Petrol lawn mower rotary mower motor mower series mcculloch m51 cutting width 51 cm min cutting height 30 mm max cutting height 90 mm cutting height steps 5 positions rotational speed 2 800 rpm engine make briggs stratton engine model b s series 500 e displacement 140 cc engine type ohv cylinder 1 engine cycles 4 stroke tank capacity 08 litres discharge rear discharge grass box capacity 64 litres front wheel diameter 203 mm rear wheel di