2006 90 hp 2 stroke factory jet

[jetsled]

First merc outboard jet, seems to have a bit of a rattle at idle. Runs great otherwise. Can't find anything loose, sounds a bit like a washer rattling, any ideas?

[boats.net]

Can you tell if it's coming from engine or jet drive?

[jetsled]

Should of mentioned it earlier, sorry.

Seems to my untrained ear it is from the lower portion of the shaft rather than the head. So, if my options are motor or jet, I'm going to say the jet.

[jetsled]

No reply?

I'm new to this forum but I'll take the no reply to my last post to suggest that the problem is most likely in the jet unit and I should be looking to tighten the shim nut holding the impeller ?