The way you start a weed eater depends on the type you have. It could be gas-powered or cordless. If a gas-powered heater, you have to check that the tank has gas. Turn on the switch, followed by the choke. While pressing the purge valve, pull the cord. That sequence of actions will get the engine running. Starting an electric weed eater, whether corded or cordless, is a little bit different. If corded, you have to plug it into an outlet. A cordless one will have a rechargeable battery. Once it is plugged in or you are sure the battery is charged, simply pull the trigger to start the machine.