This Briggs & Stratton 850 Professional-Series OHV vertical shaft engine for push mowers has ReadyStart recoil start for easy, no-prime, no-choke starts. U.S.A. Engine Displacement (cc): 190, Start Type: Recoil, Application: Push mower, Engine Type: 850 Professional-series, Torque (ft./lbs.): 8.5, Shaft Output: Vertical, Crankshaft: 7/8 in. x 3 5/32in., Shaft Diameter (in.): 7/8, Shaft Length (in.): 3 5/32, Shaft Keyway (in.): (2) Woodruff keys and 3/16-in. straight keyway, Shaft End Tapped (Diameter (in.)/Threads per inch): 3/8/24, Shaft Rotation (From PTO Shaft Side): CCW, Gear Reduction: No, Bearing Type: Plain, Cylinders (qty.): 1, Cylinder Bore: Cast iron, Bore x Stroke (in.): 2.69 x 2.04, Cooling System: Air cooled, Air Cleaner Type: Commercial-grade with dual seals, Fuel Tank: 1.6, Fuel Type: Gasoline, Fuel Tank Capacity (qt.): 1.6, Fuel Pump: No, Fuel Filter: No, Oil Capacity (qt.): 18-20oz., Lubrication System: Splash, Low Oil Alert: No, Low Oil Shutdown: No, Ignition System: Electronic, Governor System: Mechanical, Carburetor: Float, Throttle Control: Remote or manual friction, Max. RPM: 3,100, Muffler Included: Yes, Flywheel Brake: Yes, Auto Compression Release: Yes, Bolt Circle (in.): 8, Dimensions L x W x H (in.): 15 3/8 x 13 3/4 x 10, EPA/CARB Approval (California Air Resource Board): Yes