My little tiller is a Honda 4-cycle. Probably the Mantis still uses the Honda engine, so I imagine that they are much the same.
I didn't get it out of the garage this season but that's mostly the tractor guy's fault. If he would stay on my paths and just till my beds, I wouldn't need to move so much ground back on the beds with a shovel. First goes down the fertilizer. Once the shovel work is done, there is no important need for the little tiller.
Yes, I used it for the loose soil in the 4' beds to mix in the fertilizer. Honestly, 3' would have been easier with me staying in the paths and just circling the beds a couple of times. Walking backwards and pulling the tiller leaves a better seedbed.
Anyway, it is completely useless to kill weeds in the paths. The amount of rock in the soil means the little thing just skips along! And, it needs to follow the tractor tiller or my walk-behind or the spading fork. I'd hate to have to rely on little tiller from the get-go.
Steve