"With experience born on the raceways and roadways and a dedication to innovation, there's plenty of reasons to insist on the new Honda GX660 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. Flywheel Brake No, Dimensions L x W x H in. 15 7/8 x 16 1/8 x 17 3/16, Governor System Mechanical, Ignition System Electonic, Digital CDI w/variable ignition timing, Low Oil Alert Yes, Cylinder Bore Integrated, Cylinders qty. 2, Choke Control Manual, Compression Ratio 9.31, EPA/CARB Approval California Air Resource Board Yes, Carburetor 2-barrel, fuel cut solenoid, inner vent, Charging System Amps 20, Air Cleaner Type Dual element/Cylindrical, Cooling System Air cooled, Crankshaft T type, Fuel Pump Boost type, Bolt Circle in. 5, 6 1/2, 7 3/4, Bore x Stroke in. 3.1 x 2.8, Shaft Rotation From PTO Shaft Side Counterclockwise, Shaft Diameter in. 1 1/8, Shaft End Tapped Diameter in./Threads per inch 7/16-20, UNF2B, Torque ft./lbs. 35.2, Throttle Control Manual, Rated Power HP 21, Max. RPM 3,600, Mounting Base L x W in. 7 11/16 x 3 25/64 to 4 21/32, Shaft Keyway in. 1/4, Key size 6.3mm x 70mm, Shaft Output Horizontal, Lubrication System Full pressure, Fuel Tank Not included, Fuel Type Gasoline, Muffler Included Not included, Oil Capacity qt. 2, PTO Height in. 5 1/4, Start Type Electric, shift type, Shaft Length in. 3 31/32, Engine Displacement cc 688, Engine Type GX series OHV V-Twin commercial-duty, Application Grain auger/elevator, pressure washer, semi-trailer w/power pack. 688cc air-cooled, 4-stroke OHV engine 50-state compliant engine"
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