Posted by Steve@Advance on October 21, 2018 at 13:34:06 from (66.169.147.211):
In Reply to: good then weak spark posted by pinball on October 21, 2018 at 08:17:53:
Do you have a volt/ohm meter?
Check the ohms across the coil, out of circuit. If 1.5 ohms, it needs a resistor. If 3 ohms it does not need a resistor.
Go by the readings, not what was on the box or the part number unless it is clearly labeled on the coil itself. Many times coils get reboxed, shuffled from store to store, as they are no longer a fast moving item.
Next check the voltage at the ignition switch side of the resistor. It should be near battery voltage, switch on or cranking. If it drops below around 9 volts while cranking, there is not enough left to make a good spark. If the engine spins normally could be a bad ignition switch or high resistance connection between the switch and the resistor. If the engine is turning slowly, could be low battery, bad connection, bad starter, too small battery cables.
If that all checks good, move the volt meter to the - side of the coil. with the ignition on, the points open, should have battery voltage to ground. With points closed should have zero volts to ground. If the points are closed, and have any voltage at the coil - terminal, the points are not making connection, or a bad connection from the coil to the points, or the distributor is loose and lost it's ground.
Upload one or more videos to your post. Photo and video filesizes should be less than 5MB. Formats allowed are gif, jpg, png, ogg, mp4, mov, and avi. Be sure to use filenames without spaces or special characters, and filetypes of 3 digits lower case.
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.
