Carbon powder can get out of the ends of the fiberglass threads.After enough is gone an arc will start opening a gap in the wire.I have found many wires that read open.Test sets have a wire test function.The reading can predict that a wire is failing It has been considered bad practice to let a magneto fire into an open circuit because the secondary winding can arc to it self.You can hear a fence charger secondary arc to it self.A normal fence line loads the charger enough to keep the voltage peaks down.Fence chargers are run after repair with a 500 ohm load for testing.The Model T coil I use for testing has its own spark gap.No engineering but I have three 5 gallon pails of bad fence charger transformers in the shop now.All have been damaged by lightning or running on open circuits.New chargers are starting to have spark gaps in the case.No reason to have fake wire on tractor ignitions.
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Today's Featured Article - Trailering Your Tractor - by Curtis Von Fange. One of the fun things of summer and fall are the parades and tractor shows that go on across America. Many owners of tractors travel long distances to attend these shows and they usually take their restored iron along with them. Safe trailering practices and inspections will ensure that the event is a fun one. A good habit to develop when using a trailer is to give that �quick look over� before taking it on a trip. Before hooking up to it check the tongue for proper operation. The latche
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