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Engine Maintenance Manual
Jabiru Aircraft
Pty Ltd
JEM0002-5
Jabiru 2200 & 3300 Aircraft Engines
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ISSUE
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5
Dated : 2nd June 2015
Issued By: AS
Page: 8 of 103
L:\files\Manuals_For_Products\Engine_Manuals\Engine Maintenance Manual 22 & 33\JEM0002-5.docx
The crankshaft is designed with a double bearing at the propeller flange end and a main bearing
between each big end; it therefore does not have flying webs. 48mm main bearings are also of the
automotive slipper type. Thrust bearings are located fore and aft of the front double bearing
allowing either tractor or pusher installation.
Pistons are manufactured to Jabiru design by a major manufacturer, they are fitted with 3 rings, the
top rings being cast iron to complement the chrome molybdenum cylinder bores. Valves are 7mm
(stem dia) which are purpose manufactured for the Jabiru engine.
The valve gear includes pushrods from
roller
hydraulic cam followers to forged steel valve rockers
mounted on a shaft through a Teflon coated bronze-steel bush. Valve guides are manufactured
from aluminium/bronze, as is found in larger aero engines and high performance racing engines.
Replaceable valve seats are of nickel steel and are shrunk into the aluminium cylinder heads. The
valve gear is lubricated via the hollow pushrods.
An internal gear pump is driven directly by the camshaft & provides engine lubrication via an oil
circuit which includes an automotive spin-on filter, oil cooler and in-built relief valve.
The standard engines are supplied with two Ram-air cooling ducts, which have been developed by
Jabiru to facilitate the cooling of the engine and direct air from the propeller to the critical areas of
the engine, particularly the cylinder heads and barrels. The fitment of these ducts is a great bonus
for the home builder or engine installer, as they remove the need to design and manufacture
baffles and the establishment of a plenum chamber, which is the traditional method of cooling air-
cooled aircraft engines. The fact that these baffles and plenum chamber are not required also
ensures a "cleaner" engine installation, which in turn facilitates maintenance and inspection of the
engine and engine component. So the hard work of engine installation has largely been done for
you by the Jabiru design team. RAM AIR ducts are available for tractor or pusher configurations.
Special ducts are available for certain installations.
The engine is fitted with a 1.5 kW starter motor, which is also manufactured by Jabiru and provides
very effective starting. The engine has very low vibration levels, however it is also supported by
four large rubber shock mounts attached to the engine mounts at the rear of the engine. An
optional bed mount is available.
The fuel induction system comprises a BING pressure compensating carburettor. Following
carburation, the fuel/air mixture is drawn through a swept plenum chamber bolted to the sump
casting, in which the mixture is warmed prior to entering short stainless steel induction tubes
attached to the cylinder heads.
An effective stainless steel exhaust and muffler system is fitted as standard equipment, ensuring
very quiet operations, which in the Jabiru aircraft have been measured at around 62dB at 1000' full
power flyover.
The Jabiru engine is manufactured within an Australian Civil Aviation Safety Authority (CASA)
approved Quality Assurance System to exacting standards.
Jabiru Aircraft recommend a TBO of 2000 hours, with a top end overhaul done at 1000 hours, or
when engine condition indicates the need to overhaul earlier.