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Honda Vertical Engine — 688cc, GX Series, 1 1/8in. x 3 51/64in. Shaft, Model# GXV690RHTAF

Item# 44368
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Honda Vertical Engine — 688cc, GX Series, 1 1/8in. x 3 51/64in. Shaft, Model# GXV690RHTAF

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Was $1499.99
Sale $1399.99

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  •  Configuration reduces vibration and allows a compact footprint
  • Superior construction, with forged steel crankshaft and integrated cylinder head
  • Fewer parts for durability
  • Digital CDI ignition coil to ensure improved fuel economy and lowered emissions
  • Improved air cleaning for fewer filter changes
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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 GX690 V-Twin engine. There's superior engine design, with a 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. Improved air cleaning means that you can wait longer between filter changes.

What's Included
  •  (1) Engine

Features + Benefits

  •  Configuration reduces vibration and allows a compact footprint
  • Superior construction, with forged steel crankshaft and integrated cylinder head
  • Fewer parts for durability
  • Digital CDI ignition coil to ensure improved fuel economy and lowered emissions
  • Improved air cleaning for fewer filter changes
Key Specs
Item# 44368
Brand Honda Engines
Manufacturer's Warranty 3 year limited warranty
Ship Weight 110.0 lbs
Engine Displacement (cc) 688
Start Type Electric
Application Commercial lawn equipment, construction/small vehicle
Engine Type GX series OHV commercial-duty
Net Power Output (HP) 22.1 (16.5 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 51/64
Shaft Diameter (in.) 1 1/8
Shaft Length (in.) 3 51/64
Shaft Keyway (in.) 1/4
Shaft End Tapped (Diameter (in.)/Threads per inch) 7/16-20
Shaft Rotation (From PTO Shaft Side) Counterclockwise
Bearing Type Ball bearing
Cylinders (qty.) 2
Cylinder Bore Cast iron
Bore x Stroke (in.) 3 1/16 x 2 13/16
Compression Ratio 9.3:1
Cooling System Air cooled
Air Cleaner Type Dual element
Fuel Type Gasoline
Fuel Pump Yes
Fuel Filter Yes
Oil Capacity (qt.) 2.3
Lubrication System Forced lubrication
Low Oil Alert Oil pressure switch
Low Oil Shutdown Oil pressure switch
Ignition System Digital CDI
Governor System Mechanical
Carburetor 2 barrel, fuel-cut solenoid, inner vent
Throttle Control Remote (rod)
Choke Control Remote (rod)
Max. RPM 3,600
Charging System Amps 17
Muffler Included No
Auto Compression Release Yes
Bolt Circle (in.) 7 3/4
Dimensions L x W x H (in.) 16 x 18 x 18
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 Vertical Engine — 688cc, GX Series, 1 1/8in. x 3 51/64in. Shaft, Model# GXV690RHTAF The price is $1,399.99.
Honda Vertical Engine — 688cc, GX Series, 1 1/8in. x 3 51/64in. Shaft, Model# GXV690RHTAF
(Not Yet Rated - New)
Item# 44368
In Stock Online
Was $1499.99
Sale $1399.99
Save $100.00
Hide Similarities
Engine Displacement (cc)
25 160 187 337 688
Start Type
Recoil Recoil Recoil Electric w/recoil backup Electric
Application String trimmer, mini-tiller Walk-behind mower, chipper/vac Billy Goat lawn vac, commercial mower Commerical turf equipment, lawn tractor, riding mower Commercial lawn equipment, construction/small vehicle
Engine Type GX series 4-stroke OHC GCV series OHC commercial-duty GSV series OHC GXV series OHV commercial-duty GX series OHV commercial-duty
Net Power Output (HP) 1.0 (.72 kW) at 7,000 RPM 4.4 (3.3 kW) at 3,600 RPM 5.1 (3.8 kW) at 3,600 RPM 8.9 (6.6 kW) at 3,600 RPM 22.1 (16.5 kW) at 3,600 RPM
Net Torque (lbs./ft.) 0.74 (1.0 Nm) at 5,000 RPM 6.9 (9.4 Nm) at 2,500 RPM 8.3 (11.3 Nm) at 2,500 RPM 15.9 (21.6 Nm) at 2,500 RPM 35.6 (48.3 Nm) at 2,500 RPM
Shaft Output
Vertical Vertical Vertical Vertical Vertical
Crankshaft - N1 type N1 type - 1 1/8 x 3 51/64
Shaft Diameter (in.) Clutch 7/8 7/8 1 1 1/8
Shaft Length (in.) Crank/piston assembly 3 5/32 3 5/32 3.11 3 51/64
Shaft Keyway (in.)
- 3/16 3/16 1/4 1/4
Shaft End Tapped (Diameter (in.)/Threads per inch) - 3/8–24 3/8–24 7/16–20 7/16-20
Shaft Rotation (From PTO Shaft Side) Counterclockwise Counterclockwise Counterclockwise Counterclockwise Counterclockwise
PTO Height (in.) 3.4 - - - -
Bearing Type
Ball - Ball - Ball bearing
Cylinders (qty.)
1 1 1 1 2
Cylinder Bore
Cast iron Aluminum alloy Cast iron Cast iron Cast iron
Bore x Stroke (in.)
1 3/8 x 1 2.5 x 2.0 2.7 x 2.0 3.2 x 2.5 3 1/16 x 2 13/16
Compression Ratio
8:1 8.5:1 8.5:1 7.7:1 9.3:1
Cooling System
Forced air Air cooled Air cooled Air cooled Air cooled
Air Cleaner Type
Semi-dry Dry (paper) type Dual element Dual element Dual element
Fuel Tank Yes Yes Yes Yes -
Fuel Type Gasoline Gasoline Gasoline Gasoline Gasoline
Fuel Tank Capacity (qt.) 0.61 0.98 0.98 2.2 -
Fuel Pump
Accelerator pump in carburetor - Yes - Yes
Fuel Filter
Yes - Yes Mesh fuel filter Yes
Oil Capacity (qt.)
0.084 0.58 0.58 1.2 2.3
Lubrication System
Oil mist, crankshaft pressure-driven Forced splash Forced splash Pressure/splash Forced lubrication
Low Oil Alert
- - - No Oil pressure switch
Low Oil Shutdown
- - - - Oil pressure switch
Ignition System
Transistorized magneto Electronic Electronic Electronic Digital CDI
Governor System
- Centrifugal mechanical Centrifugal mechanical Centrifugal mechanical Mechanical
Carburetor
Diaphragm (overflow return) Float Horizontal butterfly valve Float 2 barrel, fuel-cut solenoid, inner vent
Throttle Control
Manual Remote (wire) Remote Remote (wire) Remote (rod)
Choke Control
Manual Remote (wire) Remote (wire) Remote (wire) Remote (rod)
Max. RPM
7,000 3,600 3,600 3,600 3,600
Charging System Amps - - - 3 17
Muffler Included
Yes Yes Yes Yes No
Flywheel Brake - Yes Yes - -
Auto Compression Release
Yes - Yes - Yes
Bolt Circle (in.)
2.6 8 1/2 8 10 7 3/4
Mounting Base L x W (in.) 2.3 x 2.3 - - - -
Dimensions L x W x H (in.)
7 3/5 x 8 7/10 x 9 1/10 14 3/8 x 13 x 13 13/16 14 3/5 x 13 1/2 x 13 4/5 17 x 15 x 15 7/8 16 x 18 x 18
EPA/CARB Approval (California Air Resource Board)
Yes Yes Yes Yes Yes