In my experience, forget the expensive pullers and fancy lubricants. When installing the impeller coat the splines , liberally with water proof grease , such as NEVER SEIZE, get it at any auto store. As suggested use a wire tie to compress the blades or a hose clamp. Coat the blades with plain old liquid soap or detergent and slip it in. Makes clean up down right --- clean. Pull the impeller with a small pair of needle nose VISE GRIPS. This method has worked for me for a little over 35 yrs. YMMV CCC Lying Beaufort, NC at anchor. M/V CC RIDER SUPPORT OUR TROOPS Charles C. Jr. and Pat Culotta Patterson, La http://www.geocities.com/charlesculotta/