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Re: Super MTA won't start
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Posted by john d on March 05, 2000 at 10:19:43 from (206.141.74.34):
In Reply to: Super MTA won't start posted by Randy on March 05, 2000 at 00:22:26:
Okay.....let's eliminate some possibilities. If it quit very suddenly, you may have a loose connection somewhere, or a broken wire. On a tractor of that age, either could happen. The fact that it was running indicates that the systems were functioning fairly well, or it wouldn't have started. A broken connection somewhere would indeed act as if it were switched off! Since it's a 12 volt system, check the "ballast resistor" that has been installed somewhere in the primary side of the ignition, probably between the switch and the coil. A bad connection can occur there, and those resistors do sometimes go bad. The "black box" with 4 wires coming out, is this a ROUND black box, by chance and located on the right side of the engine below the coil? If so, that's the distributor. If it's not round, then you've got some sort of aftermarket ignition system, and without a LOT more information, to go on, it's pure guess work. If it's the distributor, it should have a primary (small diameter) wire from the coil, and a secondary (large diameter) wire from the end of the coil to the center of the distributor where the 4 sparkplug wires come out. If the coil is okay, there should be power going to the distributor through the primary wire. The distributor has "breaker points" in it which act as a switch to interrupt the flow of electricity in the primary coil circuit. This interruption causes the magnetic field in and around the coil to expand and collapse rapidly, providing the spark which goes to the center of the distributor cap and gets "distributed" to the individual spark plugs. If the points are badly burned, that's a likely cause of your problem. There is also a condensor (capacitor) located in there, and it should be replaced if you change the points. They do go bad sometimes, but are generally pretty durable. There is also a "rotor" inside the distributor cap, which is easily replaced and will likely be included in a tune-up kit which has points and condensor. It's going to be a case of tracing voltage to see where the power is going, looking for loose wires, finding defective parts, and the usual headaches of trial-and-error troubleshooting. Good luck, and don't hesitate to post again with more information, results, or questions!
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