We have a 1991 Rinker 260 Fiesta Vee. It has a Mercruiser 454 (7.4 L) and a Bravo One outdrive. Up until recently the boat did 40 mph at WOTM at the proper RPM, don't remember off hand what the RPM was.
Now the boat goes about 33 mph at full throttle and the RPMs are lower. We changed the...