We have a 2020 Bennington with a Yamaha 150 hp outboard motor and absolutely love it! Last summer we experienced a very high pitch screeching noise when going from forward gear back into neutral. The maddening part is that is doesn't happen consistently. Some days nothing, other days, there it is. It seems to happen when we've run the boat for a bit and the engine has warmed up well. It feels like the motor is not fully disengaging when going into neutral. I'm new to all of this. Took the boat this winter to a reputable, local boat mechanic, and of course he couldn't get the sound to occur. Wondering if anyone has experienced this before, and could maybe provide some advice? Thanks for any help at all-