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Honda V-Twin Vertical OHV Engine with Electric Start — 688cc, GXV Series, 1 1/8in. x 3.8in. Shaft, Model# GXV660RHTAF

Item# 166126
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Honda V-Twin Vertical OHV Engine with Electric Start — 688cc, GXV Series, 1 1/8in. x 3.8in. Shaft, Model# GXV660RHTAF

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Was $1299.99
Sale $1229.99

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  • Full pressure lubrication system
  • Forged steel connecting rod
  • Mechanical governor system
  • 50-state compliant engine
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Product Summary

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 gives their engines a 3-year limited warranty.

What's Included
  •  (1) Engine, Model# GXV660RHTAF

Features + Benefits

  • Full pressure lubrication system
  • Forged steel connecting rod
  • Mechanical governor system
  • 50-state compliant engine
Key Specs
Item# 166126
Brand Honda Engines
Manufacturer's Warranty 3 year limited warranty
Ship Weight 110.0 lbs
Engine Displacement (cc) 688
Start Type Electric
Engine Type Air cooled
Net Power Output (HP) 21.5 (16.0 kW) at 3,600 RPM
Net Torque (lbs./ft.) 35.6 (48.3 Nm) at 2,500 RPM
Shaft Output Vertical
Crankshaft 1 1/8 x 3.8
Shaft Diameter (in.) 1 1/8
Shaft Length (in.) 3.8
Shaft Rotation (From PTO Shaft Side) Counterclockwise
Cylinders (qty.) 2
Bore x Stroke (in.) 3.1 x 2.8
Compression Ratio 9.3 : 1
Air Cleaner Type Dual element
Oil Capacity (qt.) 2.3
Lubrication System Full pressure
Ignition System Digital CDI
Governor System Mechanical
Carburetor 2-barrel, fuel cut solenoid, inner vent
Bolt Circle (in.) 7 3/4
EPA/CARB Approval (California Air Resource Board) Yes

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Replacement Parts
Call To Order: 1-800-657-0516

Mon - Fri 7:00 AM - 6:00 PM (Central)
Sat 7:00 AM - 3:00 PM (Central)

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Honda V-Twin Vertical OHV Engine with Electric Start — 688cc, GXV Series, 1 1/8in. x 3.8in. Shaft, Model# GXV660RHTAF The price is $1,229.99.
Honda V-Twin Vertical OHV Engine with Electric Start — 688cc, GXV Series, 1 1/8in. x 3.8in. Shaft, Model# GXV660RHTAF
(Not Yet Rated - New)
Item# 166126
In Stock Online
Was $1299.99
Sale $1229.99
Save $70.00
Hide Similarities
Engine Displacement (cc)
160 187 187 163 688
Start Type
Recoil Recoil Recoil Recoil Electric
Application Lawn mower, chipper/vac, log splitter, pressure washer Pressure washer, tiller, log splitter, walk-behind trimmer Billy Goat lawn vac, commercial mower Walk-behind mower -
Engine Type GCV series OHV commercial-duty GCV series OHC consumer/commercial GSV series OHC GXV series OHV commercial-duty Air cooled
Net Power Output (HP) 4.4 (3.3 kW) at 3,600 RPM 5.1 (3.8 kW) at 3,600 RPM 5.1 (3.8 kW) at 3,600 RPM 4.3 (3.2 kW) at 3,600 RPM 21.5 (16.0 kW) at 3,600 RPM
Net Torque (lbs./ft.) 6.9 (9.4 Nm) at 2,500 RPM 8.3 (11.3 Nm) at 2,500 RPM 8.3 (11.3 Nm) at 2,500 RPM 7.1 (9.6 Nm) at 2,500 RPM 35.6 (48.3 Nm) at 2,500 RPM
Shaft Output
Vertical Vertical Vertical Vertical Vertical
Crankshaft N3 type N5 type vertical N1 type - 1 1/8 x 3.8
Shaft Diameter (in.) 63/64 (25mm) 7/8 7/8 7/8 1 1/8
Shaft Length (in.) 3 5/32 1 15/16 (49mm) 3 5/32 3 3/16 3.8
Shaft Keyway (in.) - 3/16 3/16 - -
Shaft End Tapped (Diameter (in.)/Threads per inch) - - 3/8–24 3/8–24 -
Shaft Rotation (From PTO Shaft Side) Counterclockwise Counterclockwise Counterclockwise Counterclockwise Counterclockwise
Bearing Type - Oil seal Ball - -
Cylinders (qty.)
1 1 1 1 2
Cylinder Bore Aluminum alloy Aluminum alloy Cast iron Cast iron -
Bore x Stroke (in.)
2.5 x 2.0 2.7 x 2 2.7 x 2.0 2.7 x 1.8 3.1 x 2.8
Compression Ratio
8.5:1 8.5:1 8.5:1 8.0:1 9.3 : 1
Cooling System Air cooled Air cooled Air cooled Air cooled -
Air Cleaner Type
Dry (paper) type Dry (paper) Dual element Dual element Dual element
Fuel Tank Yes Yes Yes Yes -
Fuel Type Gasoline Gasoline Gasoline Gasoline -
Fuel Tank Capacity (qt.) 0.98 0.98 0.98 1.9 -
Fuel Pump - - Yes - -
Fuel Filter - Yes Yes - -
Oil Capacity (qt.)
0.58 0.58 0.58 0.69 2.3
Lubrication System
Forced splash Forced splash Forced splash Forced splash Full pressure
Low Oil Alert - No - - -
Low Oil Shutdown - No - - -
Ignition System
Electronic Electronic Electronic Electronic Digital CDI
Governor System
Centrifugal mechanical Centrifugal mechanical Centrifugal mechanical Centrifugal mechanical Mechanical
Carburetor
Float Horizontal butterfly valve Horizontal butterfly valve Float 2-barrel, fuel cut solenoid, inner vent
Throttle Control - Fixed Remote Manual -
Choke Control - Manual Remote (wire) Remote (wire) -
Max. RPM 3,600 3,600 3,600 3,600 -
Muffler Included Yes Yes Yes Yes -
Flywheel Brake Yes No Yes Yes -
Auto Compression Release - Yes Yes Yes -
Bolt Circle (in.)
8 1/2 8 1/2 8 8 7 3/4
Dimensions L x W x H (in.) 14 3/8 x 13 x 13 13/16 14 3/8 x 13 x 13 13/16 14 3/5 x 13 1/2 x 13 4/5 16 5/16 x 14 1/8 x 13 7/8 -
EPA/CARB Approval (California Air Resource Board)
Yes Yes Yes Yes Yes