I'm using a Mark-X pump, I bought it used with a flight box, 12 years ago!! It did quit pumping once, I took it apart to see what went wrong?? Turned out to be a big hunk of crud inside the fuel filter on the end of the fuel line in my can. A lot of electrics like to have a little positive pressure inside the can on the first pump of the day. I have a fuel line I use and just blow pressure into the can then it's fine the rest of the day. One of my old students gives his fuel can a squeeze the first shot of the day and everything is fine.
There isn't much to go wrong with a pump weather hand crank or electric, nothing in there except an impeller. The hand cranks don't really care if you use glow fuel or gas either.