ORIGINAL: wingstrut

I use the standard gear drive hand pump to fuel up my airplane, the problem is that it takes 138 full revolutions to fill my 40 ounce tank.
I'm not lazy but this seems ridiculous, I don't want an electric pump, just another battery to maintain.
Does anyone have experience with the Six Shooter, they claim 6 ounces with one complete turn of the handle.
I'm pumping gasoline, any suggestions would greatly be appreciated.

Maybe my gear pump is worn out, my flying buddy has a gear pump and it takes him 90 turns to fill his tank, which makes me to believe that they are low volume pumps.

I appreciate your time, Sincerely, Ron