upgrade FAQs
The additional weight added by the Jabiru Electronic Ignition Upgrade is negligible. The only additional component is the ignition coil, although the redundant magneto coil is removed from the installation.
The Jabiru Electronic Ignition Upgrade installation takes approximately 3 hours to perform. This involves:
- Original magneto removal
- Hall sensor installation
- Mounting the coil and wiring harness to the firewall
- Adding or converting the wiring and power switch to panel
The hall sensor replaces one of the standard magneto systems, where the other is retained as normal. The remainder magneto coil can be kept as a spare. Either magneto can be replaced, although replacing the top magneto is desirable for ease of access.
The system is powered by the main 12 volt bus bar via a typical switch mounted on the panel. A fuse of 15 Amps minimum should be used.
On a typical Jabiru there are two separate ignition switches used to earth the “P” leads of the two magneto coils. In this case, the magnetos are live when the contacts are open, and are off when closed when the “P” leads are earthed. You can use one of these switches to serve as the electronic ignition switch. However, the switch must be 12 volts positive when the contacts are closed. So the switch has to be rotated 180 degrees and the wires changed from switching ground to switching 12 volt positive potential.
You may notice that when the hall sensor is mounted, it is 1 to 4 mm from the magnets, where the magneto is approximately 0.3 mm. This is of no concern as the hall sensor is highly sensitive and works within this range.
For more information, refer to the Jabiru Electronic Ignition Installation Guide.
While the engine is cranking, engage the ignition module.
Note: The engine may have trouble starting if the ignition is engaged before the engine starts cranking. The spark is so hot it tends to kick back the engine.
Tachometer pulse signal provided wire 7 of the ignition module is as follows:
- Jabiru 2200 – 2 pulses per revolution
- Jabiru 3300 – 3 pulses per revolution
- Jabiru 5100 – 4 pulses per revolution
Standard Jabiru spark plugs are used with the Jabiru Electronic Ignition Upgrade. We make no recommendations with regards to spark plug gap modification.
While a greater voltage is required to jump a greater spark plug gap, the advantages in modification are perceived to be negligible.
Wire lengths for the Jabiru Electronic Ignition Upgrade are as follows:
- Wire harness – Ignition Module to Hall Sensor: 74 cm (including length of hall sensor wire)
- Wire harness – Ignition Module Plug to Ignition Coil Plug: 67 cm
- Wire harness – Ignition Coil Plug to Ignition Power Terminal: 67 cm
- Distributor lead – Distributor Cap to Ignition Coil: 40 cm
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