Actually what causes those Nylatron washers to wear is the mushrooming of the actual frame rail. If you feel the slide notch where the bushing rides, you will notice that the aluminum has flared. Actually mushrooming on front and rear of that slot where the bushing travels. The bushing is fine, the aluminum is the issue. This wears those Nylatron washers as the aluminum eats into the washer. Those Nylatron washers are held in place by an aluminum stamped washer. The tension needs to allow them to travel. You may want to clean up those flared edges and this will reduce the wear on the Nylatron. It is not a problem to use occasionally, though it will increase the wear. And this is a major reason we left CMC for Slidemaster. We built a two piece bronze bushing with a lip (shoulder) on the outsides. and then used a thinner nylon washer outside of that instead of nylon. It worked very well and the shoulder contained the mushrooming, while the tension was controlled with the bushings meeting in the center. CMC did not want to follow this design. And we saw future problems increasing as the weights of engines increased. No jack plate is fail proof, though they are all improving yearly. BCB
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