Mr Comet
Well-known member
About two weeks ago I replaced my sending unit right after I ran out of gas. After changing out the sending unit for a new one I first returned about four gallons of gas. I am using an electric pump which in fitting is mounted about 4" from the outlet of the tank. Lower than the outlet fitting of the sending unit. When I attempted to pump the fuel out nothing was drawn from the tank. So I ran a 5/16" fuel line from the pump in fitting to a gas can mostly filled with gas. The results was every thing from the pump to he carburetor worked just as they were suppose to. over a couple of days I continued to fill the tank by gas can. Pump did not work. Today as I filled the tank with more gas from a gas can as I put in about 1.4 gal. about half the can, gas started leaking out the outlet spout of the tank (probably filled up to highest point of the tube of the sending unit). I reattach the 4" line to sending unit outlet and pump inlet, put another 1.4 gal. gas into tank. Tried the pump and no draw. Any ideas what I should try? Perhaps another 2.5 gal gas? some point all the air in tube of sending unit should be replaced with fuel right. Oh vacuum line is clear and cap is on.