Gas syphoning

[thejum57]

Can you syphon gas from the filler pipe? I have a little over a 1/2 tank of 5 year old gas in tank!

[AnotherOldJeepGuy]

Don't see why not.  I know I have siphoned some before just never tried to drain the tank.  Might be difficult to get 100% out cause making the hose be at the absolute lowest spot might be difficult, but seems like you could get most of it.

[llhat]

i wanted to do this few years ago during a fuel pump failure and dang near full of gas... 

tried a piece of fuel hose ?(5/16 ID) and i could not get it down the filler neck... 
for a 'test' I took a smaller piece of hard nylon tubing that was like 1/4" and it was troublesome getting it down there... 

maybe doable, but not easy.

 

[AnotherOldJeepGuy]

I am not disputing any difficulty noted, being more difficult that it looks is very common, but it looks like a pretty straight shot from the cap to the tank...

 

[89 MJ]

If I were doing this and it’s only half a tank, I think I would pull the fuel pump and siphon it that way. 

[Big_Mark]

1 hour ago, 89 MJ said:

If I were doing this and it’s only half a tank, I think I would pull the fuel pump and siphon it that way. 

Yep this, I tried using a syphon tube (the kind with the ball bearing at the end, I don't like sipping gas, lol) and couldn't get the end past 12"-15" from the filler tube.
From the sending unit side was easy

 

[eaglescout526]

The pipes that put fuel into the tank are at a hard angle and make it tough to siphon fuel out. 
 

Better off using the pump itself to get fuel out or from the return side.