If I attach a auxilary battery to the vehicle battery, the machine will run until the auxilary battery is dead. All of the electronics work while the auxilary battery is charged. Any ideas?

 

welcome to the forum. did you do a voltage check to see what the voltage is? sounds like it could be the recifier that is bad or maybe bad/corroded connection. the recifier is what controls the amount of voltage put out. if that is not the problem then my guess the stator is the isue. check connections first guessing, but it should be mounted up under the front end, it's square and thin and has most likely 4 or more wires plugged into it. hope this helps.