you need a standard 5 litre petrol plastic can and a spare cap, and some small diameter tube steel or copper and 2 rubber grommets that fits tight on the tube. Drill the cap twice opposite each other so the grommet fits in. Cut a small piece of pipe about an inch to use as a breather and push it into the cap. Pus the remaining tube through the cap making sure it reaches the bottom of the can. Connect the end of the tube to an outboard fuel line with primer bulb.Then when you have finished unscrew the cap off and replace with the sealed one that came with the tank.