Folks my Rotax 912 F had a category 1 prop strike in December. I've checked run-out (well within limits) and am fitting another 3 blade 72" WarpDrive Prop. My old one was set at 9.5 degrees and gave good RPM static (5300). The new one is set to 6.5 and only giving me 5100 rpm.

field alt: 5300ft
Temp averages 28 decgees C

Any ideas would be very much appreciated.

Best
Zeke