I don't think the YS will handel more then the 15", and that would be keeping the pitch at around 7. I tried a 15x8 on one of my motors, but it got hot. The motor is brand new so I wasn't expecting a lot from it. Once properly broken in, the YS may Handel a 15" prop. Definitely not a 16"r.
Have you decided on which scheme you are doing?
I may go with either "Chow Hound" or "Little Patches".

-Mustang51