any idea what extra noise is from?

[kingzing]

I have a 2004 150 ficht. I havent run it in a few months but think it may have been making this sound the last time I ran it. Other than sounding a little off it ran excellent. I finally just changed the impeller and lower case oil and started it up and it sound way louder than normal. I can't seem to tell where the extra noise is coming from but I think its from the power head and not the lower...

https://www.youtube.com/watch?v=hp2JFybPQpg

any ideas?

Thanks
tj

[boats.net]

Maybe a exhaust seal fell out of place when putting gearcase back on.