Posted September 04, 2022Updated September 04, 2022. and my OMC mechanic says it will work fine. I didn't want to risk that this yearI have a 1997 Evinrude 15hp. Didn't want to take any chances this year but after comparing to the OEM impeller this seems good for a fraction of the cost.ProsInner Shaft Insert Diameter: 12.74mmCons0 0 0 0