My H240 has four stainless machine screws that pass through the tiller head and thread into the square aluminum end of the tiller. The front two screws are tight but the rear ones are loose and can not be tightened. My choice is to retread with a larger tap, add new screws or, drill through the width of the tiller end and push a stainless bolt completely through. I will probably do the latter. Has anyone else dealt with this?