I test started mine this summer using a "fountain pump",
sucking water out of a 5 gallon bucket. I had the prop
off. The fountain pump was plumbed to the "water intake"
using a block of wood and rubber gasket and a
Rube Goldberg affair to clamp it on.
It did work, but I had a hard time getting a good
seal, so I only ran it a couple of minutes.
It had potential, but a better design needed!