Posted by JMOR on July 02, 2015 at 22:56:11 from (72.181.168.203):
In Reply to: positive ground posted by bruce from Can. on July 02, 2015 at 19:01:15:
ShadetreeRet said: (quoted from post at 00:23:09 07/03/15) John T. It has always been my understanding also, that if you connect a coil with polarity reversed, it will cause the points to burn faster. Never went to the trouble to research this theory, I just connect them as per instructions, because electricity and automotive electricity in particular drive me nuts anyway.
It does not matter. As Bob said, every other spark in a magneto is of opposite polarity, & with today's modern "wasted spark" ignition systems & all the old H-D cycles you had a mix of spark polarities. This topic is useful only to excite discussion, that is about it! Take a given coil & engine, wire it one way and get the negative spark polarity on the center electrode that all want for the "thermionic emission" reason, or wire it such that you get a positive spark and a higher voltage (by maybe 200v out of thousands).....what do you want? Doesn't matter! By the way B&D's idea that it matters in a cold weather start holds no water or ice, as thermionic emission won't come into play until the electrode is hotter than Hades!
Oh, & I shouldn't forget to address "energy". Energy in an inductor (coil) is inductance times current squared divided by 2. Guess what? The current is the same, no matter which direction that it flows. Therefore energy = energy, regardless of connections.
This post was edited by JMOR at 23:14:06 07/02/15.
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]
Today's Featured Article - Listening to Your Tractor - by Curtis Von Fange. Years ago there was a TV show about a talking car. Unless you are from another planet, physically or otherwise, I don’t think our internal combustion buddies will talk and tell us their problems. But, on the other hand, there is a secret language that our mechanical companions readily do speak. It is an interesting form of communication that involves all the senses of the listener. In this series we are going to investigate and learn the basic rudimentary skills of understanding this lingo.
... [Read Article]
Latest Ad:
2022 John Deere 5045E, 4wd, front end loader and 3rd function with grapple. 120 hrs, 55k new, must sell
[More Ads]
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.
