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Re: 6 or 12 v coil ???
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Posted by John T on July 31, 2007 at 19:03:19 from (66.244.83.147):
In Reply to: Re: 6 or 12 v coil ??? posted by Allan In NE on July 31, 2007 at 17:03:45:
Allan, NOT to be a smart alek or nuttin but simply to help others, heres some info for yall: A generic tractor starter is a series wound DC motor with the armature n field wired in series and a 6 volt starter will have different current ratings then one designed for use on 12 volt. As we all know, however, you can use 12 volts on a 6 volt starter n provided you dont let it crank too long n overheat thay can last a long time other then perhaps premature bendix wear from the higher kick in torque. HOWEWVER if you use 6 on a 12 volt starter she wont work worth a dern lol. A 6 volt coil IS NOT same as a 12 volt coil. A typical 6 volt will have around 1.5 ohms of primary resistance as measured between its lil + and - terminals while a 12 volt coil (some call internally ballasted) will have more like 3 ohms. If you use 12 volts on a 6 volt coil it will run too hot and the points burn up soon and likewise, if you only use 6 volts on a 12 volt coil it will yield a weaker spark. There is some truth in your statement since a coil is more of a current then a voltage device. Its the current passing through the primary winding that develops a magnetic field in which energy gets stored and why (GIVEN the correct current) a 6 volt coil can develop a spark of sufficient energy just the same as a 12 volt coil can..... Moral of story, they reallyyyyyyyy arent the same. Hope this helps, God Bless n yall take care now John T
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