Did an autopsy of the crappy Mallory pump (3rd one I've had go bad on me). The official result: Sat too long with moisture in the pump. Electric motor wasn't sealed well enough. Pump siezed, motor fried, primary power wire melted.
Here's the pump in question. Dead on the examining table.
First I will remove the pump cover. Warning, this will void the warrenty...
Evidence of galling and heat build-up.
Ah-ha, rusty and frozen.
Now, I will take the top cover off and look at the motor.
Rusty, grungy, a little bit on the toasty/fried side of things.
This little guy has melted and burned almost all the way through.
Motor windings are also rusty and grungy.
A collection of some substance in the base of the electric motor. It and the pump and siezed so badly that I couldn't seperate them with a hammer.
So, first two dead pumps were because they suck. This one is mostly my fault, but really...it should have survived a few years without use. Oh well, the Aeromotive pump is light years better.