I have a Vexus AVX 1880 with a Pro XS 115 Command Thrust (SN:2B565959) running a
Tempest + 23 pitch prop on a 6" Slidemaster manual jackplate. I have played around with my jackplate height and am happy with the performance thus far, 50 mph gps at 6250 rpms (Merc VesselView). Does it hurt to run these new 4 strokes at near max rpms for extended periods? I can hang around 40 mph at 5000 rpms.