John Athey
Member
My H won"t fire - no spark. It has a magneto. Where do I start to look for the problem. One day it was running fine and just cut off. Any advice?
- Thread starter John Athey
- Start date
Janicholson
Well-known Member
The following assumes the impulse coupling is working (clicks when cranked)
Pre-disassembly before servicing points: remove the wire attached to the side and see if it runs, if so the switch is bad, or the wire is grounded. it is a grounded kill switch, not power.
First realize that setting it on TDC #1 on compression allows a known position from which to work.
Remove the cap and make sure the rotor is pointed to #1 cap tower terminal attached to #1 plug. Next remove the rotor block and rotor from the body of the mag. This is geared to the breaker cam shaft and is timed with marks and must go back where it was.
The points are now exposed. Dress the points with a piont file, needle file, or 320 grit paper over a thin strip of plastic. after cleaning, use a folded dollar bill to wipe between them abrasive free. the point gap on the high point of the breaker cam is .013". Reassemble the components (in time) and give it a whirl. Condensers can go bad. If still no joy, it could be that. the condenser is mounted internal to the coil, and more needs to be taken apart. Jim
Pre-disassembly before servicing points: remove the wire attached to the side and see if it runs, if so the switch is bad, or the wire is grounded. it is a grounded kill switch, not power.
First realize that setting it on TDC #1 on compression allows a known position from which to work.
Remove the cap and make sure the rotor is pointed to #1 cap tower terminal attached to #1 plug. Next remove the rotor block and rotor from the body of the mag. This is geared to the breaker cam shaft and is timed with marks and must go back where it was.
The points are now exposed. Dress the points with a piont file, needle file, or 320 grit paper over a thin strip of plastic. after cleaning, use a folded dollar bill to wipe between them abrasive free. the point gap on the high point of the breaker cam is .013". Reassemble the components (in time) and give it a whirl. Condensers can go bad. If still no joy, it could be that. the condenser is mounted internal to the coil, and more needs to be taken apart. Jim
Zachary Hoyt
Well-known Member
Mine died like that in the middle of a puddle in the woods a couple of years ago. I first replaced the points and condenser, then the coil which was apparently what it needed. Janicholson was very kind in walking me through the whole job and those old posts are all in the archives.
Zach
Zach
Similar threads
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.
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 Headquarters
Website Accessibility Policy