2017 225 SHO on a Phoenix 919, 50 hours on engine. 10" manual JP, PTP 2 5/16". Engine data cable with digital tach. VMax SHO 25 T1 prop. Could only get 5750 max rpm's in cool weather so I sent prop off to Mark Croxton for evaluation, B&B. Prop returned and I'm still low at 5850 max. How do I make sure my Hot foot throttle is maxing out?