Anyone running a Tempest prop on a 250 HOI just talked to a guy telling me his 2011 Z521 250 HO runs best with a 27p Tempest with 1 plug out. I have the exact same boat, anyone have any opinion on this. I currently run a 26p Raker HO that I have been happy with, but am looking for a spare prop/hub kit and seems like a decent price. He also has a 26p Raker and a 25p Raker II available.