Ok I have an old Scott Atwater motor. I can't find a replacement for the gas on/off control. I have tried the Scottguy and I have even checked lawn mower repair shops but they no longer make the piece that I need that accepts threaded tubing. All they offer is one that accepts rubber tubing. My question is (since I have a limited income and can not afford a newer more current motor) would I be able to run the rubber tubing inside the motor housing or should I set it up on an external fuel tank? I'm just worried that the heat from the motor might melt the tubing and leave me sitting in the middle of a lake with my trolling motor and paddle. Thanks for your help guys.