CARL GOLDBERG 120 ARF Instructions Manual page 18

FUEL TANK ASSEMBLY
1. Gather the following items
(1) fuel tank
(1) rubber tank stopper
(1) clunk
(1) 3mm x 25mm screw
(1) cap washer large
(1) cap washer small
(1) 3mm x 40mm brass tube
(1) 3mm x 60mm brass tube
(1) silicone tube 4mm x 80mm
Insert the 3mm screw through the center
2.
hole in the large washer, through the center
hole in the rubber washer against the large
side, and screw the small washer on the
back side.
Decide if you want to use a two line or a
three line tank. Most two strokes use a two
line, one to the carb and a vent tube to the
pressure fitting on the muffler. You can get to
the carb line to remove and fill through.
On most four strokes you cannot get to the
carb easily so plumb a third line into the tank
to use as a fill line. You will fill through it then
plug it for flight. The carb line will stay con-
nected all the time.
OUTFITTING THE FUSELAGE
3. Insert the brass tubes through two or three of
the holes. They should be arranged so as the
long one (vent tube) will be on the right side
of the plane and the short one on the left
side.
The tubes should extend out the front of the
cap 5/8". Bend the long tube up at about a 20
degree angle. This should be adjusted so the
end of the tube almost touches the top of the
tank when installed.
Install the 4mm silicone tube to the short
4,
brass tube and install the clunk to the other
end of the silicone tube. This is the fuel pick-
up and must be free to "flop" around in the
tank so it can pick up fuel in any attitude.
5. Install the assembly into the tank so the vent
tube is turned up to the top of the tank and is
positioned on the right side of the tank.
Tighten the screw to expand the rubber cap.
Don't over tighten or you could split the tank.
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