Ah yes you're correct. I use 1 minute as my personal limit so I don't grow accustomed to running it too hard for too long, but the operator's manual indeed stat

Ah yes you're correct. I use 1 minute as my personal limit so I don't grow accustomed to running it too hard for too long, but the operator's manual indeed states 5 minutes above 5500. I have a fixed pitch prop, which means I typically can only spin the prop at those speeds during cruise anyhow.