I have a Ryobi model 764F grass trimmer. I have had it for 15+ years, always started little or no trouble. Then it became hard to start and now it won't run. However, if i trime it it will run until the gas is gone.
I am guessing the carb needs an overhaul or replacement.HELP. And yes, it is a model 764 F as in Frank.

mike conway, April 2009