Took the Husqvarna trimmer apart an hour ago. I found nothing that needed tightening. The machine looks almost new. I added some straight gas to the mixed to thin it down a bit......... along with some seafoam as suggested.
It does indeed run better with the choke half on as described by the wife. And I noted that while at idle ......... and I pull the choke lever ....... it acts almost as a throttle control. The machine revs up ........ I guess I'll need to tear it down again.