"With experience born on the raceways and roadways and a dedication to innovation, there's plenty of reasons to insist on the new Honda GX630 V-Twin engine. There's superior engine design, with a 90 configuration that reduces vibration and allows a compact footprint. There's superior construction, with a forged steel crankshaft and an integrated cylinder head. Fewer parts means better durability. There's a digital CDI ignition coil that ensures improved fuel economy and lowered emissions. There's even improved air cleaning, meaning that you can wait 5 times longer between filter changes. Honda even gives their engines a 3-year limited warranty. Fuel Tank Not included, Cylinder Bore Integrated, Max. RPM 3,600, Shaft Keyway in. 1/4, Key size 6.3mm x 50mm, Throttle Control Manual, Cooling System Air cooled, Bolt Circle in. 5, 6 1/2, 7 3/4, Bore x Stroke in. 3.1 x 2.8, Net Torque lbs./ft. 35.6 48.3 Nm at 2,500 RPM, Air Cleaner Type Dual element/Cylindrical, Application Concrete saw, pressure washer, chipper/shredder, trencher, vibratory roller, ride-on cement trowel, Dimensions L x W x H in. 15 7/8 x 16 1/8 x 17 3/16, Shaft Output Horizontal, Mounting Base L x W in. 7 11/16 x 3 25/64-4 21/32, Fuel Pump Boost type, EPA/CARB Approval California Air Resource Board Yes, Oil Capacity qt. 2, Shaft End Tapped Diameter in./Threads per inch 3/8-24, UNF2B, Shaft Diameter in. 1, Cylinders qty. 2, Carburetor 2-barrel, fuel cut solenoid, inner vent, Net Power Output HP 20.8 15.5 kW at 3,600 RPM, Compression Ratio 9.31, Low Oil Alert No, Lubrication System Full pressure, Fuel Type Gasoline, Charging System Amps 17, Flywheel Brake No, Engine Type GX series OHV V-Twin commercial-duty, Ignition System Electonic, Digital CDI w/variable ignition timing, Engine Displacement cc 688, PTO Height in. 5 1/4, Muffler Included Not included, Governor System Mechanical, Choke Control Manual, Shaft Length in. 2 29/32, Shaft Rotation From PTO Shaft Side Counterclockwise, Start Type Electric, shift type, Crankshaft Q-type. Keyswitch 688cc air-cooled, 4-stroke OHV engine 50-state compliant engine"
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