Value Hobby TWEETY - 25 Instruction Manual - page 16
Installing the Fuel Tank (only if you use
nitro motor)
12 mm
Step 1: The fuel tank can be assembled as a two line
system consisting of a vent (pressure) line to the muffler
and a carb line. Filling and emptying of the tank would
need to be done through the carb line, or an optional fuel
fill valve. The tank can also be assembled as a three line
system having a vent line, carb line, and fill line. If
installing a fill line, puncture the top of the stopper above
the sealed off fuel tube hole. The fill and carb lines should
extend out 13mm beyond the stopper and the vent line
should be bent upwards and left uncut. With the tubes
installed in the stopper, the stopper plates loosely in place
with the PM3x25mm screw to hold the assembly together.
To p o f t an k
Ven t
Fill an d carb lin es
Step 2: Fit the stopper assembly into the tank with the
vent line pointing toward the top of the tank, but not
touching. The fuel tubing and clunks (fuel pickup) on the
carb and fill lines should almost reach the back of the tank
but not touch. The clunks must be able to move freely
inside the tank when assembled. Adjust the length of the
fuel tubing accordingly. When satisfied, tighten the
PM3x25mm screw in the stopper to secure it in place (do
not over‐tighten). Mark the side of the tank that must face
up when installed in the plane. We also suggest marking
the tubes in the stopper.
Step 3: Insert the tank into the fuselage with the correct
side facing up. The fuel tubing should be routed through
the hole in the center of the firewall.
Installing the Nitro Motor (only if you
use nitro motor)
Step 1: Test fit your engine between the wood engine
mount rails. Check the position of the engine for
necessary offsets.