Hey 94! I ve got at 96 Eyra/175 EFI, running a 24 Tempest. As I recall, the Eyra hull seems to perform better with the Tempest. Being a 150, you probably need at 23-24 pitch prop. Rick mentioned an older predator prop for my set up, but I cant remember the specifics. Good luck.96 Eyra/12 Mercury 175 Pro XS with 2015 single axle trailer2017 Victory Gunner