|
John Deere Tractors Discussion Board |
Re: Ignition coil polarity question?
[ View Follow Ups ] [ Post Followup ] [ Return to John Deere Tractors Discussion Board ]
Posted by clooney on April 18, 2000 at 13:21:26 from (207.16.59.151):
In Reply to: Ignition coil polarity question? posted by Mr. B~MI on April 18, 2000 at 09:25:49:
Mr. B~MI, how you doing bliss? You have been given a couple of good answers by Dave & Buckeye Al. Let me put another spin on it. It is the same as changing the polarity on an +/-DC welder. When you change the polarity on the low voltage side of the ign. coil you also change the polarity on the high voltage side. Shouldn't make a difference right... Wrong, when the spark jumps from the center electrode to the ground electrode it is jumping from a sharp edge to a blunt object. Like a DC welder on dc(-). When the polarity is reversed the spark jumps from a flat surface to a sharp object, #1 that takes more Kv to go that direction, #2 just like a DC welder on dc(+) it softens the spark (arc)& melts the electrode easier( burns it & dulls it easier). The more the center electrode is dulled the higher the kv has to be to jump the gap. The same rule applies to the rotor in the mag. or dist. If the spark jumps towards the rotor side electrode it errodes it quite quickly, and makes a nice shower of sparks to boot. These same principals apply to old spark plugs, just re-gapping won't do you also have to file the center electrode flat to remove the round edges.
Follow Ups:
Home
| Forums
Today's Featured Article -
Engine Valves - Some Helpful Information - by Staff. Intake - On the intake stroke the piston moves doward, sucking in carburized fuel through the open intake valve. Exhaust valve is closed. Compression - With both the intake and exhaust valves closed, the pistons upward stroke compresses or squeezes the fuel into the combustion chamber. Firing - Ignited by the spark, the compressed fuel explodes and forces the piston downward on its power stroke. Intake and exhaust valves are closed. Exhaust valves and seats are exp
... [Read Article]
Latest Ad:
Oliver 550 Diesel runs like a watch three point hitch pto engine gone threw about two hundred hours ago nice clean tractor
[More Ads]
Copyright © 1997-2024 Yesterday's Tractor Co.
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. Yesterday's Tractors - Antique Tractor HeadquartersWebsite Accessibility Policy |
|
