So, besides the battery what could the problem be? It did run out of gas and I left it out overnight with the key on the "on" position. So that's why the battery went dead. The display works though so there is some power in the Diehard battery. I have also tried starting it with one of those starter packs like you use to start a car that has a dead battery. I guess I could check the plugs but don't know why they'd both go bad all at once. What would be in between the battery and the spark plugs?