this morning i went out and started working on it again. first i sprayed some gas in and it sputtered. so then i filled the fuel filter up with new gas and after a few pumps it fired up then cut right back off, then i looked at the gas hand and it was at half a tank, but i only put about a gallon in it. so could it be that the old gas is bad, would that stop it from cranking? do you think it would help to fill the whole tank up with new gas?