Last year my booster pump wouldn't come on at the first of the season (hummed for a bit then tripped the circuit). Thinking the impeller was clogged as the result of a torn filter last year I took the pump apart to find it wasn't clogged but it wouldn't turn either. With a little encouragement from a pipe wrench (probably not the best idea) it started turning so I put it together and it worked fine the rest of this season.
Fast forward to this season and same deal. The old pipe wrench worked last year, so why not give it another try. The pump freed up, I put it back together and it ran fine (OK it was a bit loud) for about half an hour before it locked up.
My thought is that the pump should turn with less effort so the starting capacitor may not be the problem, that and the fact that I had it running then it quit.
Any suggestions on where to start?