Help 2024 Yamaha 255XE engine/thrust broken???

[Mr.Magoo34]

Ok, I am a new owner of a 2024 Yamaha 255XE, and I have put about 7 hours on the boat. Two things have happened. First, after tubing for a few hours with my family and everything running fine, I found the port side engine covered in oil while docking into my wet slip. The certified dealer who sold me the boat cleaned it up and could not find any oil leaks, and it ran fine with them. I took the boat back and ran it for 15 minutes back to the slip. As I was docking in reverse, the thrust was off a bit, and the boat moved poorly, but I was able to get it home. The engine seemed fine at very low RPM.

A few days later as we made our way out of the harbour and got to speed, the port side engine made a terrible noise past 2000 RPM and provided little thrust. At 4000-5000 RPM, the entire boat shakes, and it sounds like the whole engine is going to shake off. The starboard side engine is fine.

Clearly, something is broken in the port side engine. Nothing in the clean-out port, both are clear.

The dealer is working on it now, but they do not seem to know what is happening. They claim they want to replace the control box at the helm but I do not understand why that would be an issue. But I am not a mechanic.

I feel like I bought a lemon.

Any thoughts to help, or has anyone else had this issue?