Im not sure about 80HP outboards in specific, however, my family and some friends have Yamaha outboards and they are fantastic. The only problem we have remotely had was it started "peeing" slowly. All we needed to do was use a toothpick (a very expensive and advanced tool) to poke whatever was blocking the exit clear. It is the High Trust 60HP engine and has over 400 hours on it. A friend has a 90HP model and it is even quieter. I can prove as a testament to their low noise levels. We sneak these pontoons out nightly without an issue. You can not tell they are running at idle. I can not compare to the Honda 50HP, though. But I have driven a JC with a Honda 150HP which was quiet, and potent as well. I do NOT like Johnson, Evinrude, or Mercs. This is based on past experience, and we will never go back.