cub running bad

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Jack
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cub running bad

Postby Jack » Sat Oct 26, 2019 5:05 pm

hello , I tuned my cub up yesterday and today, points condencer, plugs , wires, rotor, cap the whole nine yards,because it seemed like it was going to run out of gas, but I had 5 gals in the tank.
I rebuilt the carb today also, the cub seemed to be surging that's why I tuned it up, I started it up and it is still surging if that's the right word to use.
I noticed the governor rod moving back and forth and that was the surging, also when I put the throttle lever in the slow postion it just stalls right out. I tried making adjustment to the governor rod, but had no luck.
do you think my governor could be going bad
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Slim140
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Re: cub running bad

Postby Slim140 » Sat Oct 26, 2019 5:07 pm

Fuel restriction somewhere. Either in the tank, line, or carb.
Every home is a school, what are you teaching?

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Jack
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Tractors Owned: 1955 Farmall Cub
1955 International 300 Utility
2018 JD loader/ backhoe
Circle of Safety: Y
Location: Tionesta, PA.

Re: cub running bad

Postby Jack » Sat Oct 26, 2019 5:28 pm

I put a new screen and gasket on the fuel strainer. Cleaned it out good also .
Runs like it did before I did the work on it
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Slim140
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Circle of Safety: Y

Re: cub running bad

Postby Slim140 » Sat Oct 26, 2019 5:48 pm

Float may need adjusting, needle may be sticking. It’s surging and sounds like it’s going to cut off from lack of fuel. Probably something simple, just got to find it.

On a side note, have you cleaned/changed the oil bath on the air cleaner lately?
Every home is a school, what are you teaching?

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Jack
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Joined: Sun Aug 14, 2005 11:14 am
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Tractors Owned: 1955 Farmall Cub
1955 International 300 Utility
2018 JD loader/ backhoe
Circle of Safety: Y
Location: Tionesta, PA.

Re: cub running bad

Postby Jack » Sat Oct 26, 2019 6:01 pm

Thank you, I will take the carb back off tomorrow and check it out again .
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Don McCombs
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Re: cub running bad

Postby Don McCombs » Sat Oct 26, 2019 6:05 pm

Did you readjust the governor to carb linkage after you removed the carburetor?
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Glen
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Re: cub running bad

Postby Glen » Sat Oct 26, 2019 6:10 pm

Hi,
You could try cleaning the carburetor main jet. The engine won't run right if it has dirt in it.
It is the 6 sided brass colored piece on the lower side of the IH carb.
It screws out of the carb. Clean it with a small wire, and then wash it out with solvent.
If the gasket on it is old, it may leak when reused, a little sealer on it might stop the leaking, or TM Tractor has a new gasket.
Tighten everything on the carb gently, the carb is soft metal, and threads can strip. :)

Below are pics.
Attachments
Cub carb 3.jpg
Cub jet.jpg

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Jack
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Joined: Sun Aug 14, 2005 11:14 am
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Tractors Owned: 1955 Farmall Cub
1955 International 300 Utility
2018 JD loader/ backhoe
Circle of Safety: Y
Location: Tionesta, PA.

Re: cub running bad

Postby Jack » Sat Oct 26, 2019 6:19 pm

Don McCombs wrote:Did you readjust the governor to carb linkage after you removed the carburetor?

Yes I adjusted the rod after I rebuilt the carb
Circle of Safety Pine Meadows Farm :tractor:

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Jack
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Tractors Owned: 1955 Farmall Cub
1955 International 300 Utility
2018 JD loader/ backhoe
Circle of Safety: Y
Location: Tionesta, PA.

Re: cub running bad

Postby Jack » Sat Oct 26, 2019 6:22 pm

Glen wrote:Hi,
You could try cleaning the carburetor main jet. The engine won't run right if it has dirt in it.
It is the 6 sided brass colored piece on the lower side of the IH carb.
It screws out of the carb. Clean it with a small wire, and then wash it out with solvent.
If the gasket on it is old, it may leak when reused, a little sealer on it might stop the leaking, or TM Tractor has a new gasket.
Tighten everything on the carb gently, the carb is soft metal, and threads can strip. :)

Below are pics.

I cleaned the carb with carb cleaner, I did have that main jet out and sprayed it good with cleaner and air
Circle of Safety Pine Meadows Farm :tractor:

tst
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Re: cub running bad

Postby tst » Sat Oct 26, 2019 7:13 pm

if you have good gas flow, make sure the bumper spring is not broken on the governor, and check the adjustment on it also, you said you tuned it up did you check the advance weights in the distributor to make sure they are not froze up and working?

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Jack
10+ Years
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Posts: 821
Joined: Sun Aug 14, 2005 11:14 am
Zip Code: 16353
Tractors Owned: 1955 Farmall Cub
1955 International 300 Utility
2018 JD loader/ backhoe
Circle of Safety: Y
Location: Tionesta, PA.

Re: cub running bad

Postby Jack » Sat Oct 26, 2019 7:16 pm

No I did not check the advance weights, or the spring.
I will check those also tomorrowthank you
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Jeff Silvey
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Re: cub running bad

Postby Jeff Silvey » Sun Oct 27, 2019 7:41 am

It could be a worn leaver at the governor where the spring attaches to. That hole some times gets wallered out.
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Eugene
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Re: cub running bad

Postby Eugene » Sun Oct 27, 2019 9:56 am

Did you time the engine/ignition system with a timing light?

Agree with the others, surging is typically fuel related.

Was the surging something new or had the engine been surging for some time prior to the tune up.
I have an excuse. CRS.

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Don McCombs
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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: cub running bad

Postby Don McCombs » Sun Oct 27, 2019 10:06 am

Jack wrote:...the cub seemed to be surging that's why I tuned it up...
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MD, Deep Creek Lake

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User avatar
Jack
10+ Years
10+ Years
Posts: 821
Joined: Sun Aug 14, 2005 11:14 am
Zip Code: 16353
Tractors Owned: 1955 Farmall Cub
1955 International 300 Utility
2018 JD loader/ backhoe
Circle of Safety: Y
Location: Tionesta, PA.

Re: cub running bad

Postby Jack » Sun Oct 27, 2019 10:55 am

Eugene wrote:Did you time the engine/ignition system with a timing light?

Agree with the others, surging is typically fuel related.

Was the surging something new or had the engine been surging for some time prior to the tune up.

I did not time the ignition system.
It just started the surging, prior to that it seemed like it was starting to run out of gas,
I didn't get back to the garage yet. Hoping to get out there later this afternoon
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