I have an early 2000's Mercruiser Bravo drive mated to the 6.2 MPI engine. I just purchased this boat, it has a Mercury propeller and the/a hub shock absorber with 9 equally spaced recesses for a tab lock washer to mate with. The current washer has 6 symmetric tabs and is obviously not right, as only one or 2 of the tabs line up, and don't allow the locknut to be torqued. What is the correct lock washer? Thanks.?