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Honda V-Twin 4-stroke OHV Engine with Electric Start — 688cc, GX Series, 1 1/8in. x 3 31/32in. Shaft, Model# GX690RHTXA2

Item# 44607
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Honda V-Twin 4-stroke OHV Engine with Electric Start — 688cc, GX Series, 1 1/8in. x 3 31/32in. Shaft, Model# GX690RHTXA2

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Only $1529.99
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  • 900 configuration reduces vibration and allows a compact footprint
  • Forged steel crankshaft and an integrated cylinder head for better durability
  • Digital CDI ignition coil for improved fuel economy and reduced emissions
  • Improved air cleaning system means that you can wait five times longer between filter changes
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Product Summary

There's plenty of reasons to insist on a Honda GX690 V-Twin engine. It has superior engine design, with a 900 configuration that reduces vibration and allows a compact footprint. It also has superior construction, with a forged steel crankshaft and an integrated cylinder head. Fewer parts means better durability. The digital CDI ignition coil ensures improved fuel economy and lowered emissions. Improved air cleaning system means that you can wait five times longer between filter changes.

What's Included
  •  (1) Engine

Features + Benefits

  • 900 configuration reduces vibration and allows a compact footprint
  • Forged steel crankshaft and an integrated cylinder head for better durability
  • Digital CDI ignition coil for improved fuel economy and reduced emissions
  • Improved air cleaning system means that you can wait five times longer between filter changes
Key Specs
Item# 44607
Brand Honda Engines
Manufacturer's Warranty 3 year limited warranty
Ship Weight 110.0 lbs
Engine Displacement (cc) 688
Start Type Electric
Application Grain auger/elevator, pressure washer, semi-trailer w/power pack
Engine Type GX series OHV V-Twin
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 Horizontal
Crankshaft T-type
Shaft Diameter (in.) 1 1/8
Shaft Length (in.) 3 31/32
Shaft Keyway (in.) 1/4 (key size 6.3mm x 70mm)
Shaft End Tapped (Diameter (in.)/Threads per inch) 7/16–20, UNF2B
Shaft Rotation (From PTO Shaft Side) Counterclockwise
PTO Height (in.) 5 1/4
Bearing Type Ball bearing
Cylinders (qty.) 2
Cylinder Bore Integrated
Bore x Stroke (in.) 3.1 x 2.8
Compression Ratio 9.3:1
Cooling System Air cooled
Air Cleaner Type Dual element
Fuel Tank Not included
Fuel Type Gasoline
Fuel Pump Boost type
Fuel Filter Yes
Oil Capacity (qt.) 2
Lubrication System Forced lubrication
Low Oil Alert Yes
Low Oil Shutdown Yes
Ignition System Electrical, digital CDI w/variable ignition timing
Governor System Mechanical
Carburetor (2) Barrel, fuel cut solenoid, inner vent
Throttle Control Manual
Choke Control Manual
Max. RPM 3,600
Charging System Amps 17
Muffler Included Not included
Flywheel Brake No
Auto Compression Release Yes
Bolt Circle (in.) 5, 6 1/2, 7 3/4
Mounting Base L x W (in.) 7 11/16 x 3 25/64–4 21/32
Dimensions L x W x H (in.) 15 7/8 x 16 1/8 x 17 3/16
EPA/CARB Approval (California Air Resource Board) Yes

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Estimated Delivery: 5 - 7 Business Days
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High-Mount Muffler for Honda V-Twin Engines — Fits GX630, 660 and 690 Engines, Left/Starter Side Mount, Model# MUF-0560R.SIL
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Estimated Delivery: 5 - 7 Business Days
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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 4-stroke OHV Engine with Electric Start — 688cc, GX Series, 1 1/8in. x 3 31/32in. Shaft, Model# GX690RHTXA2 The price is $1,529.99.
Honda V-Twin 4-stroke OHV Engine with Electric Start — 688cc, GX Series, 1 1/8in. x 3 31/32in. Shaft, Model# GX690RHTXA2
(Not Yet Rated - New)
Item# 44607
In Stock Online
Only $1529.99
Hide Similarities
Engine Displacement (cc)
688 688 688 688 688
Start Type
Electric start Electric, shift type Electric Electric Electric
Application Concrete saw, pressure washer, chipper/shredder, trencher, vibratory roller, ride-on cement trowel Lawn tractor, mower, utility vehicle, concrete saw, pressure washer, chipper/shredder, trencher, vibratory roller, ride-on cement trowel Pressure washer, lawn/garden equipment, generator, small vehicle, water pump Grain auger/elevator, pressure washer, semi-trailer w/power pack Grain auger/elevator, pressure washer, semi-trailer w/power pack
Engine Type GX series OHV V-Twin commercial-duty GX series OHV V-Twin commercial-duty GX series OHV V-Twin GX series OHV V-Twin GX series OHV V-Twin
Net Power Output (HP) 20.8 (15.5 kW) at 3,600 RPM 21.5 (16.0 kW) at 3,600 RPM 22.1 (16.5 kW) at 3,600 RPM 22.1 (16.5 kW) at 3,600 RPM 22.1 (16.5 kW) at 3,600 RPM
Net Torque (lbs./ft.) 35.6 (48.3 Nm) at 2,500 RPM 35.6 (48.3 Nm) at 2,500 RPM 35.6 (48.3 Nm) at 2,500 RPM 35.6 (48.3 Nm) at 2,500 RPM 35.6 (48.3 Nm) at 2,500 RPM
Shaft Output
Horizontal Horizontal Horizontal Horizontal Horizontal
Crankshaft Q-type T type T type T type T-type
Shaft Diameter (in.) 1 1 1/8 1 1/8 1 1/8 1 1/8
Shaft Length (in.) 2 29/32 3.55 2 29/32 3.55 3 31/32
Shaft Keyway (in.)
1/4, (Key size 6.3mm x 50mm) 1/4, (Key size 6.3mm x 70mm) 1/4 (key size 6.3mm x 70mm) 1/4 (key size 6.3mm x 70mm) 1/4 (key size 6.3mm x 70mm)
Shaft End Tapped (Diameter (in.)/Threads per inch) 3/8–24, UNF2B 7/16–20, UNF2B 7/16–20, UNF2B 7/16–20, UNF2B 7/16–20, UNF2B
Shaft Rotation (From PTO Shaft Side) Counterclockwise Counterclockwise Counterclockwise Counterclockwise Counterclockwise
PTO Height (in.)
5 1/4 5 1/4 5 1/4 - 5 1/4
Bearing Type
- - Ball bearing Ball bearing Ball bearing
Cylinders (qty.)
2 2 2 2 2
Cylinder Bore
Integrated Integrated Integrated Integrated Integrated
Bore x Stroke (in.)
3.1 x 2.8 3.1 x 2.8 78 x 72 3.1 x 2.8 3.1 x 2.8
Compression Ratio
9.3:1 9.3:1 9.3:1 9.3:1 9.3:1
Cooling System
Air cooled Air cooled Air cooled Air cooled Air cooled
Air Cleaner Type
Dual element/cylindrical Dual element/cylindrical Dual element Dual element Dual element
Fuel Tank Not included Not included No No Not included
Fuel Type Gasoline Gasoline Gas Gas Gasoline
Fuel Pump
Boost type Boost type Boost type Boost type Boost type
Fuel Filter
- - Fuel strainer - Yes
Oil Capacity (qt.)
2 2 2.1 2 2
Lubrication System
Full pressure Full pressure Forced lubrication Full pressure Forced lubrication
Low Oil Alert
Yes - No Yes Yes
Low Oil Shutdown
- - No No Yes
Ignition System
Electonic, digital CDI w/variable ignition timing Electonic, digital CDI w/variable ignition timing Electrical, digital CDI w/variable ignition timing Electrical, digital CDI w/variable ignition timing Electrical, digital CDI w/variable ignition timing
Governor System
Mechanical Mechanical Mechanical Mechanical Mechanical
Carburetor
2-barrel, fuel cut solenoid, inner vent 2-barrel, fuel cut solenoid, inner vent Horizontal, two-barrel butterfly valve, internal vent (2) Barrel, fuel cut solenoid, inner vent (2) Barrel, fuel cut solenoid, inner vent
Throttle Control
Manual Remote (wire) Remote Manual Manual
Choke Control
Manual Remote (wire) Remote Manual Manual
Max. RPM
3,600 3,600 3,600 3,600 3,600
Charging System Amps 2.7 20 20 20 17
Muffler Included
Not included Not included No No Not included
Flywheel Brake
No No No No No
Auto Compression Release
- - Yes - Yes
Bolt Circle (in.)
5, 6 1/2, 7 3/4 5, 6 1/2, 7 3/4 5, 6 1/2, 7 3/4 5, 6 1/2, 7 3/4 5, 6 1/2, 7 3/4
Mounting Base L x W (in.)
7 11/16 x 3 25/64–4 21/32 7 11/16 x 3 25/64–4 21/32 7 11/16 x 3 25/64–4 21/32 7 11/16 x 3 25/64–4 21/32 7 11/16 x 3 25/64–4 21/32
Dimensions L x W x H (in.)
15 7/8 x 16 1/8 x 17 3/16 15 7/8 x 16 1/8 x 17 3/16 15 9/10 x 16 1/10 x 17 1/5 16 x 18 x 18 15 7/8 x 16 1/8 x 17 3/16
EPA/CARB Approval (California Air Resource Board)
Yes Yes Yes Yes Yes