I have a Baha with a 6.2 mercruiser and I have noticed when i accelerate up to cruising speed that i get what sounds like a belt squeal or harmonic squeal that lasts for about a second or two right around 3500 rpms. Has anyone else experienced this and is there a fix for this and it is something to be concerned about? It seems to go away real quick and its not like there is a hick up in the acceleration or the rpms its just that sound.