I cant seem to run anything over 5800 RPM's i have a Blazer 202 and im running a 27 Pitch T1 prop. The guy i bought the boat from says he has run this motor at 6100 many times. He also said just before i bought it that Yamaha had a recall on the oil injectors in which he had worked on. Could this recall have affected the RPM's or what else could be the problem with me gettin higher RPM's????