You might have a couple of small rocks caught between the exhaust liner and the wall. Look at the back of the pump outlet. If you can see any small rocks caught between the exhaust liner and the outer housing, you've probably found about 90% of your problem. You can usually work them out with a pair of needlenose pliers.


Edited by alanmikkelsen (12/14/12 03:29 PM)
_________________________
Never argue with an idiot, they drag you down to their level and beat you with experience