... cutting concrete,asphalt,cement,stone,marble etc 1)Engine:1E50F,air cooling,2-stroke 2)Displacement: ... 4.0HP4)Idle speed:2900rpm5)Blade speed:5400rpm6)Engine speed:9400rpm7)Fuel tank capacity:700ml 8) ... )Loading Amount:360pcs/20'GPBig 71cc 2.8kw petrol engine - massive power to get the job done FAST ... Work, Windows/Doors and also Metal Work with a compatible cutting wheel. Petrol Cut off saw with B blade