This is a great pump,it pumps with every stroke and fills my tractors fast with little effort and is very durable.

I bought this pump in haste last winter to replace a 20 year old Tuthill electric pump that had been in service refueling equipment that whole time outdoors. This pump was only used infrequently as it was at home, yet the cheezy "S" connector snapped rather quickly and I had to make my own connector to fix that. Mine was double shear... unlike their idea with the "s" that bends back and forth until failure. The number of pumps before prime kept increasing with each use until now, a little less than a year later, it is worthless. Will not prime even after you have pumped until both arms fall off. The shaft seal packing is the issue. Bubbles can be seen around the packing. If you ever did get it primed, fuel would leak around that shaft as others have pointed out. I just ordered another tuthill hand pump identical to the one that has been on our 2000gal tank for over 30 YEARS! Buy something ELSE.