Before I do any trouble shooting and i'll mention I didn't search the pages for an answer....51 side mount 8n...rebuilt engine, completely rewired correctly...no problems until yesterday. 12v EI, 12v round can coil from napa no resister required. diode is in line if I am remembering the correct tracotor....I went to start the tractor to hook up a small trailer to haul parts out of the shop to the new shed finally...First noticed when I turned the key on voltage was low...below 10v more like 9 it was in the red on the gage but I tried maybe 3 times to try to get it to pop off it fired once and that was it. I know the "special way" regarding choke to start it so I went back to assuming the battery drained a bit.. Hooked up the 12v charger for maybe 1/2 hr and she was fully charged. Turned the gas on...hopped on turned the key on and it was like someone bumped the starter button. Never heard it do that before. Shut key off turned back on....wot to clear the gas out and it started....my long story over now...gauge shows 14 v whilst tractor is running so I know alt is charging...but I don't understand why all of a sudden a drain. I have a boot covering the wire going to the starter button. battery terminals are bright and shiney. Restarted just fine after sitting and voltage remained good all day. So it must be a slow drain. No lights hooked up yet. Sorry if I jumped around in the post