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I have always used gray plastic PVC hose barbs. A 1 1/4 inch shaft fits perfectly in a 1 1/2 inch hose barb. They have done circumnavigations, and lasted for decades of mostly full time use, with no sign of wear. They cost 89 cents to replace and are the same worldwide.
I once used one for a stern bearing on a direct drive shaft doing 2500 rpm, for several years with no sign of wear.
I once used one for a stern bearing on a direct drive shaft doing 2500 rpm, for several years with no sign of wear.
