The starter switch is designed to us a copper stud, which is under the switch and part of the starter. This stud wears as it is used to carry hundreds of amps. As it wears the switch also wears. When worn to the limit, the switch will be intermittent, then just spark, then not work. Some new switches are made with the mount holes too far away from the stud, causing even new switches to fail to operate. Test. Put the tractor in neutral. Lock the brakes and or block the rear wheels. Assure there is no open gasoline or leaks. Remove the negative battery cable from the starter switch and make sure it touches nothing. (a chunk of hose on it can be your friend) Remove the switch from the starter. Hold the big cable alone. remove the "hose", and firmly touch the cable end to the starter stud. It will spark radically but one of two things will happen. The engine will spin briefly (as you react and jerk the connection off of the stud), or it will continue to do nothing. If it spins the switch can be modified to widen the mount holes to allow it to reach the stud (about an eight of an inch ovaling of the holes). If it doesn"t spin loosen the starter from the engine (rubber hose on the cable end again) and wiggle it If you hear a spring like snap as the starter is loosened, you found the problem. The starter drive pinion needs to be replaced with a new and improved style with no big spring). If it made no sound and after tightening it still sparks with no starting, the starter is internally shorted. Repair or replace. Jim
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Today's Featured Article - Timing Your Magneto Ignition Tractor - by Chris Pratt. If you have done major engine work or restored your tractor, chances are you removed the magneto and spark plug wires and eventually reached the point where you had to put it all back together and make it run. On our first cosmetic restoration, not having a manual, we carefully marked the wires, taped the magneto in the position it came off, and were careful not to turn the engine over while we had these components off. We thought we could get by with this since the engine ran perfectly and would not need any internal work. After the cleanup and painting was done, we began reassembly and finally came to t
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