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Section 11: Assembly and Installationof the Fuel TankParts Needed• Clunk (fuel pickup)• Fuel pickup tubing• Fuel tank• Plastic caps (2)• Rubber stopper (gas/glow)• 3mm screw and nut• Fuel tubing (3 ft)Tools and Adhesives Needed• Hobby knife• Phillips screwdriverStep 3. Locate the tank stopper and insert the 2" metal fueltube into one of the open holes in the stopper so that an equalamount of tube extends from each side of the stopper. This tubewill be the fuel tank pickup that provides fuel to the engine.Note: The stopper provided with the J-3 <strong>Cub</strong> can be usedfor gasoline or glow fuel. Also provided are two types offuel tubing used for the clunk attachment inside the tank,neoprene (black) for gas engines and silicone (blue) forglow fuel engines. You will need to supply 3 feet of theappropriate fuel tubing for your engine selection.Step 1. Locate the fuel tank and related parts.Step 4. Slide the smaller of the two caps over the tube on thesmaller end of the tank stopper. The small end will be insertedinto the fuel tank. The larger cap is placed on the other side ofthe stopper. Loosely install the 3mm screw through the large capand stopper and into the small cap and nut.Step 2. Cut one of the metal fuel tubes to an overall length of2" with a tubing cutter. You can also cut the metal tubing with asharp hobby knife, carefully rolling it back and forth over a hardsurface using medium pressure until it breaks. De-bur the end ofthe tubing after it is cut.Step 5. Locate the other metal fuel tube and bend it usingyour fingers as shown. This will be the fuel tank vent tube. Usecaution not to kink the metal tubing.36
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