"IF" the engine is turning over but not starting, Try The Heet Treatment as gives is a sharp boost of Higher Rating than gas. It will also help keep water down in the gas tank.
If the engine doesnt turn over, it is the battery. If it turns over, check the charge idiot light, altenator. If it just go Clickity, clickity, it is the selanoid.
Well, since I am mechanically Challenged, ignor all of the aboer and get a Honda!