ORIGINAL: fritzdecat
I used lawn boy at 32:1 at breakin and then stuck with it. The engine runs fine this way and is better off.
You will find it runs a bit hot and this helps it.
The engine needs at least a 30-grade oil, or 10 cst at 100C.
Lawnboy is a very thin oil specified at 165 SUS (saybolt), which is about a 15 grade oil. Waaaay too thin for the 26cc engine.