Re: merc. prop ??
To add a little more info. The diameter of the V6 prop exactly matches the OD of the inline six gearcase. It will not recess into the gearcase, as you want it to do. With the correct spacer on top of the thrust hub, you could probably run it. I messed around with that notion one time, since I had a nice Rapture prop off my Alpha 1 OD, and wanted to run it on my Merc 1500. I blew up the 1500(rod issue, not a prop issue), so it became mute.