It won't run with 3 volts to the coil. With 3.5 volts it will try and run sometimes. Charge your battery so you have a good 6.3 or more volts after it sits for a while after charging. Good battery power is required. LARGE 6 volt cables, good terminal ends with clean ground connections. Don't forget when you see 3 volts at the coil sitting, when the starter is running the voltage will be lower. These engines are easy to flood and NOTHING happens when they flood. When starting DON"T press the gas pedal until it fires then gas and choke as required. Don't pour gas down the carb use starting fluid. Crank the engine with the throatle plates slightly open as it is cranking give it a good shot of fluid and if it starts to die give it another short shot and repeat until it picks up gas. If it won't stay running without the fluid you have a fuel supply problem. The modern gas eats the old gas hoses. I have seen MANY that have small holes that don't leak gas that is visiable but sucks air and won't run, this can also be intermitant. Sometimes a close examination of the hose will show a wet spot but don't remain there long. Dirt in the gas tanks is also a problem. Bob Shewman
[email protected] makes hoses that the new gas won't effect. G.M.