Quote Originally Posted by Poconos View Post
Can't really think of anything to help but can you tell if there is any air getting into the pump basket? Also, can you tell if the motor is up to speed when the shaking occurs? The shaking is strange.
Al
It is probably an air issue. If I start in low speed and then click to high speed it purrs...but most times when I start it in high speed it will sound like it is struggling badly. I do notice that several time when I then restarted it I get a huge amount of tiny bubbles out of the return line. Probably air. I guess starting in slow speed is a subtle way of priming it?