Should be ok but check with Solas first. We bought it at Ribex last year and they said it was the one for Yams over 100hp.
Two Stroke/Four Stroke ???
If it is ok it should bring the revs down in the right range. We swapped the ally props supplied on our F115s which were revving to high for yamaha stainless ones and this brought the rev range down without altering the pitch.