Nothing. If the generator was tested it is polarized. If it was used in a vehicle it is polarized. If it has been sitting for years not used, the residual magnetism in the field iron cores might have dwindled to the point that it will not self start from lack of that magnetic force in the iron. Polarizling just puts that magnetism back in the field core (not the windings, the iron they are wound on) If a generator is switched from Pos ti Neg, polarizing is all that is needed to make it switch. You have been lucky, is all. Jim
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Today's Featured Article - Fasteners: The Nuts and Bolts of Nuts and Bolts - by Curtis Von Fange. The nuts and bolts of nuts and bolts is an interesting and essential piece of knowledge that applies to our older tractors. An improperly torqued capscrew on an engine head or a shear bolt that is too hard on the driving shaft of a bushog can create havoc and make an expensive and uncalled for repair. Let�s examine the purpose and design of these fasteners in order to ensure their proper use. Fasteners are probably one of the aspects of mechanics that is given the least amount of thought.
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