Lets think this through (I have questions later, hold on)
I don't see why a lawn mower coil magneto couldn't be made to work (but see caveats later). As long as a magnet, be it North or South Magnetic Polarity, passes fast enough by a coil of wire, a voltage is induced into the coils LV Primary which can be increased over in a HV Secondary AND THAT OCCURS IN A TRACTOR MAG when the points break/open the LV Primary current flow and the field collapses (so transformer action takes place). On the Wico its best for the points to break open at the time the primary current is at its max and that's 0.090 after the rotor magnet passes out of the armature laminations i.e the famous EDGE GAP SETTING which is APPROXIMATED by setting the points gap to 0.015
Now, if on the lawn mower single cylinder engine flywheel there were 2 magnets instead of 1, you would get a spark each time right. On the Wico Mags there is obviously a North and South end on the magnetic rotor so each spark is of opposite polarity BUT THAT DONT HURT THEY STILL WORK THAT WAY NOT withstanding how its best for the electrons to jump from the hotter tip to the cooler plug electrode but that's a whole other topic.
BUT on those small engine coils that mount by the flywheel that have the HV plug wire coming out of them IS THERE SOME ELECTRONIC SWITCHING GOING ON (replaces points open n close) which would be polarity sensitive therefore they may NOT work at opposite polarity???????????? I'm asking OR Is it simply that a sudden primary voltage spike occurs and as its diminished the magnetic field collapses thereby HV gets induced over in the secondary WITHOUT ANY NEED FOR SWITCHING?????????
Another question if you put 2 magnets on a single cylinder engine flywheel 180 apart CAN THEY BE THE SAME POLARITY I dont see why not. I don't really understand (never thought of it) if the magnets on the lawn mower engine flywheel are N one side and S the other or just what they are???
Soooooooo not an answer but just questions sorry Bob lol
REGARDLESS Ive still NEVER seen a direct bolt in replacement elec switched unit to replace an old tractor magneto, have you??? Sure they produce their own energy, but a solid state switching device uses bias and polarity sensitive energy that usually comes from a DC battery instead of a rotating reversing polarity more like AC Magneto, so I'm curious to see how they work and wouldn't bet a dime they're really out there like the good gents Walt n Old suggest?????IM NOT DOUBTING THEIR WORD, JUST LOVE TO SEE ONE
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 - Restoration Story: Fordson Major - by Anthony West. George bought his Fordson Major from a an implement sale about 18 years ago for £200.00 (UK). There is no known history regarding its origins or what service it had done, but the following work was undertaken alone to bring it up to show standard. From the engine number, it was found that this Major was produced late 1946. It was almost complete but had various parts that would definitely need replacing.
... [Read Article]
Latest Ad:
1964 I-H 140 tractor with cultivators and sidedresser. Starts and runs good. Asking 2650. CALL RON AT 502-319-1952
[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.
