The Ford Barn

40ford · 05-30-2011, 01:22 PM

I have 1940 with 59Ab engine.The carb is a 94 and I noticed after driving car and it sets for about 15 minutes it is hard to start.I looked down into carb and found it dripping gas on both sides.I did adjust the float but that did not seem to help.What else can I check or do?

JWL · 05-30-2011, 01:26 PM

The most likely cause is either a leak at the power valve gasket or a ruptured diaphram within the power valve.

ford1 · 05-30-2011, 01:27 PM

two things, gas being boiled out of carb or the power valve is blown and leaking

jack in san diego · 05-30-2011, 02:32 PM

It is probably the power valve has blown. Good luck. Jack

flatjack9 · 05-30-2011, 04:13 PM

Look down the carb when it is running at idle to see if fuel is coming out of the nozzles. If not, the power valve should be alright and the float setting is not too high. Probably need to find a phenolic insulator to mount under the carb to isolate it from the hot manifold.

Human Fly · 05-31-2011, 02:08 AM

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Also chceck for a hole in the float, I had that once!

Mart · 05-31-2011, 05:32 AM

Could also be leaking needle valve. I had to revert to the old style steel tipped valves to cure leakage on my carbs. i also had the punctured float problem once, happened at the drags while waiting to run and knocked me out of the meet.

Mart.

05-30-2011, 01:22 PM	#1
40ford Senior Member Join Date: May 2010 Location: Cherryville,N.C. Posts: 535	Carburetor Dripping: I have 1940 with 59Ab engine.The carb is a 94 and I noticed after driving car and it sets for about 15 minutes it is hard to start.I looked down into carb and found it dripping gas on both sides.I did adjust the float but that did not seem to help.What else can I check or do?

05-30-2011, 01:26 PM	#2
JWL Member Emeritus Join Date: May 2010 Location: Fitzgerald, Georgia Posts: 2,204	Re: Carburetor Dripping: The most likely cause is either a leak at the power valve gasket or a ruptured diaphram within the power valve.

05-30-2011, 01:27 PM	#3
ford1 Senior Member Join Date: May 2010 Location: oroville ca. Posts: 1,554	Re: Carburetor Dripping: two things, gas being boiled out of carb or the power valve is blown and leaking

05-30-2011, 02:32 PM	#4
jack in san diego Member Join Date: May 2010 Location: El Cajon CA Posts: 73	Re: Carburetor Dripping: It is probably the power valve has blown. Good luck. Jack

05-30-2011, 04:13 PM	#5
flatjack9 Senior Member Join Date: May 2010 Location: Oshkosh, Wi Posts: 4,527	Re: Carburetor Dripping: Look down the carb when it is running at idle to see if fuel is coming out of the nozzles. If not, the power valve should be alright and the float setting is not too high. Probably need to find a phenolic insulator to mount under the carb to isolate it from the hot manifold. Last edited by flatjack9; 05-31-2011 at 12:01 PM.

05-31-2011, 02:08 AM	#6
Human Fly Member Join Date: May 2010 Posts: 59	Re: Carburetor Dripping: Sponsored Links (Register now to hide all advertisements) Also chceck for a hole in the float, I had that once!

05-31-2011, 05:32 AM	#7
Mart Senior Member Join Date: May 2010 Location: Solihull, England. Posts: 8,755	Re: Carburetor Dripping: Could also be leaking needle valve. I had to revert to the old style steel tipped valves to cure leakage on my carbs. i also had the punctured float problem once, happened at the drags while waiting to run and knocked me out of the meet. Mart.