The Honda 620cc GX Series OHV V-Twin Horizontal commercial-grade engine incorporates proven Honda engine technology and design innovations to make it the most advanced power source available for OEM and replacement use. Overhead Valve design gives more power from a smaller package, runs cooler and lowers fuel consumption as compared to conventional side-valve engines. Cast iron cylinder sleeve provides longer service life. V-Twin offers powerful performance and meets EPA and CARB emission level standards. Common applications include concrete saws, pressure washers, chippers/shredders, trenchers, vibratory rollers and ride-on cement trowels. Displacement (cc): 620, Shaft Dimensions Diameter x L (in.): 1 x 2 29/32, Application: Concrete saws, pressure washers, generators, ride-on cement trowels, Torque (ft./lbs.): 29.9, Shaft Output: Horizontal, Engine Type: OHV, Start Type: Electric with recoil backup, Mounting Base L x W (in.): 7.69 x 3.39 to 4.65, Bolt Circle (in.): 5, 6.5, 7.75, Max. RPM: 3,600, Charging System Amps: 20, Ignition System: Transistorized magneto, Oil Capacity (qt.): 1.9, Air Cleaner Type: Dual element, Low Oil Alert: Yes, Lubrication System: Full pressure, Compression Ratio: 8.3:1, Bore x Stroke (in.): 3.0 x 2.8, Cylinder Bore: Cast iron, Flywheel Brake: No, Dimensions L x W x H (in.): 15.3 x 18 x 17.8, EPA/CARB Approval (California Air Resource Board): Yes Honda 620cc GX OHV V-Twin air-cooled, 4-stroke, 90 degrees, horizontal engine Displacement: 620cc (37.5 cu.in.) ignition 12V, 20 Amp charging system Centrifugal decompression Spin on oil filter Manual throttle and choke Keyswitch control box mounted on engine Fuel pump Low noise and vibration Fuel tank and muffler not included