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LEAKING CUB CARB

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RICK FROM VERMO

12-11-2006 16:59:02




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I have a 1951/52 cub. Starts good, gallups sometimes when it's running, but, when I shut it off, even though I turn the gas off at the sediment bowl the carb. drips gas until the tank is empty. Do I have a stuck float or is the needle valve simply not seating well. I have bought a new sediment bowl and will be replacing it too.




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John in Ct

12-12-2006 13:16:01




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 Re: LEAKING CUB CARB in reply to RICK FROM VERMONT, 12-11-2006 16:59:02  
I had a similar problem with my 154. It is possible that the metal on the top half of the carb between the needle valve and carb top is a little pitted. I took a flat stone and made the top part of the carb around the needle valve hole smoother and that solved that. Also, those IH needle valves leaked on me. Was given a Kohler needle and seat and it works great. I was told that it was from a Kohler 10 horse. I was wondering if anyone out there would know the part number? The parts guy at kohler is a real #$#%$R% and can't be bothered to look in his stock.

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Bigdog

12-12-2006 04:57:26




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 Re: LEAKING CUB CARB in reply to RICK FROM VERMONT, 12-11-2006 16:59:02  
You have 2 problems. If you close the valve at the sediment bowl gas should not leak from the tank. Replace or repair the sediment bowl.
Secondly, the float valve can leak around the seat even if the needle / seat fit is good. Remove the seat from the carb and re-install it with some sealant to prevent leakage around the seat. This is probably a more common problem than leaking seats themselves.

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billde

12-11-2006 19:01:47




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 Re: LEAKING CUB CARB in reply to RICK FROM VERMONT, 12-11-2006 16:59:02  
Those little IH carbs are very sensitive to float setting. Make sure the gasket is in place when you measure, it is better to have a little less fuel in the bowl than too much.



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NE IA Dave

12-11-2006 18:06:06




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 Re: LEAKING CUB CARB in reply to RICK FROM VERMONT, 12-11-2006 16:59:02  
I simply can not think for more than a spit second that it could be anything besides the needle valve or float / float adjustment. If you insist on a new carb please give me first chance at your scrap iron pile. You simply do not need a new carb---unless there is a crack near the needle valve or something. It should be a very very inexpensive fix. NE IA Dave



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SuperA-Tx

12-11-2006 19:33:30




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 Re: LEAKING CUB CARB in reply to NE IA Dave, 12-11-2006 18:06:06  
Dave,

I dont want to take over this thread that isnt mine but since its along the same line,... I hope no one gets mad.

Im no mechanic so I had a guy that worked on carbs to the stuff for me. Honest, I dont think he knows about carbs any more than me (thats what you get in small towns).

If I had it to do again I would just get a new carb and be done with it. Replace this,...Replace that,..., adjust this,..., well you know, that gets old and it still dont work.

The carb will be outback by the brush pile. Wait til after Christmas tho, Santa may not make it this year.

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NE IA Dave

12-12-2006 10:03:38




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 Re: LEAKING CUB CARB in reply to SuperA-Tx, 12-11-2006 19:33:30  
I would not hesitate to tear it apart yourself, there is alot of satisfaction in fixing it yourself. I used to be like you -afraid of not knowing how to fix it. This is kind of like the first time you were introduced to a computer. That carb is a very simple devise, pretty much like the float in your indoor plumbing---float rubbing or not set correct--hole in float--the float valve (needle valve) having rust in the seat. That my friend is pretty much all there is to your problem. If your main man is not on top of things, ask if he put the gasket under the needle valve. Make very certian the leak is not from a gasket and appearing as from within.

They seriously aren't that difficult. and like I stated before the cost of a float-or needle valve won't be more than the postage on your new carb. I have seen alot of goofers fixed by profesionals, they are human and all. There are alot of good quality carb men out there. Mistakes are never impossible for anyone. I wish I had some spare time because I would sure give it a try, but It would be a month or two before I get kind of caught up. I have made alot of promises that I am going to have to face up to.
I personaly would asked the guy to state his policy on redo's. Most anyone will make it right, unless he did a free bee for you in the first place. I would think he should redo for parts only. However -- I certianly will stick up for the guy if you do not have a good filter system for the gas before it gets to the carb. Rust is harder than gas, --NO one can fix a carb with rust coming through the needle valve- and the new gas is said to be harder to stop leaks than the old. As long as you do not break the casting you will not be out anything,if you do go at it yourself, and you will still have a core credit. I wish you the best of luck. NE IA Dave

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SuperA-Tx

12-11-2006 17:45:05




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 Re: LEAKING CUB CARB in reply to RICK FROM VERMONT, 12-11-2006 16:59:02  
I just got finished with the carb on my SuperA. Was leaking like yours, a drip every now and then.

New sediment bowl and gasket, new kit, and new float. Still leaks! I turn it off at the bowl and let the engine run until all the gas is used now but it still bugs me.

I took that thing off seven or eight times and I know I painted it six times at least. Had it in carb cleaner four times. $70 down the drain, rather out the carb.

I resorted to leaving Santa a letter tonight asking for a new carb. Hope he finds it.

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dan hill

12-13-2006 03:49:19




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 Re: LEAKING CUB CARB in reply to SuperA-Tx, 12-11-2006 17:45:05  
Dirt in the needle and seat is the cause of most carb leaks.In any case the fuel must be shut off when the tractor is idle.A hole in the float is a common cause of rough running.I bought a 77 chev pickup from a fellow who complained about poor gas milage.I found the plastic carb float had absorbed gas, the vacuum advance didnt work and the auto choke pull off only opened the choke part way.The truck was easy on gas if you kept it under 50 mph.Replacing the 4 bbl carb would have cost plenty, new float cost 5.00.

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CHARLIE H

12-11-2006 17:29:01




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 Re: LEAKING CUB CARB in reply to RICK FROM VERMONT, 12-11-2006 16:59:02  
MY GRAHAM BRADLEY DID THE SAME THING I FOUND THE FLOAT HAD A PIN HOLE IN IT WHEN IT WOULD FILL UP IT GOT HEAVY CAUSING FUEL TO FLOW



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old

12-11-2006 17:10:14




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 Re: LEAKING CUB CARB in reply to RICK FROM VERMONT, 12-11-2006 16:59:02  
Could be the float isn't set right, junk in the seat so the needle will not close as it should, or a stuck float,but you also need to shut the gas off any how. The gravity flow fuel systems almost always leak a little no matter what even with out haveing a carb problem.



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