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Honda Horizontal Engine 20.8 Net HP 688cc OHV 12V ES 20 Amp 1" x 3" #GX630-QZB3

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Manufacturer: Honda
Part Number: GX630-QZB3


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20.8 Net HP Formerly Rated 23HP 
12 volt electric start, 20 amp alternator.
Keyswitch, manual throttle/choke.
1" x 3" keyed shaft, tapped 3/8".
OHV, full pressure lube w/ oil filter,
oil pressure switch, heavy duty industrial engine
3 year warranty.
Universal bolt pattern for easy repowering.
Model GX630-QZB3. 
98 lbs dry weight
49 State- Not Carb Compliant

Requires the following muffler choices (not included with engine):

Honda V-twin engines offer you superior features and unmatched quality:
  • More powerful
  • Low emissions with no catalyst
  • Ultra low vibration performance
  • Exceptionally quiet
  • Amazing fuel economy
  • Lightweight and compact
  • 3 Year limited warranty

Applications include:
  • Utility vehicles
  • Trenchers
  • Stump grinders
  • Chippers/Shredders
  • Concrete saws
  • Vibratory Rollers
  • Ride-on cement trowels
  • Commercial generators
  • Pressure Washers
Engine Type Air-cooled, 4-Stroke, OHV
Bore x Stroke 3.1" x 2.8" (78 x 72 mm)
Displacement 42 cu in (688 cm3)
Compression Ratio 9.3 : 1 
Net Horsepower* 20.8 hp (15.5 kW)
Net Torque* 35.6 lbs ft (48.3 Nm)
PTO Shaft Rotation Counterclockwise (from PTO shaft side)
Ignition System Digital CDI with variable ignition timing
Starting System Shift Type
Carburetor 2-barrel, fuel cut solenoid, inner vent
Lubrication System Full Pressure
Connecting Rod Forged Steel
Governor System Mechanical
Air Cleaner Dual Element Type/Cylindrical
Exhaust Emissions Certified for use in all 50 states
Evaporative Emissions Low permeation hose and purge joint provided
Oil Capacity 2.0 US qt (1.9 L)
Oil Filter Automotive Spin-On Style
Dimensions (L x W x H) 15.9" (405 mm) x 16.1" (410 mm) x 17.2" ( 438 mm)
Dry Weight 98 lbs (44.4 kg)
* The power rating of the engine indicated in this document is the net power output tested on a production engine for the engine model and measured in accordance with SAE J1349 at 3600 rpm . Mass production engines may vary from this value. Actual power output for the engine installed in the final machine will vary depending on numerous factors, including the operating speed of the engine in application, environmental conditions, maintenance and other variables.
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