Pretty sure you should be running a Skat impeller in your Skat pump on that RXX. I'd talk to them as they supplied those goods to Doo. I assume the solas doesn't fit properly.
I ordered it as a spare. Skat has the pump and orig impeller currently, they also didn't know if it would fit or not. I can't find the sa part of the model number anywhere but on ebay. Its not on the solas website but if its nos (like is supposedly is) it may work guess I will have to wait for my pump to get back from skat
I also didn't see a SA. A quick google of the Solas SA-CD-15/21 RXX will get you some answers, you'll find it. Supposedly the one you ordered was for a stock doo pump, not a Skat--supposedly.
Pump is 148. After looking through about 200 pages I went to solas's Japanese site and saw it listed under the rxx along with the kg cd part numbers funny couldn't find any other solid information on it but the ski is 13 years old. Thanks for the help guy's.