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Author Topic:   Carburetor trouble
fellers24
Member
posted June 06, 2003 04:57 PM
I need help guys. I have run into a problem I can't figure out. The float in my carburetor is colapsing. I have a holley 750 alcohol.I had a couple of people tell me to see if something was stopping up the vent. I took it apart and cleaned well. I have not run it yet, but I found nothing stopped up. Has anyone ever had this problem,and if you have what was causing it? I have run this carb for two years. At first it was the rear float but last week it done it to the front.I am using brass floats. I thought about getting the plastic floats or whatever they are made of ,but i did not know if the alcohol would hurt them.I know there has to be something simple causing this. Please help.


hamer36
Member
posted June 06, 2003 08:13 PM
I've had the same thing happen. I was told it was too much fuel pressure but I changed the float and it hasn't happened again, same pump. Go figure!


KPLugnut
Member
posted June 07, 2003 07:03 AM
A simple backfire at the end of the straights when lifting off the throttle will do this to a brass float. Fuel pressure cannot do it, unless of course, the bowl vent is plugged.
A collapsed float will not have the same buoyancy as a normal one and should be changed, as there is also the chance for a split seam allowing the float to sink.

Hope that helps,
KPLugnut


fellers24
Member
posted June 08, 2003 10:44 AM
I think you gave me the answer. I have been having engine problems all year and the engine has been runnig bad on and off. It has been back firing at times.Would it be in my best interest to get the plastic floats? Thanks for your help KPLugnut.



Alltel
Member
posted June 08, 2003 03:47 PM
We had the same problem, but ours was too much fuel pressure. The plastic floats cured the problem, but they only last about half a season before the alcohol seeps through the place where they cut into the floats to make them beaveled for circle track use. Braswell is now making the plastic ones for cirlce tracks that aren't cut. Might give them a try.


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