The 7900 is 7-8 years old, I've re-ringed it once. I have no idea on the hours, it's one of my front line saws, but I rotate it with (2) 461 & WWS 390xpw.
I ordered a new fuel line, filter, tank vent and impulse line. Hopefully that covers the bases.
The 461 has never skipped a beat and its...