Here's the directions for a gasoline job.
To protect the pump from damage caused by mineral
deposits or freezing, use PumpSaver to treat pump. This
prevents freeze damage and lubricates pistons and seals.

SNIPPED FOR BREVITYNOTE:

If PumpSaver is not available, draw RV antifreeze
(non-alcohol) into the pump by pouring the solution into a
3-foot section of garden hose connected to inlet adapter
and pulling recoil handle twice.

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OK, how do you turn an electric model over about two revolutions???