i bought a 1997 17 ft sundance w/ 90 hp tahutsu motor tank was at 3/4 and ran boat and it was great, than i added gas and motor wouldnt rev past 2900 rpms, sometimes it would plane and ran great even when i down throttled it would run fine and plane again, but the next day it would not get over 2900 rpms for a long time and then would catch again and run fine. should i run to near empty and get another marina to get gas. my mechanic cleaned carbs and said there was a little moisture and some dirt. should i change fuel filter.