Ran many a flojet for years and a couple dele's.
Had uhaul wire up with fuse to a commecial 5prong at my rear bumper.
Pumps were always mounted upside down (use plastic zip ties) on railing of trailer. I have ran thousands of gallons of juice this way with no problems.
We dubbed the term "dooshing" the pump out when it loses its prime or sucks up something. Just use a garden hose at your feed line and open her up and push it through.
good luck
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