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Setting carb float seat needle - 2007 Nissan 1400 Bakkie

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1979 FoMoCo 4 Barrel carb. Getting good fuel flow and pressure to the carb. Engine will start and run for a few seconds then run out of fuel. New fuel pump has been installed. Can blow through gas...

is the needle opeoning on the float in the carb? The fuel bowl should be about half full all the time. As fuel pressure flows into the needle & seat, it fills the fuel bowl until the float pushes the needle into the eat. Sometimes the rubber tipped needle can stick in the seat.

Holley carb? Autolite carb? Holley 4160?

Sep 09, 2011 | Ford Econoline Cars & Trucks

2 Answers

To much fuel coming through carb float is not stuck 8 horse brigs

the fuel float cut off needle valve has dirt under it ,strip and cleañ

Jun 12, 2010 | Cars & Trucks

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Engine stalling due to too much fuel. Fuel in crankcase.

sounds like your float in the carb is stuck or the needle valve is bad. remove the bowl and push the float up to level. this should stop the fuel flow. be aware that only slight pressure should be needed.if it does not ck the needle valve. also mak sure you float is not damaged.

Dec 05, 2009 | Cars & Trucks

1 Answer

I have a 1952 dodge flat head six it has a stromberg one barrel carb the car has fluid drive transmission I rebuilt the carb and now when you try and start it the float compartment fills with gas and leaks...

Fuel level in float bowl is controlled by the float 'needle' being 'seated' in the seat in the inlet port.Check float level.A rule of thumb is needle should seat when top of float is parallel with gasket surface.Check that float hasn't 'sunk' i.e. filled with gas.If an electric fuel pump has been fitted,it's possible pump pressure is over-powering float action.

Oct 21, 2009 | 1991 Dodge Ram 150

1 Answer

1954 CORVETTE,3 CARTER YH CARBS, SET FLOATS @ 3/8 '' with a 2'' drop to bottom of float. Engine runs fine, but carbs leak gas freely upon shutting engine ''off''. Why? and how can this be fixed?

Check the needle and seat in the carbs, sounds as if the needle is not seating allowing gas to flow till pressure in the lines drop. Since bowl is full the gas will force its way out any place it can. Usually a gasket. Good luck!! Hope I gave you an idea of where to look.

Oct 02, 2009 | 1965 Chevrolet Corvette

3 Answers

I have a 2 barrel carb off a 283ci 1967 chev carter carb

no spring poss small wire from needle to float! the way it works is float is up needle close because float bowl full--when fluid or gas goes down valve opens lets fluel full pump disconnect line at carb crank over with guage should have apprx 7psi of press not less then 5psi carefull gas flameable

Aug 30, 2009 | Chevrolet Chevy Cars & Trucks

2 Answers

4 barrel carburator float sticking . Engine flooding out

Replace float. If it's a metal one, it probably has a hole in it. If its the other kind, it's probably water logged, or else your carb is gummed up and the needle valve is sticking.

Jun 08, 2009 | 1986 Chevrolet Chevy

1 Answer

Gas leaking out of a 1983 cordoba top of carburetor

Did the carb kit come with a new float? It sounds like the float level is not set right, it has a hole in it or the needle is not seating right. If the float is not set correctly it will hit on the carb body before it shuts off the fuel flow with the needle and seat. If the float has a hole in it it will fill with fuel and not float at the proper angle to shut the fuel off when the desired level is reached. Remove the top of the carb and inspect the float when closed it should be just about level with the top plate from the carb. Shake the float and see if you hear any liquid in the float. Also are you running a mechanical or electric pump? Mike
P.S. I myself have forgotten to install the needle in a carb rebuild.

Let me know how you make out.

Jan 05, 2009 | 1983 Chrysler Cordoba

1 Answer

Hi there 1960 series 2 land rover. Problem - idles ok on flat but dies on the slope/hill. Have put new parts in solex carburettor (Float etc). Is it the fuel pump?

Speaking solely from experience with working on and tuning different types of carburetors,mostly racing type cars,a carb engine that dies on a slope is starving for fuel,obviously,and more often than not it's either the float level and drop,or needles and seats.It is critical to measure and set the drop of the floats to prevent fuel starvation,as well as the maximum level allowed by the floats,to prevent flooding out the top.Needles and seats regulate the fuel coming into the carb based on the float level,so they are tightly intertwined with one another.Later versions of carburetors have high flow,and/or spring loaded needles and seats for extreme 4x4 climbing,so that starvation isn't an issue.Check fuel pressure from the pump,as well as volume,Volume is as important as pressure.You can measure volume easily with an empty jug and a helper to crank the engine over while you hold the fuel line into the jug,and watch how much fuel it's pumping.Easy and cheap check,plus you can watch what kind of pressure the pump is developing.6 psi is about the standard for carbs at the inlet.Racing engines can run 7-8 psi fuel pressure.Good luck.

Jul 24, 2008 | Land Rover Discovery Cars & Trucks

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