Ryobi BP42 backpack blower
Model: RY08420A
This came in over the weekend with the owner reporting that it was running fine, stopped abruptly and then wouldn't start. While I was diagnosing it, it would sputter a bit at low RPM and stall but would never catch on and run. Spark was good so I pulled the carb and peeked into the intake. I took a photo of the cylinder wall from there with the borescope. I noticed that when I pulled the rope slowly, as the piston went up to compress, I saw fuel oozing past the piston. I can easily hold my finger over the spark plug hole while pulling it over. With a compression tester, I got a reading of 85-90 psi. I read it needs 150 but I don't know what the minimum is to at least run.
I haven't gotten a look at many cylinders in my short career but this looks pretty bad to me. I know I have spark and I know there's fuel so I'm assuming the cylinder/piston are the problem?