What is this hose for

[darius823]

Should it be connected to something

[lupo76]

Overflow hose.

[darius823]

Jun 28, 2019 7:18:18 GMT -5 lupo76 said:

Overflow hose.

Should it be connected to something

[pinkscoot]

No, it's where the gas goes if your bowl overflow.

[darius823]

Jun 28, 2019 7:52:17 GMT -5 pinkscoot said:

No, it's where the gas goes if your bowl overflow.

Thanks alot

[ThaiGyro]

In my experience...that is what is commonly called a vacuum port. In older days called reference air port, referring to atmospheric pressure. It allows air in when piston moves upward, and pushes air out when the piston moves down.

If you look, it is above the venturi, meaning it is not likely a float bowl vent. It simply allows the diaphragm to move easily as the CV piston opens or closes. Supposed to improve response. Not a CV carb fan...saw too many in the 70's and early 80's.

Like this:



The short answer is to simply leave it alone. It is a vent that should remain up high so water and dust down't interfere. You can inspect and keep it clean!

[GrumpyUnk]

It is the vent for the float bowl. It allows air pressure in to replace any fuel drawn from the bowl that has not been replaced yet by the needle valve. If the level gets too high, fuel will flow out the intake(air cleaner)side and trickle into the air cleaner, thence to the floor.
Without the vent, when fuel was drawn into the venturi, main jet, idle jet, or ???, there would be a vacuum developed in the float bowl, which would deter fuel flow. Again, until the float dropped, opened the needle valve, an refilled the bowl.
tom

[FrankenMech]

Fuel bowl vent like Tom says.

I remember the CV carbs from the EPA in the 70's also, -pure crap from the days before electronics. The cars were a pit of snakes (hoses) and almost unrepairable.