Any Yamaha SHO owners out there want to give me their input about these motors???

I don't own one. I hear they are great motors. If you blow the block, it cannot be rebuilt. It may be difficult to find a qualified wrench to work on it.

I don't own one but my dealership sells and services them. They are excellent reliable motors and if you service them properly per Yamaha's standards, then it will serve you well.  If you are buying the motor used or the motor on a boat used, I would strongly urge you to have a Yamaha certified dealership run downloads for existent fault codes and fault code history. Also, they should run the engine history and warranty claim history to see what has been done or if there are any outstanding service bulletins that have or have not been complied with.

There is a few guys here that have went through a couple of powerheads. The earlier ones where known to make oil. I would only own one if it had a warranty.