Looking at getting a stainless steel prop for a 2020 Yamaha 15 HP... War eagle 542fld with mini jack plate.. current prop is a turning point hustler 9x10 @ 5720 wot and close to 23mph. Im looking at a power tech srt but not sure if I need to drop down one or two pitch sizes... I had the 9x10 all the way up at was able to gain another 100 rpms but had to feather it to not vent... So hoping with a SS I'll be able to bump it back up a bit... Thanks in advance...