Just took delivery of my boat with pair 2004 f225 100hrs. boat ran great saturday, wot 5500+-. both in line filters and new raycors have been installed prior.went out sunday, boat runs great, up to 4500 rpms, as throttle is increased past this point, starboard motor boggs and doesnt spin up, back throtte to 3500 to 4500, runs great. could this be a clogged vst filter or something more intense, any help appreciated since this is my 1st experience with 4 strokes.