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