My old, old Robin NB211C weed-wacker is still hanging in there. With countless hours, it's by far my most used 2-cycle. I'd be willing to bet it has amassed over 500-600 hrs of use. Other than a plug change, its never been touched. Checked cold compression today for the first time and it came in @135psi. I've always run 50:1. Just wish my Stihl FS90 was as light. I would then probably use it. Thanks for your indulgence of this slightly off topic.