I have several Weed Whackers

The ones I liked the best for torque and low end power were the McCulluch 32's with the straight shaft but the throttle cables tend to break in the MCullochs. I've also had two that the crank pin came out of the counterweight.

I've got a couple Ryobi's that I've never had any trouble with.

The Homelites didn't give any trouble

The Weed Eater brand 21's were more of a little toy job and no a real entity as far as a weed whacker goes

all these are now obsolete types and no longer available as I have them