We all know that changing the raw water impeller on the outboard side is a real pain. Part of the problem is the short throw of the wrench to turn the 1 1/8" bolt that pulls the impeller. I found on Home Depot's web site a 1 1/8" wrench with a wrachet on the closed end for only $22 (most I've looked at have been in the $70 range). This has to save a bunch of time. You may want to look into it.