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Big Hunter, A 6 volt battery has 3 cells while a 12 volt battery has 6. Does it have 3 (6 volt) or 6 (12 volt) single fill caps??? Even on batteries that have one or two larger caps that cover more then a single cell, if you remove that cap you see how many cells are under it, PIECE OF CAKE TO DETERMINE..... .... Or else place a volltmeter on it, a full charged good 6 volt batetry should measure around 6.3 volts while a 12 volt battery 12.6. If it reallyyyyy y ?? has an alternator versus a generator theres a darn good chance its 12 volt and also its most likely negative ground..... NOWWWWW WWWW there appears to be some confusion below regarding the direction of rotation in DC motors. On smaller "permanent magnet" motors if you reverse polarity THEY TURN DIFFERENT DIRECTIONS cuz the current flow direction and resultant electromagnetic North/South polarity changes in the armature, BUT NOT in the fixed permanent magnet Field. HOWEVER in a typical larger higher torque car or tractor starter motor, they ARE NOT permanent magnet motors, but instead use current in the field windings to create the electromagnetic Field. ON THOSE THEY TURN THE SAME DIRECTION REGARDLESS OF POLARITY THE REASON so is the "permanent magnet" motor has a fixed North/South magnetic polarity (its like a regular magnet) making up the magnetic Field in which the armature rotates, while in the electromagnetic field DC motor (car or tractor) the direction of current flow through the Field windings determines the resultant magnetic North/South polarity in which the armature rotates. Buttttt ttttt even if you reverse polarity you reverse the current flow (and resultant magnetic polarity) in BOTH the Field and Armature so the magnetic attraction and repulsion (which causes rotation) forces remain the same n she still turns the same direction regardless. If you wanna reverse direction in those motors (make it a reversible motor) you have to physically swap ends of ONLY ONE winding so the curent flow and resultant magnetic polarity is reversed and then it turns the opposite direction GET IT ????? ????? ?? Im a lil rusty on DC motor theory but fairly sure this is correct, my old buddy and still practicing engineer Gerald J is very good on DC motor theory, so if I misspoke I hope he can correct me. Best wishes yall n God Bless John T Longgggg g retired n a lil rusty engineer
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