I notice near the exhaust port on my 026 that the piston has some brown (not black) varnish burning past the rings. On my FS81 weed trimmer it has the same but on the sides of the piston.
Here's what I'm seeing on the side of the FS81 piston (pictured):
Does this mean the rings are shot?
Here's what I'm seeing on the side of the FS81 piston (pictured):
Does this mean the rings are shot?