Why doesn't my weedeater have top end power but it has bottom end power and a idle. It bogs down when you try to pin the gas with the choke off. But with the choke on it runs like a champ

Hi,
If it is the WeedEater brand and has a walbro carb, then it is likely it has a partially clogged inlet screen. For an unknown reason this screen was specified for this brand and is prone to clogging. The Walbro part #140-70 will replace it.
Peace,
Clarke