Has this pump worked at all -pumped water?
When it's running for about a minute, is it pumping water?
Is this a self priming pump or do you need to prime it?
I think Polaris should refund the purchase price on these pumps. I changed the breaker, the whip, and upgraded the outlet (using 110). The dealer exchanged it for me, but would not give me a refund, and I had the same issue with the second motor. I used a Hayward 6060 pump as a replacement. Everything works fine.
