Tecumseh Carb Leaking from Mixture Screw

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  #1  
Old 08-27-14, 12:46 PM
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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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  #2  
Old 08-27-14, 01:58 PM
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It probably needs a new gasket on the bowl nut. Have a good one. Geo
 

Last edited by geogrubb; 08-27-14 at 04:26 PM.
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Old 09-08-14, 06:53 AM
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Replaced bowl nut gasket - twice. Still leaking. Any other suggestions?
 
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Old 09-08-14, 08:27 AM
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There could be a pin hole in the bowl hold it up to a bright light.
 
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Old 09-19-14, 09:25 AM
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Fuel bowl is new, no holes.
 
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Old 09-19-14, 11:17 AM
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Is the spring with the backup washer still on the screw?
 
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Old 09-19-14, 12:15 PM
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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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Old 09-19-14, 04:26 PM
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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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Old 09-20-14, 05:13 PM
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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.
 
  #10  
Old 09-21-14, 08:44 PM
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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.
 
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