You can see the dings and jagged edges in the picture I posted. they look small but causes lots of cavitation. It doesn't take much; any amount of cavitation coming through the pump will cause serious performance issues- and ANY damage to the impeller will cause cavitation and loss in performance. i consider this impeller trash... Like mentioned above, you can't just bend the impeller back to a "close enough" shape. your impeller is trash. the price to have it reworked isn't much less than a new impeller. i picked up that polished 13/18 from SBT for $160. i didnt waste time trying to clean this impeller up. On another note, a lot of people look through the rear pump and see not much gap between the impeller and ring, but if you check behind the impeller, it's a much different story. as you can see in my pics- the front of the ring is worn way more than the back. a 1/32 gap will cause performance issues. my new impeller literally touches the new steel ring. do whatever you want- it's your ski, but this lessen will eventually end with you replacing the impeller & ring.
