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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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Only $1499.99
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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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Engine Displacement (cc)
688 337 163 187 187
Start Type
Electric Electric w/recoil backup Recoil Recoil Recoil
Application Commercial lawn equipment, construction/small vehicle Commerical turf equipment, lawn tractor, riding mower Walk-behind mower Billy Goat lawn vac, commercial mower Pressure washer, tiller, log splitter, walk-behind trimmer
Engine Type GX series OHV commercial-duty GXV series OHV commercial-duty GXV series OHV commercial-duty GSV series OHC GCV series OHC consumer/commercial
Net Power Output (HP) 22.1 (16.5 kW) at 3,600 RPM 8.9 (6.6 kW) at 3,600 RPM 4.3 (3.2 kW) at 3,600 RPM 5.1 (3.8 kW) at 3,600 RPM 5.1 (3.8 kW) at 3,600 RPM
Net Torque (lbs./ft.) 35.6 (48.3 Nm) at 2,500 RPM 15.9 (21.6 Nm) at 2,500 RPM 7.1 (9.6 Nm) at 2,500 RPM 8.3 (11.3 Nm) at 2,500 RPM 8.3 (11.3 Nm) at 2,500 RPM
Shaft Output
Vertical Vertical Vertical Vertical Vertical
Crankshaft 1 1/8 x 3 51/64 - - N1 type N5 type vertical
Shaft Diameter (in.) 1 1/8 1 7/8 7/8 7/8
Shaft Length (in.) 3 51/64 3.11 3 3/16 3 5/32 1 15/16 (49mm)
Shaft Keyway (in.)
1/4 1/4 - 3/16 3/16
Shaft End Tapped (Diameter (in.)/Threads per inch) 7/16-20 7/16–20 3/8–24 3/8–24 -
Shaft Rotation (From PTO Shaft Side) Counterclockwise Counterclockwise Counterclockwise Counterclockwise Counterclockwise
Bearing Type
Ball bearing - - Ball Oil seal
Cylinders (qty.)
2 1 1 1 1
Cylinder Bore
Cast iron Cast iron Cast iron Cast iron Aluminum alloy
Bore x Stroke (in.)
3 1/16 x 2 13/16 3.2 x 2.5 2.7 x 1.8 2.7 x 2.0 2.7 x 2
Compression Ratio
9.3:1 7.7:1 8.0:1 8.5:1 8.5:1
Cooling System
Air cooled Air cooled Air cooled Air cooled Air cooled
Air Cleaner Type
Dual element Dual element Dual element Dual element Dry (paper)
Fuel Tank - Yes Yes Yes Yes
Fuel Type Gasoline Gasoline Gasoline Gasoline Gasoline
Fuel Tank Capacity (qt.)
- 2.2 1.9 0.98 0.98
Fuel Pump Yes - - Yes -
Fuel Filter
Yes Mesh fuel filter - Yes Yes
Oil Capacity (qt.)
2.3 1.2 0.69 0.58 0.58
Lubrication System
Forced lubrication Pressure/splash Forced splash Forced splash Forced splash
Low Oil Alert
Oil pressure switch No - - No
Low Oil Shutdown
Oil pressure switch - - - No
Ignition System
Digital CDI Electronic Electronic Electronic Electronic
Governor System
Mechanical Centrifugal mechanical Centrifugal mechanical Centrifugal mechanical Centrifugal mechanical
Carburetor
2 barrel, fuel-cut solenoid, inner vent Float Float Horizontal butterfly valve Horizontal butterfly valve
Throttle Control
Remote (rod) Remote (wire) Manual Remote Fixed
Choke Control
Remote (rod) Remote (wire) Remote (wire) Remote (wire) Manual
Max. RPM
3,600 3,600 3,600 3,600 3,600
Charging System Amps 17 3 - - -
Muffler Included
No Yes Yes Yes Yes
Flywheel Brake
- - Yes No No
Auto Compression Release
Yes - Yes Yes Yes
Bolt Circle (in.)
7 3/4 10 8 8 8 1/2
Dimensions L x W x H (in.)
16 x 18 x 18 17 x 15 x 15 7/8 16 5/16 x 14 1/8 x 13 7/8 14 3/5 x 13 1/2 x 13 4/5 14 3/8 x 13 x 13 13/16
EPA/CARB Approval (California Air Resource Board)
Yes Yes Yes Yes Yes