su carb "spiting" gas!!!!!

[zeiss150]

HELP!!! Here is what happened, I filled up my gas tank and started driving around and gas started spitting a steady streem out of the front carb float boal vent pipe???! So I figured that the float needle wasn't shutting off the gas. I took it apart and fixed it or should i say tried to fix it. I put it back together and the exact same thing happened. What is going on? Its a new needle I addjusted it today! the butterfly valve is working im lost. Help!!!!

[2Forty]

Did you check to see if the float is stuck?

[beandip]

did you check the float to see if it has any fuel in it ? It may have a leak. or set so the level of the fuel is too high in the float chamber. :classic:

[zeiss150]

Hey beandip, I did adjust the float as well as checking to make sure that nothing was blocking the needle. The gas was comming out of the float bowl vent so the float bowl is definatly filling up. could something be going on with the head, or am i just reall not adjusting the needle right?

Thanks

[beandip]

There is only a couple of things that it could be. The float level is too high or the shut off needle is not shuting off , leaking ,stuck, a little piece of crud stuck in the way of the needle, or the float has a hole in it and is sinking. All these will cause what you are describing. You dident just install a new electric fuel pump did you ? If so check the pressure .:classic: I dident ask if the float BOWL was filling up but the FLOAT ITS SELF.

[zeiss150]

hey beandip, Im pretty sure that the float is solid. Its not the metal kind its the plastic kind. I'll dubble check though. thanks for your help beandip.

[Bruce Palmer]

Can only be one of three things.

1. Sunk Float

2. Leaking needle and seat

3. Fuel pressure too high.

My guess is 2. They need to be replaced every 20 years or so. The rubber tip gets worn and hard kinda like us.

3-3.5 # of fuel pressure is about all the needles and seats will handle.

Our JUST SUs video is a great tool to have in the tool box for keeping these carbs going trouble free. Not much to an SU and if the are clean and adjusted, they are hard to beat.

[zeiss150]

Thanks bruce, I fixed it! It turns out that some how some dirt got past my filters and cloged the fule line from the float bowl to the get. With that cloged line the fule pressure must have been enough to push the needle down. I would love to buy the ztherapy video but you don't sell it in DVD. I dont have a VCR any more. Please let me know if you can get me one on DVD. Thanks bruce, and Beandip too. This web site rocks!!!!

Zeiss150