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Changed the carb float.
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- 5+ Years
- Posts: 605
- Joined: Sat Oct 22, 2016 1:04 pm
- Zip Code: 72454
- Tractors Owned: 1948 Cub "Trusty"
1948 Cub "Rusty"
1948 Cub "Bob"
1948 Cub "Sallie" (wife's tractor)
1965 IH Cub "Annie"
1943 Farmall H
1953 Farmall Super M (granddad's tractor)
Changed the carb float.
I changed the float in my ih carb today. Took a bit to get it adjusted right but finally.got it to run right. Now she is more cold natured than before. Have to let the engine warm up longer than before but still.pretty easy to start. What would have caused this?
1948 Cub "Trusty"
1948 Cub "Rusty" mower tractor, trimmed ear dash
1948 Cub "Bob"
1948 Cub "Sallie"
1965 IH Cub "Annie" mower tractor,
1943 Farmall H,
1953 Farmall Super M
1948 Cub "Rusty" mower tractor, trimmed ear dash
1948 Cub "Bob"
1948 Cub "Sallie"
1965 IH Cub "Annie" mower tractor,
1943 Farmall H,
1953 Farmall Super M
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- Team Cub Mentor
- Posts: 17488
- 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: Changed the carb float.
Probably the old float/adjustment allowed the carb to run rich.
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- 10+ Years
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- Joined: Tue Jul 22, 2008 12:44 pm
- Zip Code: 48370
- Tractors Owned: 184
- Location: Oxford, MI
Re: Changed the carb float.
The old float allowed a higher fuel level in the bowl. I would guess that the old float might have had a hole in it and had fuel in the float which lowered the float level. This allowed "too much" fuel to be in the bowl.
Perhaps your new float level is adjusted a bit too low? Did you do the measurement without the gasket?
Perhaps your new float level is adjusted a bit too low? Did you do the measurement without the gasket?
184 w/ Creeper & 3-Point
IH 3160a Mower
IH Model 15 Tiller
IH-54 Blade
IH 3160a Mower
IH Model 15 Tiller
IH-54 Blade
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- 5+ Years
- Posts: 605
- Joined: Sat Oct 22, 2016 1:04 pm
- Zip Code: 72454
- Tractors Owned: 1948 Cub "Trusty"
1948 Cub "Rusty"
1948 Cub "Bob"
1948 Cub "Sallie" (wife's tractor)
1965 IH Cub "Annie"
1943 Farmall H
1953 Farmall Super M (granddad's tractor)
Re: Changed the carb float.
I first set to the specified levels. Wouldn't get near enough fuel. Had to keep the choke to make it run. Got it set as high as I can and it runs great. Just a little more cold.natured.
1948 Cub "Trusty"
1948 Cub "Rusty" mower tractor, trimmed ear dash
1948 Cub "Bob"
1948 Cub "Sallie"
1965 IH Cub "Annie" mower tractor,
1943 Farmall H,
1953 Farmall Super M
1948 Cub "Rusty" mower tractor, trimmed ear dash
1948 Cub "Bob"
1948 Cub "Sallie"
1965 IH Cub "Annie" mower tractor,
1943 Farmall H,
1953 Farmall Super M
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- 10+ Years
- Posts: 6151
- Joined: Mon Mar 19, 2012 7:33 pm
- Zip Code: 00000
- Tractors Owned: 1956 Farmall Cub with Fast Hitch, F-11 plow, Disc, Cultivator, Cub-22 mower
- Circle of Safety: Y
- Location: Wa.
Re: Changed the carb float.
Hi,
I don't know if you took the main jet out and cleaned it, if the mixture is too lean, it could be dirty.
The carburetor should work right with the float level, and drop, set to the specs in the Cub service manual.
The main jet is the brass colored 6 sided part on the lower side of the carb. It screws out of the carb. The 1st pic below shows where it is.
Clean it with a small wire, the 2nd pic below shows how, then wash it out.
Tighten everything on the carb gently, the metal is soft, and threads can strip out.
If you set the float as high as it will go, gas might run or drip out of the carb when the Cub is sitting.
I don't know if you took the main jet out and cleaned it, if the mixture is too lean, it could be dirty.
The carburetor should work right with the float level, and drop, set to the specs in the Cub service manual.
The main jet is the brass colored 6 sided part on the lower side of the carb. It screws out of the carb. The 1st pic below shows where it is.
Clean it with a small wire, the 2nd pic below shows how, then wash it out.
Tighten everything on the carb gently, the metal is soft, and threads can strip out.
If you set the float as high as it will go, gas might run or drip out of the carb when the Cub is sitting.
Last edited by Glen on Sat Dec 09, 2017 6:35 pm, edited 1 time in total.
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- 5+ Years
- Posts: 605
- Joined: Sat Oct 22, 2016 1:04 pm
- Zip Code: 72454
- Tractors Owned: 1948 Cub "Trusty"
1948 Cub "Rusty"
1948 Cub "Bob"
1948 Cub "Sallie" (wife's tractor)
1965 IH Cub "Annie"
1943 Farmall H
1953 Farmall Super M (granddad's tractor)
Re: Changed the carb float.
Cleaned everything and for float height I thought the same. First time I ever seen this carb not leak so I left it alone lol. It's not to the book and I try to stay as close as possible but also when something is working I leave it lol.
1948 Cub "Trusty"
1948 Cub "Rusty" mower tractor, trimmed ear dash
1948 Cub "Bob"
1948 Cub "Sallie"
1965 IH Cub "Annie" mower tractor,
1943 Farmall H,
1953 Farmall Super M
1948 Cub "Rusty" mower tractor, trimmed ear dash
1948 Cub "Bob"
1948 Cub "Sallie"
1965 IH Cub "Annie" mower tractor,
1943 Farmall H,
1953 Farmall Super M
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