View Full Version : Holley carb 75021-1

09-11-2008, 07:23 PM
I have a carb with part number 75021-1, but holley doesn't have it listed. It is a marine carb and everything I read it is equivelant or is a 4150 600cfm. I can not get the idle to where it needs to be. I backed the idle screw all the way out and had the throttle cable disconnected but it seems the throttle will only go back so far. If I look behind the springs I can see an orange plastic piece and a black. The black looks to be holding it from moving any more. I looked on the forum and could not find what I was looking for.

Can anyone help?


09-11-2008, 07:39 PM
Try this link. This guy has a similar problem with the same carb and there are diagrams and pictures. Might help.