cut it off and absolutely refuses to restart,until.... (long)

The motor was warm, but it never stalled. I shut it off manually both of these times, and both times I tried to start it back up within one minute. The only reason I was thinking of the pump was like I stated previously, when it wouldn't start, I would turn the key and did not hear the pump priming itself. It's wierd because it's only happenned twice so far and the two times have been months apart.