I've got an '01 Mobius V and have a weird vibration when turning to the right at speed and under a load, either with ballast filled making a turnaround or pulling a few kids on a (dreadful) tube. It almost feels like the transmission wants to slip, like it starts to give, but it never actually does.

Last summer the local deal went through it from bow to stern and didn't find anything wrong. This year I've found the same vibration/whirring sound when turning to the right, again only at speed with a load. A friend was telling me this is probably prop wash but I'm having a hard time believing that. The boat only has 200 hours, is always serviced and is in immaculate condition.

Anyone have any ideas what might be causing me the problems? Other than the right turn vibration thing it runs perfect straight line and left turns are nothing.