WELCOME TO THE DREADED NORTHSTAR..THEY FAILED TO PUT A LOCKING SCREW ON THE IMPELLERS ON THESE WITH A MOTOR THAT CAN RUN IN REVERSE ON A WHIM . SO WHAT ITS DONE IS MUCKED UP THE THREADS ON THE IMPELLER.. YOU WILL FIND THAT THIS IS THE HARDEST PUMP TO WORK ON ! PARTS $$$ CRAZY .. I SEE A NEW PUMP IN YOUR FUTURE ,, A STA-RITE DURA GLASS !....; WHEN GETTING A NEW PUMP TELL THE THE HP AND SF SERVICE FACTOR OF THE HAYWARD YOU HAVE SO YOU GET THE RIGHT SIZE PUMP FOR YOUR NEEDS ..GOOD LUCK AND VOTE FOR ME...JAY

My Hayward Northstar pump all of the suddem seems to not run correct and them trips the breaker?? I just put a new impeller and diffuser two weeks ago and it has been running great.