Something tossing around in my saw!

[hoodoocreek]

I've just bought an almost new husqvarna 372xp pre xtorq and i just replaced the fuel line and tank vent. After putting it all back together, and before starting it, i audibly noticed something smallish rolling around what sounds like the muffler, bar oil reservor, or inside the recoil starter, which the starter i did pull and nothing rolled out. My husqvarna 365 special very faintly, very muffled, sometimes makes the same sound, but only occasionally. What the heck could this be, and it normal? Bar reservor is empty and I've not pulled the muffler yet

 

[Bob Hedgecutter]

Video of the saw running and making the sound might help.
Could be a broken part of the muffler internally, could be the filter off the oil pick up line, or fuel filter off the fuel pick up line bouncing inside the tank. Could be clutch noise from a bad needle bearing, or worn clutch components. Could be something inside the starter cover being bounced around by the flywheel.
Worst case scenario is part of the engine internals has let go and has made it to the muffler- like part of a main bearing.