Posted by John T on December 11, 2010 at 06:21:51 from (66.244.97.31):
In Reply to: starts AFTER cranking posted by realolman on December 11, 2010 at 04:18:33:
Real, my answer has to be IT DEPENDS:
Id say the coil voltage is too low due to excess voltage drop while cranking, and that could even be a weak battery problem. Have the battery LOAD TESTED to see how much its voltage drops under a heavy load.
Another cause of excess voltage drop might be a bad starter thats drawing too much current!!!
Another cause may be a bad cable or connection, Id remove, clean n wire brush n reattach each n every battery n starter n ground n switch/solenoid connection then try it (after battery has also been load tested)
Another problem may be a bad (resistive) ignition switch. Try hot wiring her, see below
NOW if none above are the causes, lets explore further:
1) If????? you have a 6 volt coil and an external series voltage dropping (12 to 6) ballast resistor PLUS some sort of ballast by pass that supplies unballasted battery voltage to the coil ONLY WHILE CRANKING, Id say that switch or its wiring or connection has failed. If its working, ONLY while cranking the ballast is by passed around for a hotter starting spark. I owned those tractros years ago but didnt think they had any ballast by pass circuit or system so I doubt this is the answer !!!!
2) If its a 6 volt coil and an external series ballast (more likely then above) that has no ballast by pass system, perhaps the ballast is too high ohms to properly match the coil i.e. theres insufficient coil voltage ESPECIALLY WHILE CRANKING. If you turn on the ignition and the points are closed a volt meter on the coils input (NOT to distributor) terminal should read like 6 to 7 volts (if its a ballast system and 6 volt coil) but if it reads like 5, THE BALLAST IS TOO HIGH IN OHMS.
BOTTOM LINE I suspect is theres low voltage on the coil while cranking (bad battery or starter or connection) or else the ballast is bad (too high ohms) or else the ballast by pass isnt working (but not sure it even has that) or esle theres a high resistance bad ignition switch?? Maybe try hot wiring to the coil n see how she does then !!!!!!!!! If she starts okay then I suspect a faulty (resistive) ignition switch or some of its wiring or connections.
On that 12 volt tractor you need either a 12 volt coil or a 6 volt coil with the external series voltage dropping (12 to 6) ballast resistor YOU MAY HAVE THE WRONG COIL OR AN INCORRECT SIZED BALLAST
Theres more that may be wrong, but this is plenty to get you started, let us know what you find
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