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Tecumseh Carb Leaking from Mixture Screw


nova72's Avatar
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08-27-14, 11:46 AM   #1  
Tecumseh Carb Leaking from Mixture Screw

Hi, I have a Tecumseh Series 1 carb on a 7 HP Snapper snowblower thatís leaking gas on the bottom of carb. It appears to be leaking around the main mixture screw on the bottom of the carb. Itís not leaking around the bowl nut. Iíve replaced the o-ring on the mixture screw and also replaced the entire mixture screw/bowl nut assembly with a new one. Float level has also been checked. Gas still appears to be leaking around the mixture screw. Any idead how to eliminate this leak or what else to look for? Thanks in advance!

 
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08-27-14, 12:58 PM   #2  
It probably needs a new gasket on the bowl nut. Have a good one. Geo


Last edited by geogrubb; 08-27-14 at 03:26 PM.
 
nova72's Avatar
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09-08-14, 05:53 AM   #3  
Replaced bowl nut gasket - twice. Still leaking. Any other suggestions?

 
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09-08-14, 07:27 AM   #4  
There could be a pin hole in the bowl hold it up to a bright light.

 
nova72's Avatar
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09-19-14, 08:25 AM   #5  
Fuel bowl is new, no holes.

 
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09-19-14, 10:17 AM   #6  
Is the spring with the backup washer still on the screw?


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09-19-14, 11:15 AM   #7  
Are you sure it's not leaking at the top and running down the side of the bowl. Have a good one. Geo

 
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09-19-14, 03:26 PM   #8  
Pull the float bowl back off,and shake the float to see if the float has gas in it.If so replace.Hope this helps.

Jerry

 
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09-20-14, 04:13 PM   #9  
Hi,

Backup washer and spring are in place.

Side of bowl is dry, side of bowl nut is dry. Definitely leaking at mixture screw.

Has bowl off several times. no gas in float. It's a plastic one.

 
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09-21-14, 07:44 PM   #10  
I'd say either there is a scratch in the surface that the o-ring seals against, or the o-ring is a hair too big to fit tightly and seal around the screw.


"Who is John Galt?" - Ayn Rand (Atlas Shrugged)

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