Jabiru Aircraft
Pty Ltd
Instruction & Maintenance Manual
Jabiru 2200 Aircraft Engine
Hydraulic Valve Lifter Models
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Dated : June 2010
Issued By: DPS
Page: 9 of 116
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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 the 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. RAMAIR 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 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 62dB
at 1000' full power flyover.
For those owners wanting to fit vacuum instruments to their aircraft the Jabiru engine
design includes an optional vacuum pump drive, direct mounted through a coupling on the
rear of the crankshaft.
The Jabiru engine is manufactured within an Australian Civil Aviation Safety Authority
(CASA) approved Quality Assurance System to exacting standards.
Jabiru 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.
