Might be frozen. If you have filled it recently you may have water in there. Some stations are bad about removing water out of there fuel. I always add seafoam or the like to my tank in the winter. Does it crank over good? If not, batteries on there last leg love to die in this cold. Your oil might be too heavy of a weight for this time of year also. Makes it hard to start when it is like honey. You might just need to warm it up, get it started, to get the seafoam through it and change the oil to a winter weight.