Yeah, more likely an internal problem not an oil ratio related issue. Probably the piston rod broke. 2 cycle engines are cheap, I see them at WM for less than $100. I wouldn't buy those because of built quality. The Craftsman trimmer (USA made-found on curb side for FREE) that I resurrected from death has much better built quality than my current Ryobi trimmerI was ready for a new one so, I was still curious if I killed it or it just died a natural death. It was running great, then I heard the sound of crunching metal internally and it abruptly quit. Pulling the rope, there was zero resistance and I could pull it all the way out.