Looking at the power tech srt prop for a Yamaha 15hp... So if I were switching from aluminum to a stainless prop like the srt would I need to drop down one or two pitches?? I have a 9x10 running 5720 wot rpm... So would I go with 9x9 or 9x8??? I plan on running an aluminum 9x9 today but not sure it'll work if I need to drop down 2 pitch sizes since power tech only goes down to 8 pitch... Thanks in advance
