I have an RPM question/request for opinion. Does anyone have an opinion or data based position on maximum sustained operating RPM? I was able to maintain about 25 knots while operating at about 3500 RPM. With the unusually warm weather this summer, everyone has been having issues with growth on the hull. I pulled mine in August and had the hull power washed, which improved efficiency, but I’m finding I need to run the engines at about 3850-3900 (and occasionally a bit over 4K) now to maintain 25 knots. My typical time spent at this speed has been about 30-45 min sustained. With no red line on the tacs, I don’t have a good feel for how high is too high. I do know the “feel” of the boat operating at ~3900 is comfortable. Thoughts?