User Manual

Step 5. Locate the piece of silicone fuel tubing and metal

clunk. This tubing will be attached to the clunk making up the

fuel pickup inside the tank. Insert the metal clunk into one end

of the fuel tubing.

Step 6. Install the open end of the fuel tubing onto the fuel

pickup tube.

Step 7. Insert the 3 mm screw into the large metal cap.

Compress the caps/stopper together and screw the 3 mm screw

into the smaller metal cap. Tighten just enough to hold the

assembly together.

Step 8. Carefully insert the stopper into the fuel tank. Position

the stopper so the vent tube is pointing to the top of the fuel

tank. The vent tube must point to the top of the tank for the fuel

system to function properly. Also, move the tank around and up

and down to observe the movement of the clunk. It should move

freely and not hit the back of the fuel tank. The fuel clunk must

be free to move regardless of what attitude the aircraft takes, thus

ensuring it is in the fuel at all times. If the clunk does not move

freely, trim a portion of the fuel tubing to shorten the length and

try again.

Step 9. When you’re satisfied with the movement of the clunk

and the vent tube is properly positioned to point to the top of the

tank, tighten the 3mm screw so the caps move toward each other

and compress the rubber stopper in the tank stopper opening.

This compression will help seal the stopper into the tank opening.

Important: You should mark which tube is the vent and

which is the fuel pickup when you attach fuel tubing to the

tubes in the stopper. Once the tank is installed inside the

fuselage, it may be difficult to determine which is which.

Step 10. Wrap the fuel tank in foam. This is done to provide

support for the fuel tank, and help reduce vibration. Attach fuel

tubing the tank tubes and feed the tubing through the hole in the

firewall as you slide the fuel tank into the area behind the firewall

in the fuselage.

Note: Remove the fuel tank when drilling the hole for

the throttle linkage to prevent accidental puncturing of

the fuel tank.