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3020 carb load mixture adjustment


 
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MikeDean
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PostPosted: Thu Sep 12, 2019 8:52 am    Post subject: 3020 carb load mixture adjustment Reply to specific post Reply with quote

3020 with a Marvel Schebler carburetor, the load mixture adjusting screw stays ?loose? after adjusting. So loose that it?ll turn itself out while running. The o ring has been replaced. Any ideas?
 
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Bob
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PostPosted: Thu Sep 12, 2019 9:04 am    Post subject: Re: 3020 carb load mixture adjustment Reply to specific post Reply with quote

Is this the mixture screw in the fuel cutoff solenoid?
 
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MikeDean
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PostPosted: Thu Sep 12, 2019 9:11 am    Post subject: Re: 3020 carb load mixture adjustment Reply to specific post Reply with quote

Its in the correct position on the carb and when adjusted it runs well. But when it runs the screw vibrates out. Never tightens.
 
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Mike M
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PostPosted: Thu Sep 12, 2019 10:20 am    Post subject: Re: 3020 carb load mixture adjustment Reply to specific post Reply with quote

Maybe try some non hardening or hardening Permatex on the threads ?
 
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Russ from MN
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PostPosted: Thu Sep 12, 2019 10:48 am    Post subject: Re: 3020 carb load mixture adjustment Reply to specific post Reply with quote

A lot of mixture screws have coil springs over them to prevent this, can you put one on this one. Where I used to work we would wrap threads with teflon tape to prevent vibration from turning them, but don't let any tape get into the carb!
 
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MikeDean
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PostPosted: Thu Sep 12, 2019 1:40 pm    Post subject: Re: 3020 carb load mixture adjustment Reply to specific post Reply with quote

Thanks, I?ll give that a try
 
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MikeDean
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PostPosted: Thu Sep 12, 2019 1:44 pm    Post subject: Re: 3020 carb load mixture adjustment Reply to specific post Reply with quote

I was thinking of the tape but was also worried about anything getting into the carb. Thanks
 
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Bob Harvey
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PostPosted: Thu Sep 12, 2019 5:02 pm    Post subject: Re: 3020 carb load mixture adjustment Reply to specific post Reply with quote

Make sure it is squeaky clean before you apply any goop.
 
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MikeDean
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PostPosted: Thu Sep 12, 2019 5:58 pm    Post subject: Re: 3020 carb load mixture adjustment Reply to specific post Reply with quote

I will,thanks
 
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