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Jabiru J450 Constructors Manual
Post-Paint>Fuselage>Firewall forward>Final assembly
Tuesday, April 6, 2010
271 of 343
Connect the inlet air scat hoses
Air is fed into the carburettor from 2 sources,
cold and heated, through the air mixer box on
the firewall and then into the carburettor air
inlet. In each case a scat hose is used to duct
the air and each scat hose is held in place
with hose clamps.
Start by connecting the air box outlet to the
carburettor air inlet: remove the red sealing
plug from the carburettor and connect the
curved fibreglass inlet fitting to the mouth of
the carburettor and secure with a hose clamp,
then cut a short length of scat hose to fit
between that fitting and the air box outlet and
fit it into place. The scat hose should be
routed in a smooth curve between the 2
fittings as shown in the photo at right.
Fit a length of scat hose to the outer air inlet
fitting on the air box, then hold the lower
cowl in position and cut the scat hose to
length to fit the cold air inlet fitting on the
left-hand side of the cowl. Remove the cowl
and set aside for later fitting.
Run a length of scat hose from the fitting on
the left rear of the muffler to the front fitting
on the air box.
Inlet air ducting viewed from the right hand side
Muffler
Heated air
Carb inlet
Inlet air horn
Engine bay viewed from above showing the inlet air hose arrangement
Carb inlet
Cold air
Heated air