1-wire alternators are a hit-or-miss proposition on discharging.
Some will discharge the battery while sitting, some won't.
With a 3-wire setup and a proper diode, you are 100% guaranteed that the alternator won't discharge your battery.
The diode is EASY, all you need to do is go to radio shack and buy the biggest diode they have in the electronics drawers. They come in packs of two.
Back at the tractor, cut the wire running to the #1 terminal on the alternator somewhere convenient, and strip the ends. You don't have to solder the diode. Use wire nuts and tape if you want. Connect the diode with the end that has the line pointed toward the alternator.
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Today's Featured Article - Pitfalls of Tractor Engine Rebuilds - by Chris Pratt. The first pop after you have put the machine together with your own hands is exciting and pleasing. The whole experience can be marred if one moves too fast and makes too many assumptions that they can just use "as is" some parts they should be closely scrutinizing and possibly attended to. In such cases, rework makes what could have been a fun project turn into an irritant or even a nightmare. Minor Irritants To give you an example of an minor but irritating proble
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