SIP Medusa Tank Cap with fuel extender

thingiverse

This is a filler cap for a SIP Medusa Ti-1002 Inverter Generator. It features a Johnson/Evinrude Outboard fuel connector to hook up an external fuel tank to extend the run time. This only works if the external tank is at least level or higher than the build in fuel tank and the fuel pump in the generator is in good condition. I have printed this in PC (Polycarbonate) which in my tests has withstood the petrol very well so far, tests with ABS showed that is will soften after only a few hours. Try other materials at your own risk. This is a "Cowboy Job" and I am sure Health and Safety wont approve. So use this at your own risk and take precautions in case of fuel spillage. You will need the rubber seal of the original filler cap. A link to the Fusion 360 design is here: https://a360.co/2Tls30M The thread for the fuel connector is supposed to be 1/4 NPT, I had to tinker around in Fusion 360 to find a working thread, I heated the metal of the fuel connector and screwed it on hot, it was VERY touch otherwise and might crack your print. The part number of the fuel connector is: Scepter 04068 Update 25/03/19: The tank does not work reliable if the fuel has to be pumped out, the fuel pump in the generator is to weak in the long run. I will attempt a gravity fed generator once I have a blind tank fitting.