Great Planes Giant Citabria 30cc/EP ARF - GPMA1435 - Manual (Page 20)

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5. Install a 2-56 ball link and 2-56 nuts to both the throttle
and the choke. Be sure to apply a drop of thread locker to the
threads on the ball link.
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6. To properly align the throttle linkage with the throttle
servo you will need to rotate the throttle arm 180°. Remove
the screw, rotate the arm, apply a drop of thread locker to the
screw and re-insert it.
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7. Make marks on the firewall where the throttle, choke
and fuel line will pass through. Remove the engine from the
stand-offs. Then drill a 3/16" [4.8mm] hole through the firewall
for the throttle and choke. Drill a 1/4" [6.4mm] hole on the
mark for the fuel line. (Check the diameter of your fuel line to
be sure that a 1/4" [6.4mm] hole is correct).
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8. Assemble the fuel tank stopper assembly with the fuel
tubes as shown. The easiest way is to first solder a fuel line
barb (not included) onto one end of all three tubes. We used
the 1/8" Dubro Fuel Line Barbs (DUBQ0670). Insert the tubes
into the stopper with the metal plates, and then solder a barb
onto the other end of the two short tubes. Bend the vent
tube and connect the pickup and fueling/defueling lines (not
included) to the short tubes. Connect the clunks to the Tygon
Fuel lines (not included).
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9. Install the fuel tank stopper assembly in the fuel tank.
Check that the clunks move around freely in the fuel tank.
Tighten the fuel tank stopper screw.