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Leaky float?

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Dave from Mars

07-12-1999 05:14:03




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Many thanks for prior assitance! The last time I posted it was because my 2N just quit, as if I had turned off the key. Had spark, but no go. Not even a cough or burp when cranking. Turned out to be a stuck float (I think). A light tap on the carb allowed it to start.

But I'm still having problems, to the point I decided that a good carb cleaning was in order. The carb wasn't particularly dirty, but I noticed the float has some liquid inside. I can hear it. I looked for leaks, but can't find any. I'm assuming the float should be completely empty, yes?

There's not enough liquid to prevent me from reassembling the carb, so I did. I'm having the same problem as someone else who recently posted, in that the fuel won't stop flowing. I suspect the float's "neck" either bent slightly from the rebuild or the liquid inside is causing it not to float enough. Possible?

Dave

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David Sales

07-12-1999 13:13:21




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 Re: Leaky float? in reply to Dave from Mars (PA), 07-12-1999 05:14:03  
Dave,

I've had success in the past with a simple Loctite repair. Heat the float to evaporate the trapped gas (hair dryer or a couple of hours in the sun). Just flow a little Loctite (the thread locking type -- red, blue or green will work) around the seam. The capillary action of the Loctite will find the gap and seal it. Wait a day for good measure, wipe off any excess and reinstall. Loctite sets up in the absence of air.

The different color of the Loctites relate to their holding strengths. Not really an issue here, however the green color is the "wicking" type designed to secure threads already fastened. It might work better than the others, but I've had good luck with them all.


Good luck,
David

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llamas

07-12-1999 08:50:25




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 Re: Leaky float? in reply to Dave from Mars (PA), 07-12-1999 05:14:03  
Gas inside the float renders it useless.

If you can find the hole, and if it is not too close to the solder joint that hold the "horseshoe" bracket on, it is easy to repair.

Heat it with a hairdryer or on top of a stove until all the gas vaporises and is driven out. This may take a half hour. Let it cool completely, then buff the surface right at the hole. Solder hole shut with the smallest soldering iron that will do the job - you're looking for a tiny dot of solder, no more.

Suggest that you not use acid flux, this will remain inside the float and rot it out again. Rosin-core electrical solder will work just fine and leaves a non-corrosive residue.

llater,

llamas

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bg

07-12-1999 07:57:29




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 Re: Leaky float? in reply to Dave from Mars (PA), 07-12-1999 05:14:03  
Someone once suggested placing the float in a warm place(like in the sun)to allow the gas to vaporize and escape, then coating the whole thing with permatex. I think you'd be better off replacing the float. They don't cost that much.



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WFK(WA)

07-12-1999 06:28:53




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 Re: Leaky float? in reply to Dave from Mars (PA), 07-12-1999 05:14:03  
Dave, I posted a note a few weeks back with float troubles. Turned out to have a bunch of tiny pin holes causing the float to not work properly. For ten or twelve dollars you'll save yourself a pile of headaches. You may find that your new float may need a little adg. I never did get my carb to totaly stop dripping. A drip every 30 or so seconds is the best I could do with the engine off and the fuel on. Your I&T shop man. will take you through the proper steps. Hope this helps

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ZANE

07-12-1999 05:40:33




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 Re: Leaky float? in reply to Dave from Mars (PA), 07-12-1999 05:14:03  
The leaky float will definately cause problems big time.
You should get a new one and replace it.
I have repaired them but usually it just ain't worth the trouble and it could leak again shortly. These things are very delicate so that they will float.
You could use compressed air to blow around the outside of the float till the stream of air hits the hole in the float. This will cause the fuel inside to be forced out the hole by the compressed air inside the float.It can also burst the float completely if the air pressure is allowed to become to much inside the float. If you can find the hole in the float you can re solder it with a good soldering iron and acid core flux.
It's best however to replace the float and be done with it.
If you are a long way from the parts place then it might be worth a try at fixing it.That's what I have done on occasion.

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raytasch

07-12-1999 05:19:30




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 Re: Leaky float? in reply to Dave from Mars (PA), 07-12-1999 05:14:03  
Dave, Any liquid inside the float will render it useless to control gas flow. Suggest you search the archives for repair proceedures or purchase a new float. Good luck,
ray



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