4 Barrel Carb Adjustment
Posting Guru
Joined: Mar 2010
Posts: 1,196
Likes: 2
Loosen the lock screw, turn the adjusting nut with a 5/8 wrench. Clockwise lowers the float, counterclockwise raises the float. When you're to a satisfactory level, retighten the lock screw. You want fuel at the bottom edge of the sight hole. You may have a couple trips back and forth starting the rig to get her dialed in. You shouldn't adjust the nut more than a 1/4 turn at a time.
Posting Guru
Joined: Feb 2007
Posts: 1,735
Likes: 2
From: Wingo, Ky
Loosen the lock screw, turn the adjusting nut with a 5/8 wrench. Clockwise lowers the float, counterclockwise raises the float. When you're to a satisfactory level, retighten the lock screw. You want fuel at the bottom edge of the sight hole. You may have a couple trips back and forth starting the rig to get her dialed in. You shouldn't adjust the nut more than a 1/4 turn at a time.
Posting Guru
Joined: Mar 2010
Posts: 1,196
Likes: 2
I guess I just assumed. So I suppose you forgot the part to tell him what he needs to do? So I'll let you take it from here.
To the OP, a part number would be nice if you can find it. It should be on the choke tower.
To the OP, a part number would be nice if you can find it. It should be on the choke tower.
Posting Guru
Joined: Feb 2007
Posts: 1,735
Likes: 2
From: Wingo, Ky
All I did was add to what you said by saying some Holleys don't have external adjustment. No need to take it the wrong way.
1-Need to know for sure if it is externally adjusted or not.
2-Why do you want to adjust the floats?
Senior User
Joined: Jun 2007
Posts: 374
Likes: 0
704 Dentside Man, I rebuilt my Holley 4180 and I was adjusting the secondary needle set and its leaking gas around the nut and the lock screw. Why would that be? Its like its under pressure unlike the primary gas never leaked out. All new parts too.
Thread
Thread Starter
Forum
Replies
Last Post
whisler
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
5
Jun 29, 2017 11:03 AM
JRB65
1973 - 1979 F-100 & Larger F-Series Trucks
23
Dec 12, 2012 10:27 AM
ericford1984
Performance & General Engine Building
2
Dec 5, 2011 08:47 PM
