Welcome! Please use the navigational links to explore our website.
PartsASAP LogoCompany Logo (800) 853-2651

Shop Now

   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver

Attention Forum Users: On the 28th of December 2023 at 9:00am Central Time, we will be taking the forums down for maintenance while we prepare the new forums for your use. Please click here for more information.

Discussion Forum
:

39hand start B no spark r-cyl

Welcome Guest, Log in or Register
Author 
Dan in PA

11-30-2002 14:52:38




Report to Moderator

Just rebuilt the mag on the 39-b a Wico-C ,new points ,condencer,rotor,cap,solid core wires,and plugs. The impulse dogs are engaging ok and I am getting a good snap so that seems ok.She is throwing a healthy blue spark on the left side but nothing on the right.What could be wrong. Thanks in advance




[Log in to Reply]   [No Email]
Earl

12-01-2002 10:42:00




Report to Moderator
 Re: 39hand start B no spark r-cyl in reply to Dan in PA, 11-30-2002 14:52:38  
You might have a bad cap or rotor could even have a bad wire on the bad side. New parts can be defective. You might have worn point opening lobes. See if the points are opening the same for both sides. Make sure the rotor is aligning with the cap for both sides 1 fires first then 2 fires 180 dg later. You could have a slipping impulse that won't work 2 times in a row. You did try new plugs. Post back or email for more help. Earl

[Log in to Reply]  [No Email]
John T

12-01-2002 06:08:28




Report to Moderator
 Re: 39hand start B no spark r-cyl in reply to Dan in PA, 11-30-2002 14:52:38  
Dan, since shes throwign a healthy spark on one side, that tells us the coil is okay and the remaining problem areas could be the cap, rotor, plug or wire on that bad side. First, try substituting plugs and wires to that bad side and see if you can get any fire then. If not, then the problem may be in the cap or even a crack or carbon path somewhere arcing off the spark to that particular plug terminal. Are the points opening to approximately the same gap on both cam high lobes??? Check the gap at each. When the mag is ready to snap over and fire the top terminal (left pistion at TDC on compression strke), the rotors leadign tip is before the top terminal and then passes over it when she snaps, then 180 later, its the rotors second lagging tip that passes by the bottom terminal. Inspect the rotor for that timing and its two tips to see if theres any difference and the cap where that line up occurs. I assume the dogs catch and wind the spring and she snaps over equally on BOTH firings?? Try this and clooneys suggestions and let us know. Good Luck, Ol John T Nordhoff

[Log in to Reply]  [No Email]
Clooney

11-30-2002 15:30:08




Report to Moderator
 Re: 39hand start B no spark r-cyl in reply to Dan in PA, 11-30-2002 14:52:38  
Dan, probably the place to start is to pull the outer mag cap & make sure the rotor is lining up with the proper cap tower when the L/H impulse on the flywheel is lining up with the case mark. Then turn the flywheel 180� & make sure the rotor is lining for #2 also. If that is ok, make sure the inner cap brass contact is touching the coil secondary button [you really can't see in there so either pull the inner cap & use lipstick to check for button contact or just bend it so you are sure it is touching].
~Make sure the points are opening for both cylinders [maybe you have a worn point cam lobe]
set the points to .016"-.017" & see if that helps the problem.
~You should probably check for spark on both cap towers right at the cap as you could have a bad wire or bad connection.
~If the above doesn't help the problem, start substituting the old parts until you find the problem. Let us know what you find, I'm betting it is the inner contact clip not touching the coil button [especially if you aren't getting a continuous occurring spark on the L/H side...

[Log in to Reply]  [No Email]
Dan in PA

11-30-2002 15:54:10




Report to Moderator
 Re: Re: 39hand start B no spark r-cyl in reply to Clooney, 11-30-2002 15:30:08  
Thanks Clooney, I will try what you have said and see what happens and I will get back with you and let you know.



[Log in to Reply]  [No Email]
[Options]  [Printer Friendly]  [Posting Help]  [Return to Forum]   [Log in to Reply]

Hop to:


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. [ About Us ]

Home  |  Forums


Copyright © 1997-2023 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