I had a guy fill up a Ryobi BP42 backpack leaf blower with premium fuel, not mixed fuel. I do not know how long he ran it for.
I have good compression and spark, but I cannot get it to fire up.
Any suggestions?
Pull the muffler off & check the piston & bore for scoring.
If it won't start with a little fuel down the plug hole then the engine is most likely trashed.
Very few Ryobi units can be repaired economically
