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Super A magneto problem
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- havoc1482
- 10+ Years
- Posts: 987
- Joined: Fri Sep 20, 2013 11:17 am
- Zip Code: 01085
- eBay ID: havoc1482
- Tractors Owned: _______ 1948 Farmall Super A
- Circle of Safety: Y
- Twitter ID: @havoc1482
- Location: Westfield, MA
- Contact:
Super A magneto problem
So. Tractor was running great until I left it out in the rain for about 3 days. After that she wouldn't fire. I figured something that got wet that wasn't supposed to. I narrowed it down to a weak spark, so something was clearly wrong in that area. I popped the distributor cap off to check it, didn't notice much, cleaned it anyways. I then took the rotor cap and nudged the center of the arm a wee bit out (so it would be closer to the center point on the cap) and It fired right up. It was running just fine for about 1 minute, then it shut off, I had the gas off, oops haha. So I turned the gas on and she fired right back up again. After that the tractor ran for about an hour until I finally shut it down. I went to start it again and nothing. She just turned and turned and turned. I pulled the cap off again and found little metal shreds all over the inside. They were around the entire inside, like the rotor decided to machine the center of the cap. Could this be solved by just getting myself a new cap/rotor? I also noticed the arm on the rotor had a small crack on that little rivet thing that holds it on, could that cause a problem?
I think its having poor contact with the center point on the cap.
I think I have the H4 magneto, but I'm not sure.
I think its having poor contact with the center point on the cap.
I think I have the H4 magneto, but I'm not sure.
Mike
I bleed Black & Gold
IH Collectors Club New England (Chapter 18)
Western Mass. (The 413)
I bleed Black & Gold
IH Collectors Club New England (Chapter 18)
Western Mass. (The 413)
-
- 10+ Years
- Posts: 12
- Joined: Sun Mar 30, 2014 8:11 pm
- Zip Code: 37779
Re: Super A magneto problem
Sounds like maybe cap and rotor
- John *.?-!.* cub owner
- Cub Pro
- Posts: 23701
- Joined: Sun Feb 02, 2003 2:09 pm
- Zip Code: 63664
- Tractors Owned: 47, 48, 49 cub plus Wagner loader & other attachments. 41 Farmall H.
- Location: Mo, Potosi
Re: Super A magneto problem
The center of the cap should have a little carbon button that sticks out for the rotor to contact in the center. I suspect yours broke off or wore off. You need to also check the rotor to see if it has a smooth spot where it contacts that carbon button or if it has worn through and is cutting it up. It does not want much pressure where it contacts that button.
If you are not part of the solution,
you are part of the problem!!!
you are part of the problem!!!
- havoc1482
- 10+ Years
- Posts: 987
- Joined: Fri Sep 20, 2013 11:17 am
- Zip Code: 01085
- eBay ID: havoc1482
- Tractors Owned: _______ 1948 Farmall Super A
- Circle of Safety: Y
- Twitter ID: @havoc1482
- Location: Westfield, MA
- Contact:
Re: Super A magneto problem
John *.?-!.* cub owner wrote:The center of the cap should have a little carbon button that sticks out for the rotor to contact in the center. I suspect yours broke off or wore off. You need to also check the rotor to see if it has a smooth spot where it contacts that carbon button or if it has worn through and is cutting it up. It does not want much pressure where it contacts that button.
Thats what I figured. The carbon button looks fairly okay, but the spring seems to have lost its "springyness". The carbon button doesn't push out as far as it can go. I'm probably just gonna replace both parts. I assume I have the H4, but how can I know for sure? I just don't wanna pull the trigger on parts that won't fit right. I already did that once lol.
Mike
I bleed Black & Gold
IH Collectors Club New England (Chapter 18)
Western Mass. (The 413)
I bleed Black & Gold
IH Collectors Club New England (Chapter 18)
Western Mass. (The 413)
- Rick Spivey
- Cub Pro
- Posts: 2778
- Joined: Sun Jul 01, 2007 10:07 pm
- Zip Code: 29518
- Circle of Safety: Y
- Location: SC, Cades 29518
Re: Super A magneto problem
It will have "H4" stamped into the serial number. Post a picture and we will tell you for sure.
Rick Spivey
'52 Cub ("Great Personality") 148xxx
'48 Cub with FH ("Gunny Cub") 38xxx
'57 Lambretta (a slow work in progress)
'74 Triumph TR6 (Mama's toy)
'52 Cub ("Great Personality") 148xxx
'48 Cub with FH ("Gunny Cub") 38xxx
'57 Lambretta (a slow work in progress)
'74 Triumph TR6 (Mama's toy)
- havoc1482
- 10+ Years
- Posts: 987
- Joined: Fri Sep 20, 2013 11:17 am
- Zip Code: 01085
- eBay ID: havoc1482
- Tractors Owned: _______ 1948 Farmall Super A
- Circle of Safety: Y
- Twitter ID: @havoc1482
- Location: Westfield, MA
- Contact:
Re: Super A magneto problem
First 3 photos are my tractor, the last one is a google image of what it looks like.
Mike
I bleed Black & Gold
IH Collectors Club New England (Chapter 18)
Western Mass. (The 413)
I bleed Black & Gold
IH Collectors Club New England (Chapter 18)
Western Mass. (The 413)
- Rick Spivey
- Cub Pro
- Posts: 2778
- Joined: Sun Jul 01, 2007 10:07 pm
- Zip Code: 29518
- Circle of Safety: Y
- Location: SC, Cades 29518
Re: Super A magneto problem
Yes, you have an H4 magneto.
Rick Spivey
'52 Cub ("Great Personality") 148xxx
'48 Cub with FH ("Gunny Cub") 38xxx
'57 Lambretta (a slow work in progress)
'74 Triumph TR6 (Mama's toy)
'52 Cub ("Great Personality") 148xxx
'48 Cub with FH ("Gunny Cub") 38xxx
'57 Lambretta (a slow work in progress)
'74 Triumph TR6 (Mama's toy)
- havoc1482
- 10+ Years
- Posts: 987
- Joined: Fri Sep 20, 2013 11:17 am
- Zip Code: 01085
- eBay ID: havoc1482
- Tractors Owned: _______ 1948 Farmall Super A
- Circle of Safety: Y
- Twitter ID: @havoc1482
- Location: Westfield, MA
- Contact:
Re: Super A magneto problem
Rick Spivey wrote:Yes, you have an H4 magneto.
Figured, thanks! New parts on the way. Hopefully it will remedy the issue.
Mike
I bleed Black & Gold
IH Collectors Club New England (Chapter 18)
Western Mass. (The 413)
I bleed Black & Gold
IH Collectors Club New England (Chapter 18)
Western Mass. (The 413)
- CPIII
- 10+ Years
- Posts: 669
- Joined: Wed Sep 30, 2009 9:43 am
- Zip Code: 77355
- eBay ID: czechiii
- Tractors Owned: 48 Cub SN 54XXX (Captain Crunch)
47 Farmall A (Patches) - Circle of Safety: Y
- Location: Magnolia, Texas
Re: Super A magneto problem
I had a similar problem on my cub. and the problem turned out to be a cracked insulator for the kill switch screw. The insulator had a hairline crack and it would short just enough when it rained to allow an inconsistent\weak spark. I don't have a drawing for the H4 but the part shown below was for the J4. But there has to be a similar insular for the H4.
I found the same part for the H4 is is 51A or 51 in the diagram below:
I found the same part for the H4 is is 51A or 51 in the diagram below:
Charles Patek III
Some days - Chicken.......Some days - Feathers
Words to live by....
Some days - Chicken.......Some days - Feathers
Words to live by....
- havoc1482
- 10+ Years
- Posts: 987
- Joined: Fri Sep 20, 2013 11:17 am
- Zip Code: 01085
- eBay ID: havoc1482
- Tractors Owned: _______ 1948 Farmall Super A
- Circle of Safety: Y
- Twitter ID: @havoc1482
- Location: Westfield, MA
- Contact:
Re: Super A magneto problem
Awesome thanks. The coil cover gasket was ripped and shredded so hopefully the new one I got will stop the water next time.
Mike
I bleed Black & Gold
IH Collectors Club New England (Chapter 18)
Western Mass. (The 413)
I bleed Black & Gold
IH Collectors Club New England (Chapter 18)
Western Mass. (The 413)
- havoc1482
- 10+ Years
- Posts: 987
- Joined: Fri Sep 20, 2013 11:17 am
- Zip Code: 01085
- eBay ID: havoc1482
- Tractors Owned: _______ 1948 Farmall Super A
- Circle of Safety: Y
- Twitter ID: @havoc1482
- Location: Westfield, MA
- Contact:
Re: Super A magneto problem
Yeah, so something isn't quite right, I think I have a grounding/short issue here, I have ZERO spark. I think I'm gonna have to pull the magneto off, and take a more thorough look. I have a question, if I remove the magneto, will I have to re-time it after? And If I do, should I follow this?: http://www.yesterdaystractors.com/articles/artint7.htm
Mike
I bleed Black & Gold
IH Collectors Club New England (Chapter 18)
Western Mass. (The 413)
I bleed Black & Gold
IH Collectors Club New England (Chapter 18)
Western Mass. (The 413)
- havoc1482
- 10+ Years
- Posts: 987
- Joined: Fri Sep 20, 2013 11:17 am
- Zip Code: 01085
- eBay ID: havoc1482
- Tractors Owned: _______ 1948 Farmall Super A
- Circle of Safety: Y
- Twitter ID: @havoc1482
- Location: Westfield, MA
- Contact:
Re: Super A magneto problem
Found the problem. Bad gaskets + rain for 3 days =
Yep, water in the points housing.
Yep, water in the points housing.
Mike
I bleed Black & Gold
IH Collectors Club New England (Chapter 18)
Western Mass. (The 413)
I bleed Black & Gold
IH Collectors Club New England (Chapter 18)
Western Mass. (The 413)
- John *.?-!.* cub owner
- Cub Pro
- Posts: 23701
- Joined: Sun Feb 02, 2003 2:09 pm
- Zip Code: 63664
- Tractors Owned: 47, 48, 49 cub plus Wagner loader & other attachments. 41 Farmall H.
- Location: Mo, Potosi
Re: Super A magneto problem
Usually moisture in the points housing will not stop a spark, unless it was standing in puddles in there. However, if the moisture got inside the coil housing, that is another story. My loader cub sets under a lean too on the side of my shed, and I keep a layer of bubble wrap plastic over it, held in place with reusable cable ties. Makes it much easier to start in high humidity, or just after a rain or even early in the morning before the dew has dried good.
If you are not part of the solution,
you are part of the problem!!!
you are part of the problem!!!
- havoc1482
- 10+ Years
- Posts: 987
- Joined: Fri Sep 20, 2013 11:17 am
- Zip Code: 01085
- eBay ID: havoc1482
- Tractors Owned: _______ 1948 Farmall Super A
- Circle of Safety: Y
- Twitter ID: @havoc1482
- Location: Westfield, MA
- Contact:
Re: Super A magneto problem
Well I can tell you John, it was more than a little moisture lol. The cavity was filled up halfway. There probably is also water around the coil too. Any tips for drying it out short of tearing the entire thing apart?
Mike
I bleed Black & Gold
IH Collectors Club New England (Chapter 18)
Western Mass. (The 413)
I bleed Black & Gold
IH Collectors Club New England (Chapter 18)
Western Mass. (The 413)
- John *.?-!.* cub owner
- Cub Pro
- Posts: 23701
- Joined: Sun Feb 02, 2003 2:09 pm
- Zip Code: 63664
- Tractors Owned: 47, 48, 49 cub plus Wagner loader & other attachments. 41 Farmall H.
- Location: Mo, Potosi
Re: Super A magneto problem
Lay it outside on a nice warm sunny day, or if you have a dehumidifier turn it down to 35% and set it over the vent.
If you are not part of the solution,
you are part of the problem!!!
you are part of the problem!!!
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