yeah the problem with the electricpumps is that the immediate torque from teh motor sheers off the pump drive on the motor shaft. this isbecause the fuel evaporates and leave luibe oil behind which makes the pumps gears stick. turnthe pump motor on and snap it sheers off.

You can repair but it will sheer off again. I just use a hand crank pump now. easier more reliable and delivers enough fuel per revokution to fuel up in less than a minute in a 12oz tank.

if you could replace the pump drive unit on the end of the motor shaft with something permanently attached then it would be fine.
alternatively find yourself a automobile window washer pump and use that to drive the pupm unit. they are far more robust.