Cub dies under load

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John D
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Cub dies under load

Postby John D » Wed Jul 12, 2017 1:40 am

Hello,

I am currently trying to solve a problem with my farmall cub and would appreciate all the help i can get.
The problem is that my cub will run fine will parked with no load on the motor but when i try to drive it lacks power and will stall on a slight hill even in first. I have recently clean the fuel tank and sediment bowl, installed a new carburetor and rebuilt the governor and re weird the hole tractor.

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Jonathan
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Tractors Owned: These are my farmalls all my grandaddy's tractors

1952 cub with fast hitch name (grandaddy Eddie s.)

1957 cub with fast hitch name (grandaddy Leon b.)

1970 140 with fast hitch name (grandaddy Bill j. )

I'm looking fast hitch stuff for all 3 of then I have nothing

Re: Cub dies under load

Postby Jonathan » Wed Jul 12, 2017 8:49 am

Motor needs to be rebuild :hattip: :hattip:
Jonathan s. :D :hattip:

Eugene
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Re: Cub dies under load

Postby Eugene » Wed Jul 12, 2017 8:55 am

Complete engine tune up, in including compression tests. First, compression tests then check the ignition timing.

What is the history of this tractor/engine? How long have you owned the tractor?

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Jim Becker
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Re: Cub dies under load

Postby Jim Becker » Wed Jul 12, 2017 9:00 am

Recheck the governor to carb linkage for free movement and proper adjustment.

Crimson Tim
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Re: Cub dies under load

Postby Crimson Tim » Wed Jul 12, 2017 9:06 am

My first thoughts would be a fuel supply issue or slop in the governor-to-carb linkage.

When it starts to stumble, can you get it to run a bit better by closing the choke partially/fully? That would indicate a fuel restriction.
You say you recently cleaned the tank and strainer. Does that include the inlet valve to the strainer? Did you clean the screen at the inlet to the carb? Did you clean the jet? It takes a very small amount of crud at any of these locations to restrict fuel supply.

If there is too much slop in the governor-to-carb linkage, the governor may be requesting a wider throttle, but the carb may not be getting the message to respond.

Did tractor work prior to this work? A more thorough history would help.

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Shane Nelson
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1947 Circle Cub #1447 (Arnold)
1970 International 140 (Norman)
1949 John Deere A
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1993 Ford 4630 W/Loader
1965 John Deere 110
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Re: Cub dies under load

Postby Shane Nelson » Wed Jul 12, 2017 10:32 am

Jonathan wrote:Motor needs to be rebuild :hattip: :hattip:

Hold on a minute on that one. How about a compression check first and also try all the other suggestions people have said?
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staninlowerAL
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Re: Cub dies under load

Postby staninlowerAL » Wed Jul 12, 2017 11:26 am

Check valve adjustment as a part of the tuneup.

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Shane Nelson
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1947 Circle Cub #1447 (Arnold)
1970 International 140 (Norman)
1949 John Deere A
1972 Schramm Pneumatractor
1993 Ford 4630 W/Loader
1965 John Deere 110
1961 Cub Cadet Original
Circle of Safety: Y
Location: Oak Ridge, N.C.

Re: Cub dies under load

Postby Shane Nelson » Wed Jul 12, 2017 11:39 am

Put a timing light on it as well. Walt ran good but lacked power. I tuned it up etc. & still lacked power. Put the timing light on it and fine tuned the distributor and you would have thought you put a new engine in it from a 140. It wasn't off much but when you start out with not much then not much taken away from that leaves drippings.
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Rick Spivey
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Re: Cub dies under load

Postby Rick Spivey » Wed Jul 12, 2017 6:24 pm

Is this a battery ignition distributor, or a magneto. If magneto, then weak spark will act like that. I had one that did it.
Rick Spivey
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