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tolltech


Joined: Dec 28, 2008
Points: 7

carburetor leaks gas but not water.
Original Message   Dec 28, 2008 7:19 pm
OK. I'm so stumped on this I've scratched myself bald. I have a Bolens snowthrower with a 10hp tecumseh. This fall I took it out and turned on the fuel valve and it leaked profusely. Upon removing the bowl I found what I expected, a float filled with gas.It had a small and detecable hole in it. Fine, I replaced the float, needle and seat. Yes the seat is in correctly,( ringed end up into the carbs inlet shaft). The open end of the retaining spring is facing the inlet side of the carb.The float is set with a 11/64 drill. No gummed debris in this shaft. Everything is spotless. No housing cracks. But when I install the carb back onto the engine it continues to leak, A lot. I removed the carb and turned it upside down and blew into the fuel inlet. It sealed the air fine. reinstalled and it leaked. I did this several times even taking it apart to reinspect it. Next I injected water into the bowl and it stopped the flow as it should have. Even with ample pressure it would not leak. Cleaned and dried the carb and reinstalled it. I continues to leak gas. I Dumped the bowl of gas, reinstalled it, and without removing the card I injected water as it sat undisturbed on the engine. It wouldn't leak. No mater how much I tried. Great, I removed the water and let the gas flow again. Yup ! it leaked. I'm done. That's it.Six hours later and no more hair. Now I wait until I can get this thing exorcised or someone has an answer. I've rebuilt many engines and carbs but this ones got me.
Hope someone can help. Before the next big storm! Thanks. Raymond
Replies: 18 - 22 of 22Next page of topicsPreviousAllView as Outline
tolltech


Joined: Dec 28, 2008
Points: 7

Re: carburetor leaks gas but not water.
Reply #18   Dec 30, 2008 8:57 am
 Niper

        Sounds like good advice. I've seen before much of the same, even where snow throwers that sit for long periods accumulate sediment in the line then cause this scenario but when I acquired this I HAD TO replaced the line as it leaked fuel half way through the first winter( 06) and ignited into a rather frightening scenario. This engine is an 1983 model. So the line is new and at the time I also removed and cleaned out the tank. I have not since my last notation been able to work on it so I will report my results then. Supposed to snow tomorrow so tonight will be a do or die retry.

Raymond

tolltech


Joined: Dec 28, 2008
Points: 7

Re: carburetor leaks gas but not water.
Reply #19   Jan 5, 2009 2:26 pm
ITS WORKING !!!!

    No leaks as of yet. Used it Friday morning with no more leaking. I believe the solution was loosening of the retaining spring that holds the needle to the float lever. This ( again I believe) alowed the needle to better center its self when moving up into the seat. If this is not the case then I'm at a loss to any other reason. But its working so I'll leave it at that !

Thanks for all those that did come back with helpful comments.

Raymond

Bill_H


Location: Maine
Joined: Jan 12, 2008
Points: 354

Re: carburetor leaks gas but not water.
Reply #20   Jan 5, 2009 9:32 pm
hirschallan wrote:
This one just went past me.Can someone explain what this is all about. What it does and how to use this technique.

From a Tecumseh manual:


Someone once posted the link to this manual here but I can't find it. It's a pdf, send me your email address and I'll send it to you (unless someone else can repost that link, please).

This message was modified Jan 5, 2009 by Bill_H


Who the hell let all the morning people run things?
hirschallan


If it aint broke don't fix it !!


Location: Northern Hills of NY
Joined: Aug 25, 2005
Points: 327

Re: carburetor leaks gas but not water.
Reply #21   Jan 6, 2009 12:39 am
" KEEP UP THE GOOD WORK"

This  forum is just full of great people and info.Always get the answers you look for.I'll check by a few times a day just to see how to help someone or how someone is being guided to a soloution.

Bill,

Thanks ! I figured it was something as you described but never seen it anywhere.

Allan

This message was modified Jan 6, 2009 by hirschallan


nhmatt


Joined: Dec 21, 2008
Points: 104

Re: carburetor leaks gas but not water.
Reply #22   Jan 10, 2009 9:51 am
What an awesome thread. 
Replies: 18 - 22 of 22Next page of topicsPreviousAllView as Outline
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