![background image](http://html.mh-extra.com/html/jabiru/3300/3300_installation-manual_626387027.webp)
Jabiru Aircraft
Pty Ltd
Installation Manual
Jabiru 3300 Aircraft Engine
REVISION
0
1
2
3
4
5
6
7
Dated : 1
st
Dec 2016
Page: 27 of 56
5
Fuel Supply System
5.1
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
.
Ensure the fuel tank is properly vented.
5.2
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 disposable paper element automotive filter has been used successfully. Note that this filter, or
any other filter with a plastic body must not be used on the engine side of the firewall
– regulations and
common sense both require that all fittings in the fuel system on the engine side of the firewall must be fire
resistant.
5.3
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.
Many airworthiness categories require that a backup fuel pump be fitted in case the primary pump fails.
Jabiru Aircraft recommend fitting an electrical boost pump. If fitted, this pump must also fulfil the fuel input
criteria for the carburettor, given below.
Some airworthiness categories also require an additional drip tray be fitted to the fuel pump. This optional
tray is shown in Figure 28.
Figure 28. Mechanical Fuel Pump
5.4
Fuel Flow Meters
Where a Fuel Flow Meter is to be installed to the aircraft Jabiru Aircraft recommend that the flow transducer
is not installed on the engine side of the firewall. Most transducers are made of either plastic or light
aluminium and are not fire resistant. Regulations and common sense both require that every part of the fuel
system on the engine side of the firewall must be fire resistant.
5.5
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.
Fuel Pump
Fuel line from firewall
fitting to fuel pump
Fuel line from pump
to carburettor
Fuel pump drip tray
(Optional)