I understand that I dont need to expect alot out of my PII and the 175 Opti.. I did raise the JP and helped some, will work with that before trying another prop.. I believe the Predator props are small hubs, were used on a 94 Merc EFI. I tried them on the Opti, didnt do well..Royce 1994 PII, 2007 175 Optimax