just purchased new 2020 mercury 250 pro xs 4s. installed on a 2011 z520 ranger. 6.3 hours on motor and cannot exceed 5000 rpms is this correct? adjusted hydraulic backplate up and down trim up and down will not exceed 5000 rpms or exceed 50mph. i know should only be in spurts in broken period but shouldn't it exceed 50 mph and 5000rpms? thanks for any input