Picked up a used 19p alum. prop a couple weeks ago and ran great. 4300rpm wot & 36 mph in slight chop in a short run, engine sounded happy.
Bad news- got home checked prop and found a 1" crack in a blade oh well I guess the rompin stompin fire breathing 470 was more than it could stand lolol!!
Watching a couple of Merc. MIRAGE props on e-bay now. Just wondering about any advantage of the PLUS vs standard Mirage?

the plus has a little more slip than the standard Mirage and has cavitation holes to let it slip more from a stand still. The original Mirage will bog an outboard, where as a Mirage plus works fine on an outboard(thats the whole reason they came out with the Mirage plus)). From the specs you posted using an aluminum prop, I'd say you need a 17P Mirage,

Thanks Spare....Now on the hunt for a 17p Mirage.

And my 2 cents ain't worth a penney, but I'd make that Mirage 17 a LARGE diameter too...my Honda 150 spun a Mirage Plus 17p x 15.5" dia all the way up to the max 6,000 rpms w/no problem...I KNOW yours can use it...