4010 flooding

[cat herder]

This carb has sight plugs and floats are adjusted while running just like any other 4150. It has the standard nut and lockscrew arrangement, adjustable, not like the weird Ford 4180s or whatever with nonadjustable floats.

I'll adjust them like any other where fuel is just about to dribble out, lock them down, let it run a while to stabilize. Close it up and go for a drive and everything is fine, runs clean. Then some time later I notice it's dropping too low when off-throttle, and getting blubbery, and smoking, and when I pull over and check it the boosters are pouring fuel out. Pulling the sight plug unleashes a garden hose of fuel out the side. Remove N/S, blow clean (or change to one of the spares I have to carry), reassemble, and all is fine again until it does it again.

edit: Oh, and, it's usually only one bowl or the other that does this (only once did it get both bowls at the same time). Both bowls have the same fuel pressure from the same source through the same single 3/8" hose.

[GTO Geoff]

Say a prayer to Allah...

[cat herder]

This is probably a bad idea.

1.25" venturi + annular = 4-cylinder carb.

[57 210]

Hey Cat
Try lowering the float 1/8 inch lower than your doing it now. It seems your trying to set the float to just below the point where it dribbles; and when it gets heat in it or sloshes it spills over. Whatever it is an easy test. Good luck

[cat herder]

It's not slightly spilling over, it goes from properly adjusted float level to completely uncontrolled and pouring out the boosters. You ever had one with a bad o-ring or a piece of trash stuck to the needle? It's like that. It is not an adjustment issue.

[cat herder]

When I say 'just about to dribble out', I mean dribble out of the sight hole in the side of the bowl - the bottom of the threads wet but not actively running out. I did not mean I was trying to set the float level where it was just about to dribble out of the boosters.

[rgalajda]

Well I just had a 50483 Holley marine carb model 4010 show up on my bench. I removed the top of the carb to look inside. Duracon ( plastic ) floats, fuel bowl and floats are so clean you wouldn't think it ever had gas in it.
There is no site glass or removable plug to set fuel level, so what do you set the float level to. Dry float setting.
The kit instructions do not have a dry float setting.

By the way , you can not use a brass float in these carbs.

Duracon float settings for a 4150/4160 centre hung are 5/16 primary and 3/8 secondary, but this is not a 4150/4160 .

[cat herder]

I have here in the pile a 84010 (600 vac, square), 84011 (750 vac, square), 84013 (750 mech, square), 84014 (650 vac, spreadbore), 84016 (650 mech, spreadbore), & 84017 (800 mech, spreadbore), with multiple examples of several of the numbers. Every single one of them has conventional sight plugs and standard Holley adjustable needle and seats. If the marine versions have something different, they do not apply.

[cat herder]

Sight plugs (needles are currently removed but they are the same 5/8" hex adjuster and flathead lockscrew and .110" needle/seat as a plain center hung 4150):

Where the floats hang under gravity after adding float springs (without the springs they hang absolutely straight down and as a result do not like more than 3 - 3.5 PSI fuel pressure - without the springs they have this pressure sensitivity with either the original plastic floats or the nitrophyl floats)

In every way that matters, this float/needle arrangement should be functionally the same as any other 4150 with externally adjustable floats and center hung bowls.

[cat herder]

https://www.tapatalk.com/groups/racingf ... -t775.html

I am not a numpty noob, I have just been away doing other things awhile.