I was given a 52"Bunton walkbehind. It has a Tecumseh XL engine on it (not sure what HP). Anyway, went down a fiddled with it today, it is store under a covering, but exposed to the cold. It was 15deg. today (very cold). I put gas in the tank, and sprayed starter fluid down the air intake. It would crank, and tun for 10 seconds, then die. What should I do?