This is an old post which I initiated but can share a couple of things to address comments or questions that members have posted. According to Torresen's Marina, you can still get the 6-blade impeller but it is about 4 times the cost of the 12-blade replacement impeller. Both fit the pump which I believe (mine anyway) is a Shurwood (sp). When I bought the boat and changed out the impeller the first time, it was a 6-blade. Because the blades were bigger, I found all of the rubber pieces still inside the pump housing with one piece lodged in the port heading to the engine. Since Torresens did not stock the 6-blade, they looked thru their catalogues and sold me two 12-blades (one for a spare) saying that the 12-blade was the suggested replacement unit. The only problem I found this year is that when I went to change the impeller, I could not retrieve all of the rubber pieces as with the blades being smaller, I think they were lost through the port and into the heat exchanger. There were only a few small pieces missing so I'm not going to dismantle and clean my heat exchanger quite yet. But my concern is that with the 12-blade impeller, I'm always going to have this problem and will have to be more precautionary, changing out my impeller more often.
_________________ Mark Celtic Lady, Hull #315 Muskegon, MI
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