Blue Streak

Hope someone can help me with this. I have a 16 1/2 ft Pro Craft with a 115 HP motor on it. But because we have good fishing waters in this area that are restricted to 10 HP only, I also have a 10 on it for the small waters. This 10 is souped up to a 15. I need to replace the prop on the 10 and of course I am looking for the best performance I can get out of it. I have been running the standard prop that came with the motor and it is a 3 blade. Other than that I don't know a lot about it other than it may be a 10 inch diameter. Someone told me I should go to a smaller diameter to get more rpm. I am really lost on this one, I mean I understand I can't expect a lot out of a small motor pushing a heavy bass boat but I would like to do a little better. Any suggestions at all would be appreciated.

Another vote for Fenwick, I really like the Tecna AV's.

I am another one of the old guys who has been using these techniques for many years we just never had a name for them.