Hey,
My RIB has been under cover for about 5 months, and got it up and running today... and I'm not sure if it's 'sounds' right...
http://rbwebdev.co.nz/o1.mp4
I know this is a long shot, and quite hard to tell from a rubbish sound recording from my phone, but does it sound a little jumpy?
It's got muffs on and the prop is partially (about half) submerged.
It's a Mercury 60HP 2 Stroke...
Thanks!