(quoted from post at 08:16:21 08/03/08) Vreg rft6a5 vroogr,
t is unclear to me what you are trying to say here. I guess some of it is what you copied off the voltage regulator but I can't parse out what is.
Your starter is the correct 6-volt starter.
The pull/push switch is the ignition switch. If you leave it on for long the coil will get hot (as for example while you spend an extended time trying but not succeeding to get the starter to turn the engine). The rotary switch is for the lights, probably 4 positions on this tractor. Just leave the light switch OFF (extreme left position) until you get the engine running. The PTO lever is in the FORWARD position to disengage it. Leave it disengaged until you get the engine running. It has no effect on engine starting or operation.
You bought it not running? Have you ever seen this engine run? Have you ever seen it turn?
If the previous owner was pull starting it, does that mean the starting system was known to be a problem?
You had a mechanic come out that changed 3 spark plugs? Did he try to start it? What happened? What did he say about problems with it?
I wonder if the engine is stuck. Have you tried engaging the starter with the clutch pedal down? If the engine isn't stuck, is the transmission stuck in 2 gears? Can you push the tractor by hand when it isn't in gear? When you tried to pull start it, did you start out with it in gear and the clutch down, or just try pulling it in gear? If the clutch is down, it should easily pull with both wheels turning, even in gear.
The 3 wires at the back of the battery box are for the rear light. Ignore them until you get the engine running. The wiring of this tractor is probably a little different from the diagram I pointed you at. There are ground wires for the lights and the rear light was probably a combination red/white light that required 2 wires from the light switch. The 3 wires are for red, white and ground. The other end of the ground wire should be grounded and if you hit it against the hot battery terminal you will get a spark (and possibly an explosion so don't do that).
Does the ammeter (the gauge next to the light switch) move when you turn the ignition switch on? If so which way? If it moves to the right, reverse the battery connections. Look on the coil. The 2 terminals should be labeled + and -. The black wire that comes from the distributor should be on the + terminal and the orange one on the -. If you switch the battery around, make sure the coil wires are as I stated and you will at least have one thing straightened out.