48 C running rough suddenly

Farmall C, Super C Tractors, 200 & 230 1948-1958
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treesitter
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Zip Code: 44039
Tractors Owned: 48 Cub
73 Cub Cadet
48 C
49 M
Location: North Ridgeville, Ohio

48 C running rough suddenly

Postby treesitter » Mon Apr 12, 2021 1:12 pm

Greetings everyone. I'm having a little trouble diagnosing a sudden rough running issue with my C that started out of the blue, and it was just running/idling and not working hard at the time. It will "settle in" briefly for a few seconds or so but goes right back to roughness. I put a video on You Tube (link below) a video that starts with it running fine, then rough, then back to fine. I've done several easy things, trying to avoid harder possible fixes- cleaned screen in fuel bowl, fuel screen in fuel intake elbow on carb, drained carb and blew air through idle screw hole- but have not removed carb for a real cleaning/overall (which I have never done since getting the tractor). It is a Zenith carb. On the electric side I checked plugs and replaced, although all looked like they were firing but a couple looked like replacement was due; new rotor (since I had one); checked point gap, which was fine (I replaced plug wires/rotor/points/condenser/distributer cap a couple years ago). Played a little with the bumper spring screw on the governor some (it needed some adjustment when I first got the tractor) but no change/and the nut was tight/no movement to indicate anything different. So yes, I've thrown a hodgepodge of stuff at the wall hoping something easy would stick. Every time I listen to it I jump back and forth on it seems fuel related, then maybe firing issue. I am not a huge mechanic so if I have a compression or timing issue that will be more of an undertaking for sure for me. Any opinions welcomed.

NOTE THIS IS THE WORKING You Tube link (for those of you coming back for a second look:)

https://www.youtube.com/watch?v=1jSn3jTkN-0



Thanks, Andy
Last edited by treesitter on Mon Apr 12, 2021 4:12 pm, edited 1 time in total.
All she did when she first saw it was stand there looking at it, shaking her head,
while my buddy and I stood there drinking beer, grinning over my fine purchase.

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Dale Finch
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Re: 48 C running rough suddenly

Postby Dale Finch » Mon Apr 12, 2021 1:56 pm

It may just be me, but when I clicked on your link, I get "This video is private".
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Bob McCarty
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Re: 48 C running rough suddenly

Postby Bob McCarty » Mon Apr 12, 2021 2:10 pm

Dale Finch wrote:It may just be me, but when I clicked on your link, I get "This video is private".

I get the same thing.
"We don't need to think more,
we need to think differently."
-Albert Einstein

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Re: 48 C running rough suddenly

Postby SamsFarm » Mon Apr 12, 2021 2:27 pm

Bob McCarty wrote:
Dale Finch wrote:It may just be me, but when I clicked on your link, I get "This video is private".

I get the same thing.


Mee too! Lol! Private video!

Is your distributer cap have any corrosion on the contacts on the underside? Aluminum contacts on the distributer cap have been known to corrode, causing problems!
1968 Cub fast hitch

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treesitter
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Posts: 132
Joined: Mon Apr 21, 2003 1:40 pm
Zip Code: 44039
Tractors Owned: 48 Cub
73 Cub Cadet
48 C
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Location: North Ridgeville, Ohio

Re: 48 C running rough suddenly

Postby treesitter » Mon Apr 12, 2021 2:41 pm

Sorry all. I fixed the video to public. Honestly it was the first time I have ever uploaded a video on You Tube. I knew I should have waited until my kids got home!
All she did when she first saw it was stand there looking at it, shaking her head,

while my buddy and I stood there drinking beer, grinning over my fine purchase.

User avatar
Dale Finch
10+ Years
10+ Years
Posts: 5905
Joined: Tue Apr 27, 2010 11:34 am
Zip Code: 27517
Tractors Owned: '51 Cub "Bernie" with Fast Hitch
'55 Cub "Bruno" with Woods 59 mower
'55 Cub "Bertha" with Woods 42 mower
'55 Cub "Ben" with Woods 42 mower
'56 Cub "Boris" with Mott Flail mower
Circle of Safety: Y
Location: NC, Chapel Hill

Re: 48 C running rough suddenly

Postby Dale Finch » Mon Apr 12, 2021 2:51 pm

Just wait til the kids get home...still the same! :lol:
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treesitter
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Joined: Mon Apr 21, 2003 1:40 pm
Zip Code: 44039
Tractors Owned: 48 Cub
73 Cub Cadet
48 C
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Location: North Ridgeville, Ohio

Re: 48 C running rough suddenly

Postby treesitter » Mon Apr 12, 2021 2:57 pm

I know that I think I got it this time! Try this link. Sorry.

https://youtu.be/1jSn3jTkN-0
All she did when she first saw it was stand there looking at it, shaking her head,

while my buddy and I stood there drinking beer, grinning over my fine purchase.

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Re: 48 C running rough suddenly

Postby Jim Becker » Mon Apr 12, 2021 3:11 pm

Reminds me a bit of a dropped valve seat, which I have never seen in a C-113 or related engine. A sticking valve might give a similar behavior (OK for a while, then stick for a while). I'd be tempted to take the rocker cover off and check for a troublesome valve.

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treesitter
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Posts: 132
Joined: Mon Apr 21, 2003 1:40 pm
Zip Code: 44039
Tractors Owned: 48 Cub
73 Cub Cadet
48 C
49 M
Location: North Ridgeville, Ohio

Re: 48 C running rough suddenly

Postby treesitter » Mon Apr 12, 2021 3:50 pm

Thanks Jim and I will check that. I will say the longer it runs, the less it is willing to hit a smooth spot, nearly to the point it is all rough and no smoothness. After it starts, goes rough, sometimes a quick fast throttle will "slap it back" and run smooth for a moment. But like I said eventually it seems as though it can't find the spot, so to speak. Not that I let it run too long like that of course.
All she did when she first saw it was stand there looking at it, shaking her head,

while my buddy and I stood there drinking beer, grinning over my fine purchase.

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Don McCombs
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Tractors Owned: "1950 Something" Farmall Cub
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1978 International Cub
1948 Farmall Super A
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Location: MD, Deep Creek Lake

Re: 48 C running rough suddenly

Postby Don McCombs » Mon Apr 12, 2021 4:11 pm

Check the fuel tank outlet for a partial obstruction.
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MD, Deep Creek Lake

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User avatar
treesitter
10+ Years
10+ Years
Posts: 132
Joined: Mon Apr 21, 2003 1:40 pm
Zip Code: 44039
Tractors Owned: 48 Cub
73 Cub Cadet
48 C
49 M
Location: North Ridgeville, Ohio

Re: 48 C running rough suddenly

Postby treesitter » Mon Apr 12, 2021 4:30 pm

Thanks Don. That would be the kind of fix I'm hoping for! But I will say when I put the bowl back on from cleaning the screen etc it filled up pretty fast. But I will still certainly check that.

I noticed in your tractor list you also have a Super A. I just got offered one for free, with free delivery. Sometime in May I'll be going over help get it out of the corner of the barn it's in. Other than it's not running, it's in good shape; kind of an oxymoron I know. He mentioned it was converted to 12V before he got it and he thinks he did something wrong 'with the whole positive ground thing', or something like that :), and hasn't ran for couple years. I just need to get it here. I'm sure I'll have a post or two when I start dealing with it.

I would post a pic but don't know how....

Thanks for the tip
All she did when she first saw it was stand there looking at it, shaking her head,

while my buddy and I stood there drinking beer, grinning over my fine purchase.

SamsFarm
501 Club
501 Club
Posts: 1265
Joined: Wed Jan 20, 2021 8:21 pm
Zip Code: 44410
Tractors Owned: 1968 Cub Fast Hitch
LF-1 Platform Carrier
144 Cultivators
L-F194 Plow(s)
F38 Disk
L-F3 Spring Tooth Harrow
Fast Hitch CS Bell 60 Grain Mill
Home Made Fast Hitch Potato Plow
54A Blade

Couple 1948 Cubs
172 Runner Planter
53 Fertilizer
Cub-3 Field Cultivator
Cub-189 Two Way Plow
Cub-22 Sickle Bar Mower
Mechanical Transplanter with side mount barrel (needs a fast hitch adapter) :)

Misc Belly Mowers

Wish List
International 100 Fast Hitch Blade
Mott Fast Hitch Flail Mower

Wish Wish Wish List
Fast Hitch Rotary Hoe
4E hammer mill
Location: Ne Ohio

Re: 48 C running rough suddenly

Postby SamsFarm » Mon Apr 12, 2021 5:38 pm

treesitter wrote:I would post a pic but don't know how....


When your in the "full editor and preview" window where you type your message, right below the "save draft" button there is a "attachments" tab.

Click on the "attachments" tab, then "add files" button, then follow through with how it works on your phone or computer!

Hope that helps!!!

*Can never beat a free tractor!* *Running or not!*
1968 Cub fast hitch

SamsFarm
501 Club
501 Club
Posts: 1265
Joined: Wed Jan 20, 2021 8:21 pm
Zip Code: 44410
Tractors Owned: 1968 Cub Fast Hitch
LF-1 Platform Carrier
144 Cultivators
L-F194 Plow(s)
F38 Disk
L-F3 Spring Tooth Harrow
Fast Hitch CS Bell 60 Grain Mill
Home Made Fast Hitch Potato Plow
54A Blade

Couple 1948 Cubs
172 Runner Planter
53 Fertilizer
Cub-3 Field Cultivator
Cub-189 Two Way Plow
Cub-22 Sickle Bar Mower
Mechanical Transplanter with side mount barrel (needs a fast hitch adapter) :)

Misc Belly Mowers

Wish List
International 100 Fast Hitch Blade
Mott Fast Hitch Flail Mower

Wish Wish Wish List
Fast Hitch Rotary Hoe
4E hammer mill
Location: Ne Ohio

Re: 48 C running rough suddenly

Postby SamsFarm » Mon Apr 12, 2021 5:41 pm

Even though you changed your ignition components, the possibility exists that one of them might be defective!

I hope you get it! :)
1968 Cub fast hitch

User avatar
treesitter
10+ Years
10+ Years
Posts: 132
Joined: Mon Apr 21, 2003 1:40 pm
Zip Code: 44039
Tractors Owned: 48 Cub
73 Cub Cadet
48 C
49 M
Location: North Ridgeville, Ohio

Re: 48 C running rough suddenly

Postby treesitter » Mon Apr 12, 2021 9:43 pm

I posted another video that's a little longer. I took the valve cover off and looked that over some, gave a few easy turns with the hand crank. All looked ok, but I'm no expert, and don't have the best view while turning crank. No blockage in fuel outlet from tank and cleaned up contacts some on dist cap.

https://youtube.com/shorts/oL5DWfikYLc?feature=share
All she did when she first saw it was stand there looking at it, shaking her head,

while my buddy and I stood there drinking beer, grinning over my fine purchase.

User avatar
Don McCombs
Team Cub Mentor
Team Cub Mentor
Posts: 16137
Joined: Mon Feb 03, 2003 6:45 am
Zip Code: 21550
Tractors Owned: "1950 Something" Farmall Cub
1957 Farmall Cub w/FH
1977 International Cub w/FH
1978 International Cub
1948 Farmall Super A
Circle of Safety: Y
Location: MD, Deep Creek Lake

Re: 48 C running rough suddenly

Postby Don McCombs » Tue Apr 13, 2021 6:48 am

Good luck on the SA.
Don McCombs
MD, Deep Creek Lake

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Proud Member of Maryland Chapter 39
Circle of Safety


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