No! 1) turn off the pump. 2) open a faucet or two and take the system pressure down to zero, or close to it; basically when no more water comes out the faucet(s).3) Turn the faucets off. First remove the intake hose from the pump and fill it with water, elevating the end as much as possible to release the maximum amount of air, then reconnect 4) open the priming cap on the pump and pour water in until it over flows (what was with the sucking?) 5) open a faucet 6) turn on the pump.
Do you have a check valve between the pump and the tank? If not, this is the main reason for losing prime. Was it run dry? Make sure you have a "run dry" type pressure switch. These are great pumps, love the one on my Hatteras.
If you have further questions the folks at Raz Marine in Fort Lauderdale are a great resource.
"There's the Right Way, the Wrong Way, and what some guy says he's gotten away with"