Weird Noise Jhonson 9.9 2 stroke

[Mastermuffin]

Hey everyone, i have a weird intermittent noise coming from my 2005 Johnson 2 stroke. I'm worried it could be internal, i took it out today and it ran fine other than the noise and at high rpm it seemed to struggle maintaining its power, it would rev up and down at max throttle.

here is a video of the noise

https://www.youtube.com/watch?v=hxRFI7aEYag