Need thoughts, have a 53 SC that dad & i can not make run the more we work on the carb the worse it gets(not normal for us) runs nice at 1/2 throttle, perfect at fulll. we have cleaned,and cleaned, and lowered float. runs rougher. wont idle-which was the problem to start with. we think we are loosing vaccum in carb, nether load or idle adjusts make any difference. thanks.
If we need a new carb who do we trust believe its a 11535 zeneth