hook my tower hobbies deluxe 12v to an 18v power source? just like on the .40 and .60 size engines that use the pressure from the exhaust to pump fuel, the carb pumps the fuel, so there are two hoses coming out of the front of my fuel tank, one with the clunk connected to it going to the fuel nipple on the carb and the other has the bent brass tube that points up in the tank and it is going to the pump outlet on the carb. is that not right? if i assembled it the way i think you are saying to i would have the hose that is attached to the bent brass tube venting free to the air and the other hose attached to the clunk going to the fuel nipple on the carb, and that would be the only hose that is attached to the engine/carb. if that is the case then how does the fuel get pumped into the carb? does it have a draw on the fuel or does that other outlet on the carb pump air into the tank to pressurize it?