Fuel Tubing and the Nitro RC Fuel System

Although silicone tubing used in nitro engines has many auxiliary uses, it's primary use is to deliver fuel. A typical nitro engine has two lengths of tubing. One runs from the fuel tank to the carburetor (sometimes with an inline fuel filter in between). Another piece of tubing, called the air pressure line, runs from the fuel tank to the exhaust or tuned pipe. It helps to pressurize the fuel tank so that the fuel flows better through the fuel line to the carburetor.