Jabiru Aircraft
Pty Ptd
Installation Manual
Jabiru 2200 Aircraft Engine
REVISION
0 1 2
Dated : March 2006
Page:
21
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Print Date: 3/8/2006 1:56:00 PM
11
Fuel Supply System
11.1 Fuel
Tank
The fuel tank must be fitted with an outlet strainer of between 8 and 16 mesh per inch, with a
minimum total mesh area of 5 cm
2
.
11.2 Fuel
Filtration
A Fuel filter capable of preventing the passage of particles larger than 0.1mm (100um) must
be installed between the fuel tank outlet and the fuel pump.
The filter must be present in the system for the fuel flow test. The size of the filter should
give consideration to allow adequate flow with a used filter.
A Ryco Z15 or similar filter has been used successfully.
11.3 Mechanical Fuel Pump
The mechanical fuel pump is mounted on the engine crankcase and is camshaft driven. It is
designed to supply fuel at the pressure described in the following paragraph. If fitted, the
electrical boost pump must also fulfill the fuel input criteria for the carburettor, given below.
11.4 Carburettor
A Bing constant depression type 94/40 is used. This carburettor has a minimum delivery
pressure of 5 kPa (0.75 Psi) and a maximum pressure of 20 kPa (3 psi). To confirm that the
fuel system is capable of delivering this pressure a fuel flow test must be performed.
To check pressure, insert a ‘T’ piece between the mechanical pump and the carby.
Test boost pump with engine off, then mechanical fuel pump with engine on, then
combine with electrical boost pump as well, before first flight.
A method for performing a fuel flow test is available from Jabiru if required. A drip deflector
to deflect overflowing fuel from the exhaust system is supplied as standard equipment on the
engine.
Because idle adjustments cannot accurately be made on the dynamometer (where every
engine is run before delivery), some adjustment of the 7mm idle set screw may be required.
A hot idle of around 900RPM is desirable. Fitting an earth strap from carby to crankcase is
recommended to eliminate possible radio interference.
11.4.1 Carburettor
Tuning
Late in 2004 Jabiru Aircraft introduced a new system of needles and jets to the 2200 engine.
The new configuration lowers fuel consumption and is now standard. Details of the
configuration are given below: