wvmarle:
It's the distance between the centre of the axle of the motor (the pivot point), and the point at where the force is needed (the point where your motor's arm connects to the thing you want to move).
Ok. That makes more sense.
Ive been talking about the arm of the mower. Not the motor. That's why it didn't make any sense to me.
The motor wouldnt be placed at the center of that pivot in the pic. Although, if i did it would solve some linear motion issues. So maybe ill take a look at it and see if i can.