Carburetor Question

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  #1  
Old 05-17-02, 06:39 PM
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leaking fuel on roto tiller

A friend of mine has a JD 6 hp roto tiller(techumsie?) engine that is giving him fits.
It leaks fuel out of the small hole above float bowl.
I told him to check float for fuel leaking into it.
It did have fuel in it and he replaced.
A few minutes after running fuel started to leak out again.
Then he replaced needle & seat, ran fine then started to leak out again.
Anyone have any ideas and is there a chance the carb. is cracked?
Thanks
 
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  #2  
Old 05-17-02, 10:45 PM
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Hi rajung!

There is a chance it is cracked, but not likely. The problem is more likely a sticking float, misadjusted float, leaking seat, etc...

Did he remove the old seat before installing the new? Is the bore that the rubber seat pushes into pitted, scratched, or corroded? The fuel could leak between the carb housing and the seat if it is not sealing well. The floats on these tend to stick also, mostly at the hinge pin. Make sure the float travels easily up and down, without sticking a little at the down position. Also make sure the new float isn't defective.

To check the adjustment of the float, turn the carb upside down. The float should be in the closed position. The float should be parralell to the carb body. If it isn't, bend the tab where the needle connects up or down as required.

Let us know how it goes!
 
  #3  
Old 05-19-02, 08:32 PM
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It's a rarity, but the float may have a leak in it. Take the float off and shake it. If you hear something sloshing around, it has a leak.
 
  #4  
Old 05-20-02, 04:46 PM
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Well we took the carb. off.
Flipped it over removed new seat and found a tiny chunk of the old one , replaced and still started to leak after float bowl filled up not running.
Removed again and adjusted new float and works great.
Thanks to all for posting suggestions.
 
  #5  
Old 05-20-02, 11:21 PM
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Good job! Glad you got it going!
 
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