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(Trai) writes:

The pump on this
boat will work any time, for as long as I want it to run, its only
after sailing (motor off) and the boat being heeled over for a long
period that it gives trouble. After about a hour of sitting at the
slip its all ready to go again. I am stumped

Sounds like the pump is loosing its prime. The pump is not good at
pumping air.

You might try priming it manually the next time it happens to see if
that fixes it. On my boat, I would do that by pulling the intake hose
off the thru-hull, poring water down it, then reattaching it.
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