I have a Ryobi gas blower that will start but won't run. If I press the choke bulb the blower will run and once I stop pushing the bulb it will stop. The blower is about 1 year old.

2 cycle engine can clog their carbs as the gas evaporates faster than the oil mixed in. Dump you gas from the tank and mix a new batch adding a ounce of SeaFoam or other good carb cleaner. You may have to pump that bulb for a full minute or tow but this mix should help flush the carb. If not a disassembly and carb cleaning is in oredr. I hate these little carbs, they are the size of my thumb and I get to be all thumbs when trying to rebuild them.