model ZH4100Y1ZH4100Y2-3ZH4102Y4ZH4102Y4-2 form inline, water-cooled, four stroke air inlet naturally aspirated combustion di * 4-100*115 4-100*1154-102*1154-102*115 the diameter of the cylinder piston stroke piston displacement calibration of 3.613.616.766.76 power 44/220044/220046/240046/2400 cooling water-cooling startup electric starting pressure and splash lubrication composite