there should be a belt tensioner under there ( its a pulley that isnt hooked to motor or blade axle) it will have a spring putting pressure on it towards the belt. take a wrench of correct size to the bolt holding that pulley on and turn it in the direction away from the belt.
there should be a belt tensioner under there ( its a pulley that isnt hooked to motor or blade axle) it will have a spring putting pressure on it towards the belt. take a wrench of correct size to the bolt holding that pulley on and turn it in the direction away from the belt.