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How to adjust carb float on 10-20?

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Dan Oehmke

10-09-2007 18:43:23




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How do I adjust the carb float on McCormick Deering 10-20? I checked the operator's manual and the overhauling 10-20 manual --- but nothing about setting floats. Does the bolt the float pivots on part of the adjustment? Or do I bend the metal bracket on the float?

Thanks,

Dan




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Bob Kerr

10-09-2007 20:15:11




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 Re: How to adjust carb float on 10-20? in reply to Dan Oehmke, 10-09-2007 18:43:23  
Hi Dan, If I remember right, you bend the float arm, but I would unscrew the cork off it when bending it. It would be easy to damage the cork if you bend the arm with the float attached. Keep a good seal at that point as the cork will soak full of gas and sink over time. If you got a new float from Rice, it has a good sealer on it. If you float is an original it will have shellac on it and will dissolve the sealer and sink if there is any alcohol in the gas. As far as a meausurement, I just did mine by trial and error and it took several adjustments before I got it right, but when I got it, it ran like a top and no more flooding out. My mind is telling me it was about a 1/4 inch below what the paper said to set it at.

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Dan Oehmke

10-10-2007 03:40:52




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 Re: How to adjust carb float on 10-20? in reply to Bob Kerr, 10-09-2007 20:15:11  
Thanks Bob.



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moseed

10-10-2007 06:28:33




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 Re: How to adjust carb float on 10-20? in reply to Dan Oehmke, 10-10-2007 03:40:52  

Dan Oehmke said: (quoted from post at 03:40:52 10/10/07) Thanks Bob.


Dan,

If you purchase a rebuild kit with a float in it, or like I did, purchase a float by itself (Gordon Rice) it will come with directions on how to bend the float arm and what level to adjust it to. The float is fragil and can be damsged easily.
If I am not mistaking there were some small engine gurues that found a certain specific small engine carburetor float (brass) did the job with little modification. Wish I knew which float it was as the cork floats seem to fail regularly. The main problem for me was the float hanging up after rebuild. When you have the carbuerator rebuilt gently turn it upside down. You should hear the float move down when you do so. I took mine on and off a few times for adjustment before it would swing free.
I also shut my tractors off by shutting off the gas and letting them run down, which in theory means less cork/gasoline exposure.
For what its worth, good luck!

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Bob Kerr

10-10-2007 08:26:13




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 Remembered something else! in reply to moseed, 10-10-2007 06:28:33  
Come to think of it I did have the float hang up on mine because of a drip of sealer that was on the edge of the float opposite of the arm. It was catching the side of the float bowl I took a fine file and dressed up the drip and it stopped that. The sealer that is on Rices floats is compatable with alcohol. The old floats aren"t and will sink if alcohol is in the gas. HERE is something I did just remember about. I did notice on the inside of the bowl there is a machined grove going around the inside.After trial and error several times, I set my float to that line and it worked perfectly! I think the line was put there to help with assembly when it was new. I have seen the line cut in many of those carbs.

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