Do my motors sound normal?

[Lth101]

First time jet boat owner here. Just bought a 2011 Yamaha 242 LS with 259 hrs on it. Boat was surveyed, sea trial hit 51 mph and compression/oil on both motors were good. Didn’t notice any weird sounds in the water. When I ran the boat out of the water on my hose I noticed it was pretty noisy and one motor was more noisy than the other. Do they sound normal or am I in trouble?

https://youtube.com/shorts/V8mOMCpgSVo? ... CPcdZjhQ67
https://youtube.com/shorts/jrOMVK4fI7Q? ... rDs_6h_Eq7

 

[David Martin]

Starboard engine is running a little rough most will replace plugs and make sure gaps are correct but on any boat of age I would also suspect fuel injector spray not giving a good clean spray pattern. This will show up on plug read/inspection.....as long are you have a good amount hours on the plugs.

I inspect mine every 50 hours or so.

 

[Cleveland Steamer]

Those sound and shake just like mine. Seems normal to me.