I recently got a march 809, and have had some trouble getting it to prime up. It is probably a foot below my vessels and has a ball valve on the outflow side. I have tried turning it all directions, and putting it in different spots on my rig, sometimes it takes off like a rocket and others it struggles to start moving. I am scared of burning it up by running it dry. My hoses are sillicon and might be a little long, in other words, I left lots of slack so I could move the pump to best spot. Any help would be appreciated as usual. I am very new to the march pump, and haven't even brewed with it yet, so far have only done wet tests...thanks wnc