Engine Overhaul Manual
Jabiru Aircraft
Pty Ltd
Jabiru 2200 & 3300 Aircraft Engines
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Dated : 28/10/2014
Issued By: AS
Page: 19 of 201
L:\files\Manuals_For_Products\Engine_Manuals\Overhaul_Manual\JEM0001-7_Overhaul_Manual_DRAFT_(29_10_14).docx
2.13.20
Ignition system
Dual transistorised ignition is provided by two flywheel mounted rare earth magnets that energise two
fixed coils mounted adjacent to the flywheel. The resulting high-voltage current is distributed to the
spark plugs by two gear driven distributors and associated high tension leads. The ignition system has
fixed timing and is fully redundant, self-generating, and does not depend on battery power for operation.
Spark is not generated below 275rpm crankshaft speed.
2.13.21
Electrical charging system
An integral alternator, using rare earth magnets, provides alternating current for battery charging and
powering electrical accessories. The alternator is attached to the flywheel and is driven directly by the
crankshaft. The alternating current goes to a firewall-mounted regulator and thence to the aircraft
electrical system.
2.13.22
Starter motor
The 1.5kw starter motor is mounted to the engine mounting plate at the left rear of the engine with the
drive gear positioned above and ahead of the flywheel when not engaged.
2.13.23
Sump
The engines are equipped with a wet sump lubrication system. The sump is a cast aluminium item
fitted to the underside of the engine and also provides the mounting points for the induction system and
oil cooler.
2.14 Assessing An Engine
While not intended as a complete guide, the overhauler must be aware that the following factors will
affect the service life of an engine. With familiarity the overhauler will be able to look at an engine on
receipt, assess it and have an excellent idea of what will need to be done and what has caused any
issues. For example:
1. Overheating causes higher than normal oil consumption.
2. Hydraulic engines prior to oil fed rockers (hollow pushrods) have higher wear in rocker bushes.
3. Non adherence to published bulletins will shorten engine life. It is essential that operators keep up-
to-date with all updated Jabiru Service information.
4. Operation with defective valves (partially sealing valves) will end with structural failures and
expensive repairs.
5. Operation with poor quality or incorrect fuel will cause problems.
6. Oil/fuel additives are not to be used; some have proven to have highly detrimental effects on
engines.
7. Incorrect load (propellers) will shorten engine life.
8. The installation and matching of the engine and propeller to the aircraft are absolutely essential for
getting the best out of Jabiru Engines. Guidance material is available in the Jabiru Engine
Installation Manuals and Instruction & Maintenance Manuals.
