Jabiru Aircraft
Pty Ltd
Installation Manual
Jabiru 3300 Aircraft Engine
REVISION
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Dated : 1
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Dec 2016
Page: 37 of 56
9
Engine Installation Procedure
Attach male engine mount rubbers to all engine mount pins on the engine mount. Place an AN4-31A bolt
through each mount. Note that an engine mount spacer washer is fitted between the male rubber & the
lower engine mount pins (Refer to Figure 42 below).
With the Back of the Aircraft Supported & the wheels chocked, lift the engine onto the engine mount.
Insert the upper engine mount rubbers into the engine backing plate first by tilting the front of the engine up.
Once both upper rubbers are through the engine backing plate, fit the female rubber, engine mount spacer
washer, engine mount
washer, ¼” washer & Heat Proof nut.
To place the nuts on the mount bolts the rubbers must be compressed. Do this by using a deep reach
socket inside the engine mount pins & clamping the rubber mount assembly using a G-clamp with the swivel
taken off the ball. See Figure 41. Start nuts on both upper mount bolts.
Once bolts of the upper rubbers are started, continue lowering the front of the engine & align the lower
engine mount pins with the engine backing plate.
Use the weight of the engine to compress the lower rubbers & fit the nuts to the bolts.
The lower engine mount rubbers are assembled in the same way, except the male engine mount rubber is
fitted to the engine mount pins first. Refer to Figure 42 below.
Tighten nuts until firm. (Engine mount washer will touch the engine mount pin as the rubbers compress)
Connect the fuel line to fuel pump (Refer to Figure 41). Ensure the fireproof sleeve is in place.
Ensure the fuel line from fuel pump to the carburettor is connected & protected by fireproof sleeve.
Ensure that the fuel overflow line is in place, and secured to vent overboard. This is the small, clear hose
shown leading from the fuel pump in Figure 41.
Fit the oil over flow bottle to the firewall by drilling and Riveting oil bottle holder in place using 73AS 6-6
rivets. Refer to Figure 8.
Connect the oil breather line from the engine breather.
Ensure that the oil overflow line is in place and vents overboard.
Fit Scat hoses from NACA duct to Air Inlet Housing Assembly, from hot air muff to carburettor heat inlet on
the hot air mixer box and from the hot air mixer box to carburettor
– shown in Figure 44.
Fit throttle cable to carburettor. Note that Jabiru Aircraft kits come with a throttle cable cut to length and with
the correct end fitting attached. Engines used in firewall-forward kits will be supplied with a length of throttle
cable with no end
– the builder must cut the cable to length and fit the carburettor end fitting. 5/16” washers
are used on the cable end fitting (one washer either side of cable end fitting) to align cable. Use R-clip to
assemble. Figure 46 refers.
Fit choke cable to carburettor. Use an R-clip to assemble. Note that the fuel line from the fuel pump to the
carburettor passes between the choke and throttle cables. The choke is shown in Figure 7.
Connect the fuel balance tube from the nipple on the carburettor to a fitting on the filtered air side of the air
mixer box.
Fit cylinder head temperature (CHT) sensor. The CHT sensor used in Jabiru aircraft is a J-type
thermocouple. The VDO 310 980 Cylinder Head Temperature Gauge Kit is compatible with this sensor and
is installed as standard equipment in Jabiru Aircraft. Note that to ensure an accurate temperature reading it
is important to have the cold junction for the CHT (the plug between the stiff thermocouple wires and the
normal, plastic-insulated gauge wires) located away from the heat of the engine. Refer to Figure 22.
The Oil Temperature Sensor used is a VDO 320 028 which is located in the bottom of the sump as shown in
Figure 17.
The oil pressure sensor is located at the base of the oil filter and this can be seen in Figure 19. The sensor
used is VDO 360 001.
The exhaust gas probe used on Jabiru engines is a VDO 310 306 Pyrometer which is supplied as a
complete kit. The probe is mounted in a fitting which is welded to an exhaust pipe.
Note that this fitting is
not standard
. The installation of the fitting is best done at the time of order, though if required the exhaust
pipe may be returned to Jabiru and the fitting added. Note that in this case it will normally take around 2
weeks before the pipe is returned to you. The fitting is welded to the pipe 120mm down from the exhaust
manifold mounting plate.