pump prime
I've had problems on a couple occasions getting the shurflo to prime. It appears that if an air bubble of the right size, gets in just the right place, the pump can airlock, seems as if the pump cycles, and all it does is stretch and compress the bubble or something like that.
Try to pressurize the inlet a bit, somehow. If you have a rubber hose on the intake side of the surflo, try squeezing it rapidly a couple times while the pump is running. If your pump is doing the same as mine did, its running at full speed and does not seem to move any water to speak of.
When I squeezed the inlet line while the pump was running all of a sudden it changed from full speed no load to the normal slower stroke rate that quickly slows and stops as the pump comes up to pressure.
Supposedly they can be run dry with no harm but I know the pump gets quite warm running at full speed no load.
Larry
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