305901

Honda GX630 20.8 HP Engine

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Delivering performance and quality

Honda V-Twin engines offer horsepower, adaptability, quiet operation, and fuel efficiency. Not to mention a 3-year warranty.

Common Applications

  • Agricultural equipment
  • Commercial lawn and garden equipment
  • Construction/industrial equipment
  • Forestry equipment
  • Generators
  • Pressure washers
  • Small vehicles
  • Tillers/cultivators
  • Water pumps

FEATURES

FUEL-EFFICIENT, HIGH-OUTPUT OPERATION

  • Fuel economy is similar to fuel injection, with the simplicity of carburetion
  • Variable timing digital CDI ignition
  • Includes a rev limiter to protect against damage from over-revving
  • Two barrel inner-vent carburetor for more precise fuel metering
  • Insert style rod bearings

HIGH-OUTPUT PERFORMANCE

  • Hemispherical combustion chamber
  • 9.3:1 compression ratio generates high-power output without the need for premium fuel
  • Forged steel crankshaft
  • Pressure-fed crankshaft bearings.

SMOOTH PERFORMANCE

  • Integrated cylinder and head
  • Racing-inspired forged steel connecting rods.

EXCEPTIONALLY QUIET

  • High-capacity 36-blade cooling fan
  • Aluminum push rods with steel tips, lighter weight, lower vibration, and quieter operation.

PROVEN RELIABILITY

  • High-capacity oil pump
  • Dual cylindrical air filter
  • Large-diameter air intake for superior cooling
  • 3-Year Limited Warranty
  • Oil Alert.

EASY TO USE AND MAINTAIN

  • Hour meter available
  • Conveniently located controls, with several configurations available based on user preference
  • Automotive-type spin-on oil filter.

EASY STARTING

  • Automatic mechanical decompression system
  • Variable ignition timing.

Emissions Compliant

  • CARB and EPA certified
  • No catalyst necessary.

Available Options

  • High-capacity charging systems
  • A variety of control box configurations
  • Hour meter
  • Dry fuel versions

Specs

  • Engine Type - Air-cooled 4-stroke OHV

  • Bore x Stroke - 78 mm x 72 mm

  • Displacement - 688 cm^3

  • Net Power Output* - 20.8 hp (15.5 kW) @ 3,600 rpm

  • Net Torque - 35.6 lbs ft (48.3 Nm) @2,500 rpm

  • PTO Shaft Rotation - Counterclockwise (from PTO shaft side)

  • Compression Ratio - 9.3:1

  • Lamp/Charge coil options - 2.7A, 17A, 26A

  • Carburetor - Horizontal type, two barrel butterfly valve, internal vent.

  • Ignition System - Digital CDI with variable ignition timing

  • Starting System - Electric

  • Lubrication System - Forced lubrication

  • Governor System - Centrifugal mechanical

  • Air Cleaner - Dual element

  • Oil Capacity - 2.0 litres (2.1 U.S. qts)

  • Fuel - Unleaded 86 octane or higher

  • Dry Weight - 44 kg (96.8 lbs)

WASHING INSTRUCTIONS:

Machine wash separately in cold water on a gentle cycle. Tumble dry separately on low heat. Add QE Home Wool Dryer Balls to reduce wrinkles and increases drying efficiency. Touch up with a low heat iron as needed. Do not bleach or dry clean.

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