Instruction manual

37
clunk, always maintain the exact length of 73.0mm. Frequency of service should be every six to ten gallons of
fuel burned (depending on the variables mentioned).
B. Insert the prepared fuel pick-up tube, clunk and fitting (from inside the tank) out through the hole supplied in
the side of the tank and secure with one #0409 90 degree external tank fitting. Tighten securely resulting in
the 90 degree fitting pointing rearward. A 5.5mm hex is provided on the pick-up fitting to aid in tightening.
Install the #0405 vent fitting in the top of the tank and secure it with one #0011 washer and one #0013 hex
nut.
C. Thoroughly blow-out the inside of the tank to remove any debris and install the cap. Screw the cap in place
with light pressure
until it stops and then turn it one-eighth turn further.
Step 2: Installing the Fuel Tank
Parts Required: Bag #
1 #115-64 Two-sided Velcro (13.0x330.0mm) 8
1 #0397 Medium fuel tubing (483.0mm plus) 8
Refer to Drawing #8B
A. The tank position is critical for canopy clearance. Examine the drawing and note the orientation of the tank to
the mechanics. Note that a small Anotch@ is provided on the right side of the #122-26 tank plate B the #0405
vent fitting, installed in the top of the tank, will center directly within this Anotch@ when the tank is correctly
installed following the next procedure.
B. Select the #115-64 two-sided Velcro strip. Note the slot on the tank plate, just outside the main frame, on
each side. Working from the right side of the model, push the end of the Velcro strip downward into the first
slot, under the midpoint and the frames and up into the slot on the left side of the model. Adjust the position
of the Velcro so that, when pulled taught and straight outward on each side, there is 67.0mm (2 5/8@) of
Velcro strip outside the right
hand edge of the tank plate.
C. Remove the protective covering from the two-sided tape on the bottom surface of the tank plate. Clean the
top surface of the tank with alcohol. Align the tank, as indicated, under the tank plate and press firmly
upward. ( The tank will be slightly off centered) Pull the Velcro strip tightly as you wrap it around the tank
(slightly compressing the tank sides) and overlap itself on the right side of the tank. The grip of the two-sided
tape onto the tank will increase within a few hours.
D. All cuts to fuel line should be made using a sharp modelers knife or razor blade. Select the #0397 fuel tubing.
Cut one piece 205.0mm (8.07@). Attach this piece to the fuel pick-up fitting on the left side of the fuel tank.
Install a fuel fitting at the other end. Determine the remaining length from fuel fitting to carburetor by holding
the fuel filter in-line with the carburetor inlet at a distance from the tank that forms the connecting fuel tubing
in a natural arc as it exits the tank fitting. After making the connection to the carburetor, the fuel tubing
should sit naturally without sagging more than 25.0mm (1.0@) or creating sharp bends.
E. Complete the tank installation by connecting the tank vent to the exhaust pressure fitting (excluding Y.S. 91
& Y.S. 80). The final tubing length should not interfere with the main gear nor create any sharp bends. It is
highly recommended that you add a fuel filter to the exhaust pressure tube to minimize any debris coming
back into the fuel supply. Note: Due to its proximity to exhaust heat and combustion by-products, the
exhaust pressure tubing will require periodic replacement similar to the fuel pick-up tubing within the tank.