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Gas flowing from carbs during startup/

Posted by 912Landy

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Gas flowing from carbs during startup/ #1
912Landy dave corey Kingsland, Ga., USA	Posted: May 20, 2012 02:31PM Registered: 1 year ago Posts: 21

Good Day Gentle People,
What causes gas to flow from the carbs during startup and how to fix the situation! Thanks, dave

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Re: Gas flowing from carbs during startup/ #2
Bob Agar Robert Agar Green Valley, AZ, USA 1953 MG TD "Myrtle Anne" 1957 MG MGA 1500 Coupe "Miss Scarlett" ~ For Sale ! ~ 1974 MG MGB "The Mistress"	Posted: May 20, 2012 02:49PM Registered: 5 years ago Posts: 1,997

Sounds like stuck floats/valves. Is the fuel coming out of the overflow pipes?

1974.5 MBG Tourer with Weber 32/36 mod and AC.
1957 MGA 1500 Coupe - Stock and original except paint
1953 MG TD - Original car with no mods

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Re: Gas flowing from carbs during startup/ #3
912Landy dave corey Kingsland, Ga., USA	Posted: May 20, 2012 03:01PM Registered: 1 year ago Posts: 21

Hello and thanks!
Yes to the location of the flow. The problem does not exist if restarted right after it runs a bit. Usually...however, the next day the carbs overflow. Hate to keep it running 24/7 !! The ticklers seem free and the is fresh me thinks~~!

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Re: Gas flowing from carbs during startup/ #4
oldtee John Lewis Centreville, MD, USA	Posted: May 20, 2012 04:46PM Registered: 1 year ago Posts: 91

Mine did that and a smart smack with an open end wrench stopped the leak. Float is sticking.

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Re: Gas flowing from carbs during startup/ #5
ddubois Dave DuBois Bremerton, WA, USA	Posted: May 20, 2012 04:49PM Registered: 7 years ago Posts: 4,277

Dave - Your problem sounds like a maladjusted float lever that drops too far, allowing the needle to to become jammed against the float lever. See the article, Float Lever Drop Adjustment in the Other Tech Articles section of my web site linked in my signature block below.

I would also check where the fuel in your float bowl is going overnight. The level of fuel in the float bowl should remain constant over night unless there is a slight leak around the securing banjo bolt or a crack in the casting.
Cheers,

Dave DuBois
1953 MGTD
1966 MGB
http://homepages.donobi.net/sufuelpumps/

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SU Fuel Pumps & More SU fuel pump restoration and conversion to solid state. Information and technical articles on SU fuel pumps.

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