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urhere2 · 02-06-2005, 11:42 AM

I have an edelbrock 750 manual choke thats about a year old and it is pouring fuel out of the ports were you change the metering rods and springs. Being a novice when it comes to carbs, my guess is stuck floats. Does this sound right and if so, how would I fix this?

Thanks in advance.

urhere2 · 02-06-2005, 11:42 AM

I have an edelbrock 750 manual choke thats about a year old and it is pouring fuel out of the ports were you change the metering rods and springs. Being a novice when it comes to carbs, my guess is stuck floats. Does this sound right and if so, how would I fix this?

Thanks in advance.

Big Chief 541 · 02-06-2005, 12:46 PM

You will need to take the top off, remove the pin's that hold the floats (2) on the pegs, and check the needles. Note how the clip that holds the needle to the float is installed. Clean off any trash, inspect the rubber end on the needles (2). Any trash can be removed from the tips, re install all parts and see if this was a quick fix. IF there is a wear spot on the neoprene tips,(doubt it will ever seat again). Dont be afraid to get your hands dirty, buy a kit and rebuild according to the instructions

I rebuilt my first AFB on my 62 GP with little know how, and with no PYE board to fall back on in 1967.

shaker455 · 02-06-2005, 01:24 PM

I have the same carb, very simple you set up and tune with the book supplied, do you still have the book?

You need to set the upper and lower float levels according to the book, if you nolonger have it cam be downloaded off Edelbrock's site.

urhere2 · 02-06-2005, 10:06 PM

thanks for the replies. The carb worked fine until I tried to start it last tuesday and today. The car has been sitting for about a month since the last time I ran her.

I do have the book, but since the carb has less then 200 miles on it, I didn't think rebuilding was called for. I'll take the top off and check for trash tomorrow.

BVR421 · 02-06-2005, 10:39 PM

Could be crap in the needle/seat as mentioned or the carb got banged and the float is just stuck.
Flooding or no gas at all getting in is not at all uncommon after sitting dry for a while modern gasoline does strange things to carb when left to evaporate. Also its not uncommon for a float to stick in the open position when a dried out carb is turned upside down during handling

you are using a good filter just before the carb of course.

urhere2 · 02-07-2005, 07:43 PM

I have the carb in pieces now and I think one of the floats was stuck. I going to put it back together now and cross my fingers.

I run a canister filter just before the electric pump, and an inline just before the carb after the pressure regulator. Everything in the carb looks clean.

buwalda · 02-08-2005, 05:32 AM

When you re-assemble the carb, check that the floats are not bent to one side so that they hit the walls. There is not alot of clearance either side of the float, so they have to be pretty straight. Also check that the seats for the needles are tight. They should have a washer type gasket under them. The fact that both sides leaked sounds like dirt got in somehow.

BVR421 · 02-08-2005, 05:18 PM

I have had similiar experiences when installing carbs where I had to use a piece of rubber line somewhere after the filter. A little piece of rubber hose scratched off when slideing it over a sharp end of a steel line has got me more than once.

urhere2 · 02-08-2005, 06:54 PM

carbs back in and no leaks. I had to really lean it out from the previous settings to get a good idle. I am going to get some starting fluid to check for vacuum leaks next. I'm getting a slight stumble off idle.

p.s. I have #8 braided fuel line from the tank to the carb.

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