Always re check mechanics work!

[stzomah]

to bcroe: I suggest that after taking down your gas tank on a transmission jack, you remove the sending unit and then siphon the gas out into containers from that hole.  Depending on the year of your car, you may also be able to siphon some out through the filler pipe before removing the tank from the car, which would make the tank lighter and easier to deal with when on the transmission jack.
   

I have the MITYVAC 7201.  It's one of the best things I every bought.  Makes oil changes fun!.  I use it on my 56 to drain the filter housing.  Still drop oil in that using the plug!  My other cars, I never get on the ground!  BACK TO TOPIC...

I used it for oil and tranny fluid and I would suppose gasoline is fine too (reviewer said he used it for gasoline).  Just be cautious to do it in a ventilated area away from ignition sources.

I tried to siphon using a hose and my mouth when I was a kid....  I'll never forget getting gasoline in my mouth.  Young and dumb!

https://www.amazon.com/Mityvac-7201-Fluid-Evacuator-Plus/dp/B0002SR7TC/ref=sr_1_1?ie=UTF8&qid=1496762333&sr=8-1&keywords=mityvac+7201

review here:
http://www.thetruthaboutcars.com/2009/09/im-gonna-get-you-sucka-product-review-mityvac-7201-fluid-evacuator-plus/