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Discussion Forum

H carb rebuild

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RK Smith

03-06-1999 05:34:21

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I'm in the rebuild process and find out the float has some gas in it. So, I figure it's pointless putting it back in since it won't float if it gets full of gas. Any ideas on how to solve this problem. I'm afraid to just jump in and start something before getting some good advice. Thanks in advance, RK Smith.

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03-07-1999 18:22:33

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 Re: H carb rebuild in reply to RK Smith, 03-06-1999 05:34:21  
in the future try running the tractor out of gas or drain it, especially if it will be left sitting for a long period of time. As you can see corrosion, it just happens. Every time I put my tractor away even for a day I drain the fuel bowl.

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Bob M

03-06-1999 07:04:27

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 Re: H carb rebuild in reply to RK Smith, 03-06-1999 05:34:21  
You need to either replace the float, or else get the gas out of it and patch the hole.

To drain/patch the float, I've had success doing this:

1 - Find the hole. Clean and dry the float, then warm it up a little (NOT with a flame!!). I simply hold it close to a 150 watt floodlight for a couple minutes. The leak should show up as a damp spot on the outside of the float - usually at a solder joint. Mark the leak.

2 - Get the rest of the gas out of the float. I simply left the spotlight shining on the float overnite (and OUTDOORS!). The heat evaporates the gas inside the float.

3 - Carefully clean and solder the leak. (I've heard of guys using epoxy instead of solder, but have never tried it myself...)

4 - Test the float: Put it in tin can and weight it down so it stays on the bottom of the can. Then put some gas in the can so the float is submerged. Leave the whole business overnite (the can covered and outside of course...) The next morning remove the float and shake it to see if any gas got inside. If the float is dry inside you should be all set.

Good luck!

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Bill (Tx)

03-06-1999 18:28:06

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 Re: Re: H carb rebuild in reply to Bob M, 03-06-1999 07:04:27  
If you don't have access to a soldering iron, try the epoxy. I had to patch a leak in a 9N gas tank and is holding fine after 2 months. I believe epoxy is used in some coating applications where extreme chemical attack by solvents is expected.

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Bob M

03-06-1999 20:30:56

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 Re: Re: Re: H carb rebuild in reply to Bill (Tx), 03-06-1999 18:28:06  
Yeah - good epoxy (BJ Weld or similar) should work fine. I successfully a patched gas tank with the stuff - no leaks 5 years later. Probably easier than soldering too. Just make sure the metal around the leak is absolutely clean before putting on the epoxy.

Bob M

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RK Smith

03-06-1999 20:42:20

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 Re: Re: Re: Re: H carb rebuild in reply to Bob M, 03-06-1999 20:30:56  
Thanks to all on the carb work. I've decided for $18 to order a replacement. My parts man matched it up with the picture of one for a Cub, - hope it's right, since it looks right. I'd probably spend that much on the materials (solder, epoxy, etc.) not to mention time. Thanks anyway. I'm gonna wimp out. Just finished the rebuild, waiting for the float and we'll fire it up.

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Bob M

03-07-1999 10:57:53

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 Re: Re: Re: Re: Re: H carb rebuild in reply to RK Smith, 03-06-1999 20:42:20  
$18 well spent!!

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