Air in fuel line to gas tank

[jmendiola]

I am hoping someone here can help me out. My tank is not full and the last couple of time i have tried to put fuel in it begins to overflow. I was told that it is probably air in the line. Does anyone know how to remove this air from the line or possible what may be wrong with it. Thank you

[Cracker Larry]

Your vent line is probably clogged, not letting air out as fuel enters. I don't know your location, but here in GA my first suspect would be a dirt dauber nest in the vent fitting or vent hose. These little mud wasp will plug up anything they can crawl into. Even the pee tubes on the engines. I doubt it is air in the line causing the problem.

Remove the vent hose from the fitting and try to blow through it to the tank, and make sure the fitting is clear. If not, a piece of clothes hanger wire will ream it out. Try to keep the dirt out of the tank.

Edited February 5, 2010 by Cracker Larry

[Capt Rick Hiott]

If there is any trash or water in the vent line you will blow it in the tank if you blow in the vent hose.

Blow in the intake filler hose that goes to the tank and try to push it out that way. If you can get to it, remove the vent hose from the side of the boat before you try to blow the trash out. (If that's whats wrong with it)

Have you changed the gas station that you go to? I have seen it where if the grade of the ground (Angle)it could stop it from going in the tank. My Sea-Pro does it

Edited February 5, 2010 by Capt Rick Hiott

[reel dawg]

My guess is that the problem is "airlock" in the fill line. If the fuel goes in too fast, the tank can't take it in that fast and the fuel belches back up at you. I have that problem with my boat and dealt with it by putting gas in 5 gallon cans at the station and then putting the cans on the gunwale and siphoning the fuel from the cans into the tank. The fuel goes in at a slow rate and the problem is solved. A real PITA, but I love the boat anyway!

[jmendiola]

going to have to try and give all of these a shot. thank you all for your quick replies. i will let you know how it goes.

[Cracker Larry]

My guess is that the problem is "airlock" in the fill line

That is usually caused by the way the hose is routed in manufacturing. Since the problem just appeared I'm still betting on a clogged vent

If there is any trash or water in the vent line you will blow it in the tank if you blow in the vent hose.

Rick, good point. Better advice would be to disconnect the vent hose from the tank fitting, and blow it in the opposite direction

You aren't going to blow a dirt dauber nest down the line anyway, my test was just to see if it is clogged or clear

[Capt Rick Hiott]

Your right Larry (Better advice would be to disconnect the vent hose from the tank fitting, and blow it in the opposite direction) But most of the time ya cant get to it, ya know.

[welder]

OR, the tank is full and the sending unit is not working.

While yor putting gas in , can you feel air coming out the vent. If no air out the vent , she is plugged.