Mufflers are available for this Honda V-Twin. Our item 601093 is a left hand low mount, 601105 is a left hand high mount. For right hand mounts we have item 601099, which is a low mount, and 601094 which is right hand high mount. Please call us at 1-800-221-0516 for more information.
Honda V-Twin Horizontal OHV Engine with Electric Start – 688cc, GX Series, 1 1/8in. x 3 31/32in. Shaft, Model# GX660RHTAF
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- 688cc air-cooled, 4-stroke OHV engine
- 50-state compliant engine
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See All Horizontal Engines
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Specifications
Specifications
Honda V-Twin Horizontal OHV Engine with Electric Start – 688cc, GX Series, 1 1/8in. x 3 31/32in. Shaft, Model# GX660RHTAF
Honda Engines, V-TWIN HORIZONTAL 688CC RQAF, Engine Displacement 688 cc, Engine Type GX Series OHV V-twin Commercial-duty, Shaft Diameter 1 in, Model# GX630RHXQAF
Honda Engines, V-TWIN HORIZONTAL 630CC RQAF1 Engine Displacement 688 cc, Engine Type GX Series OHV V-twin Commercial-duty, Shaft Diameter 1 in, Model# GX630RHXQAF1
Honda Engines GX Series 688cc Horizontal OHV V-Twin Engine, Model# GX630RHXQZE
Engine Displacement
Same
688 cc
688 cc
688 cc
688 cc
Engine Type
Same
GX Series OHV V-Twin commercial-duty
GX Series OHV V-twin Commercial-duty
GX Series OHV V-twin Commercial-duty
GX Series OHV V-twin Commercial-duty
Shaft Diameter
Same
1 1/8
1 in
1 in
1 in
Start Type
Same
Electric, shift type
Electric
Electric
Electric
Shaft Keyway
Same
1/4, (Key size 6.3mm x 70mm)
0.25 in
0.25 in
0.25 in
Crankshaft
Same
T-type
Q-type
Q-type
Q-type
PTO Height
Same
5 1/4
5.25 in
5.25 in
5.25 in
Cylinders (qty.)
Same
2
2
2
2
Cylinder Bore
Same
Integrated
Integrated
Integrated
Integrated
Compression Ratio
Same
9.3:1
9.3:1
9.3:1
9.3:1
Fuel Tank
Same
Not included
No
No
No
Low Oil Alert
Same
Yes
Yes
No
Yes
Shaft Rotation (From PTO Shaft Side)
Same
Counterclockwise
Counter Clockwise
Counter Clockwise
Counter Clockwise
Governor System
Same
Mechanical
Mechanical
Mechanical
Mechanical
Ignition System
Same
Electonic, digital CDI w/variable ignition timing
Electonic, Digital CDI W/variable Ignition Timing
Electonic, Digital CDI W/variable Ignition Timing
Electonic, Digital CDI W/variable Ignition Timing
Carburetor
Same
2-barrel, fuel cut solenoid, inner vent
2-barrel, Fuel Cut Solenoid, Inner Vent
2-barrel, Fuel Cut Solenoid, Inner Vent
2-barrel, Fuel Cut Solenoid, Inner Vent
Lubrication System
Same
Full pressure
Full Pressure
Full Pressure
Full Pressure
Cooling System
Same
Air cooled
Air
Air
Air
Air Cleaner Type
Same
Dual element/cylindrical
Dual Element
Dual Element
Dual Element
Choke Control
Same
Manual
Remote
Manual
Manual
Throttle Control
Same
Manual
Remote
Manual
Manual
Charging System Amps
Same
20
20
17
2.7
Muffler Included
Same
Not included
No
No
No
Shaft Length
Same
-
2.9 in
2.9 in
2.9 in
Net Torque
Same
-
35.6 ft-lbs.
35.6 ft-lbs.
35.6 ft-lbs.
Net Power Output
Same
-
20.8 HP
20.8 HP
20.8 HP
Oil Capacity
Same
-
2 qt
2 qt
2 qt
Bore
Same
-
3.1 in
3.1 in
3.1 in
Stroke
Same
-
2.8 in
2.8 in
2.8 in