Holley 885 ?

[1949mercury]

My carb is leaking where the fuel line goes into the carb, took the line off cleaned it up put some thread sealant on and was still leaking. Got a mirror and looked up at it and the fuel is coming out around the outer ring of where the line goes in. Kinda hard to explain but looks like it could be another seal ? Should I get a rebuild kit ? Or should I get another type carb set up ? If rebuild kit or new carb set up any recommendations?

 

[51 MERC-CT]

Have found that leaking that originates from the float valve cover (or other internal gasket) gives the appearance of leaking at the input connection when it flows down to that point.

 

[rotorwrench]

They can also leak where the float bowl attaches to the lower throttle body. I've seen some pretty warped castings that are impossible to seal. I keep a few spare part carbs around due to that. A heavy handed or careless mechanic can do more harm than good when working with these type carbs. The later models with no shroud are even more vulnerable.

 

[scicala]

Another possible place to leak in that area is the brass fuel inlet fitting that the fuel line attaches to. It has a round gasket on the fitting where it screws into the bowl casting.
Also, if the fuel level is too high or the carb is flooding over, fuel can run out of the same area.


Sal

 

[1949mercury]

I took the brass fitting out and there was no round gasket.i believe it’s leaking above where the fitting goes in. Also that screw underneath next to it was leaking also. I think I will get a rebuild kit and try that. Next would be a new carb set up

 

[1949mercury]

Yeah it’s leaking where the main body connects to the throttle body. So is that new gaskets or is there other issues going on making gas get down that far ?

 

[Kahuna]

Holley 4000 series carbs have a plug fitting like that .
It's prone to leaking also. I have used a small O ring to seal it.
Just a thought

 

[rotorwrench]

If the fit is still good on the hard parts, a new seal/gasket should do the trick. I use a small amount of a special aerospace fuel tank sealer on that connection just for insurance but it should work OK without it with good fit and quality seals/gaskets. With the right seal, the torque doesn't have to be white knuckle tight so be care full when you torque it up. Folks over torqueing that connection in the past may be a possibility on yours.