So I have an 07 LSV and since owning the boat, but more recently, I have noticed a lot of vibration / grinding noise while surfing or pulling hard. I opened the engine compartment and it smells very gassy/oily/worked hard. I also noticed what almost sounded like a high pitch whistle noise while getting into the throttle. That noise almost sounds like a vacuum leak or like the engine is starving for air but I know its not.

I am worried about the Vdrive and transmission on the boat as well as the engine. The oil pressure is good and the engine never gets hot. I didnt know if anyone else heard that grinding / vibration while surfing their LSV. Hopefully someone can give me a little insight as to whats going on.