Posted by John T on February 09, 2010 at 05:08:05 from (71.55.31.109):
In Reply to: J4 Magneto posted by Coax on February 08, 2010 at 19:45:20:
If its a mag grounding kill switch they are connected to the points.
THEREFORE when points are CLOSED Id expect:
Near 0 ohms (short) to case/frame/ground
when points are OPEN Id excpect
Very Low Ohms (0.25 to 1.5 ohms) to case/frame as thats the low voltage primary winding of the coil. (If open the coil is badddddddd)
AS BOB CORRECTLY NOTED BELOW
Id expect maybe 3000 to 10,000 ohms from the HV output to case/frame as thats the coils HV secondary winding. If its an open circuit its badddddddd
NOTE it takes a good ohm meter to read those real low ohms accurately as a cheap one may look like its zero ohms points open or closed. Use the R x 1 scale
MAKE SURE the grounding stud isnt shorted to ground nor the wire from it to the points
NOTE theres probably a condensor in paralell with the poonts connected to case/frame/ground. If its shorted out that kills the spark (and the ohms to case/frame will ALWAYS read zero points open or closed). If its totally bad/open she can still fire but a weak spark.
Stick a GOOD ohm meter on the low ohms R x 1 scale on the kill terminal and insure its NOT always a dead short and see if its near 0 ohms when points are CLOSED but 0.25 to 1.5 or so ohms when OPEN..........
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 - The Cletrac General GG and the BF Avery A - A Bit of History - by Mike Ballash. This article is a summary of what I have gathered up from various sources on the Gletrac General GG and the B. F. Avery model A tractors. I am quite sure that most of it is accurate. The General GG was made by the Cleveland Tractor Company (Cletrac) of Cleveland, Ohio. Originally the company was called the Cleveland Motor Plow Company which began in 1912, then the Cleveland Tractor Company (1917) and finally Cletrac.
... [Read Article]
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.
