(800) 853-2651
SHOP NOW

No fire on 8N

B

blinwmiaol.com

Member
I am working on an 8N for a neighbor. Got it and it was lacking compression on three cylinders. Been told it was overhauled less than a hundred hours ago but ten years ago by a local guy so didnt figure the engine worn out. Did a wet compression test and it was 40, 60, 70 and 90. Bought the little required wrenches and adjusted the valves to .016. the compression is now 70,80,80 and 95 psi wet. Problem is now I have no spark. There is power to the + side of the coil and power to the - side of the coil intermitant with the points opening but have no fire on any plug wire. Is this an indication of the coil going bad or something in the distibutor? The cap and rotor are in good shape, look new. thanks for any help
 
First off compression less then 90PSI on an 8N is not good enough to run well if at all. I would do an ATF treatment on it as in fill the cylinders with about a 1/2 cup of ATF and let sit a couple days. As for no spark I am guessing it is a side mount distributor so you need to check/clean the points and make sure they are gaped at 0.025. Then check for spark. If still no spark hot wire it and if you then have spark you know which way to go from there. No spark hot wired says a problem with the distributor and you may have the points shorted out
 

feed-thru_copper_strip.jpg
 
Remove the coil wire from the cap and hold it next to a ground. With the distributor cap off and the points closed open and close them with a screwdriver. Does the coil wire provide good spark each time the points are opened? If so look to the distribution end, if not look to the coil end.
 
You must log in or register to reply here.

Similar threads

R
No spark
2
Replies
39
Views
2K
rockin
R
B
Farmall 656 Gas no spark, has power to coil
Replies
7
Views
422
wore out
wore out
R
8n ford no start
Replies
9
Views
490
Hobo,NC
Hobo,NC
B
Ted 20 not firing up.
Replies
4
Views
308
used red MN
U
A
  • Question
Smokey 8n. Oily substance in intake
Replies
7
Views
413
Tim PloughNman Daley RIP
T
Tractor Parts Tractor Manuals

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

Back
Top