1976 inline 6 -1150<br />after changing water pumps I removed the prop. I noticed the trim tab missing and the prop looked funny while on the shaft. the only thing behind the prop was a tapered thrust washer which is 7/16" thick holding the prop out too far and this is why the trim tab is missing. I installed new trim tab and removed the thrust washer and the prop fit ok but had about 3/16" play back and forth on the shaft but it will miss the trim tab. Do they sell different thichness thrust washers. The # on this washer is 12-835467-1 and my prop is 13-1/4x17 picth. On the outside of the prop was only a retaining washer with tabs and a nut. Am I missing parts or have the wrong parts. thanks