Kohler Engines. Relentless Power. Legendary Performance.

Command PRO



This V-twin cylinder, air-cooled, horizontal-shaft engine is built to last. OHV, cast iron cylinder liners, and aluminum block construction make the 4-cycle, gasoline-powered Command PRO® ready for the long haul.

Fuel Type
20.5 Horizontal V-Twin Air Gasoline Current
Engine Uses

Durable, Long Life Design.

Hydraulic valve lifters are oil pressurized, ensuring that push rods stay in constant contact with the rocker arms. Requiring no adjustment, the valve train is virtually maintenance-free. In addition, full-pressure lubrication delivers continuous lube to critical engine components, even at 25-degree angle of operation and optional oil cooler regulates the oil temperature extending oil-change intervals. Large capacity, in-line fuel filter provides extra protection against dirt particles that can clog fuel lines.

High Power Performance.

Overhead valve technology provides greater volumetric efficiency and a higher compression ratio. This produces more power, improved fuel economy and cooling and reduces oil consumption. In addition, there is virtually no carbon buildup, reducing overall maintenance costs. The variable speed, mechanical governor promises smooth performance, regardless of application or fluctuating demands for power.

Reliable Starting.

KOHLER Command PRO® electronic ignition system generates a stronger spark at low cranking speed and Automatic Compression Release (ACR) allows compression to escape during cranking to reduce pull force.


User-Friendly Maintenance.

  • Extended maintenance intervals
  • Yellow oil fill cap & dipstick handle
  • Dual oil drains
  • Easy-access oil fill/dipstick
  • Two-year limited warranty

High Power Performance.

  • High-performance spark plugs
  • 20 amp charging, regulated
  • Larger in-line fuel filter
  • Overhead valve (OHV) design

Reliability and Long Life Design.

  • Hardened crankshaft journals
  • High-efficiency fan and screen
  • Larger dual-element air filter with foam pre-cleaner
  • Cast iron cylinder liners
  • Hydraulic valve lifters
  • Full-pressure lubrication
  • Spin-on, full-flow oil filter

Quiet, Smooth Operation.

  • Engineered material blower housing
  • Mechanical fuel pump
  • CARB & EPA emission-certified

Easy Dependable Starts.

  • Smart-Choke™ carburetor
  • Electronic ignition system
  • Solenoid shift starter
Engine Uses
Golf Course Maintenance
Lawn & Landscape
Power Generation/Welder
Recreational Vehicles
Utility Equipment

Equipment Types

This engine powers the following equipment:

  • Auger, Grain
  • Conveyor
  • Two-Wheel Tractor
  • Utility Vehicle
  • Bale Chopper
  • Feeder
  • Utility Tractor
  • Aerator-Fairway
  • Blower
  • Lawn Blower
  • Mower, Greens-Walk-Behind
  • Sand Trap/Bunker Rake
  • Utility Vehicle
  • Aerator-Greens
  • Golf Cart
  • Mower, Greens-Riding
  • Mower, Riding Fairway
  • Sod Cutter
  • Aerial Lift
  • Boaring Equipment
  • Cable Layer
  • Compressor
  • Concrete Saw
  • Curber
  • Fire Pump
  • Hydraulic Power Pack
  • Material Handling Power Buggy
  • Mixer
  • Planer/Grinder/Scarifier (Concrete)
  • Pump, Mud
  • Pump - Other
  • Roller
  • Signal Board
  • Sprayer, Other
  • Tamper/Plate Compactor
  • Trencher
  • Utility Vehicle
  • Vibrator
  • Auger/Post Hole Digger
  • Buffer/Floor Stripper
  • Carpet Cleaner
  • Concrete Breaker
  • Concrete Trowel
  • Fan, Cooling/Other
  • Forklift
  • Loader/Backhoe
  • Mini Excavator/Dozer
  • Paving Equipment
  • Pressure Washer
  • Pump, Oil/Gas
  • Rammer
  • Screed
  • Skid Steer Loader
  • Sprayer, Paint
  • Tar Kettle/Crack Sealer
  • Truck Loader/Hoist
  • Vehicle
  • Aerator
  • Dethatcher
  • Fogger
  • Lawn Tractor
  • Logsplitter
  • Mower, Rear Steer Front Mount
  • Mower, Trans Steer Front Mount
  • Mower, Triplex Trim/Finish Cut
  • Mower, Wide Area Walk Behind
  • Mower, Zero Turn Radius
  • Rear Engine Rider
  • Shredder
  • Sprayer, Hydro Mulcher
  • Sweeper
  • Vacuum
  • Chipper/Shredder
  • Edger
  • Garden Tractor
  • Lawn Vacuum
  • Mower, Brush Cutter
  • Mower, Three Wheel Front Mount, Rear Op
  • Mower, Trim
  • Mower, Walk-Behind
  • Mower, Zero Turning Radius Light Duty
  • Pressure Washer
  • Saw Mill
  • Sod Cutter
  • Stump Grinder/Cutter
  • Tiller
  • Yard Tractor
  • Light Tower
  • Mobile Generator
  • Residential Standby Generator
  • Welder
  • Marine Generator
  • Portable Generator
  • RV Generator
  • ATV
  • Golf Cart
  • Go-Kart
  • Utility Vehicle
  • Welder

Engine Type:

4-cycle, gasoline, OHV, cast iron cylinder liners, aluminum block

Command PRO® CH640
J1940 Power hp(kW) 1 20.5 (15.3)
Displacement cu in (cc) 41.1 (674)
Bore in (mm) 3.1 (80)
Stroke in (mm) 2.6 (67)
Peak Torque lbs. ft (Nm) 35.7 (48.4)
Compression Ratio 8.5:1
Dry Weight lbs (kg) 90 (41)
Oil Capacity U.S. quarts (L) 2 (1.9)
Lubrication Full pressure w/full-flow filter
Dimensions L x W x H in 14 x 17.7 x 19.0
Backpressure Limit 2 50
J1995 Power hp (kW) 3 20.9 (15.6)
J1995 Rated Speed (RPM)  3600
* Length is grass screen to PTO mounting face. Width is spark plug to spark plug. Height is top of air cleaner to mounting feet.
1 Power (hp) and Torque (lbs ft) specifications for Kohler general purpose engines are rated pursuant to Society of Automotive Engineers (SAE) J1940 based on gross output testing performed according to SAE J1995 without the air cleaner and muffler. Actual engine power and torque are lower and affected by accessories (air cleaner, exhaust, charging, cooling, fuel pump, etc.), application, engine speed, ambient operating conditions (temperature, humidity and altitude) and other factors. This J1940 / J1995 rating provides consistent measurement to customers who may want to control the intake and exhaust features of the engine. For more information, contact Kohler Co. Engine Engineering Department. Kohler Co. reserves the right to change product specifications, designs and standard equipment without notice and without incurring obligation.

2 Inches of H20 @ 3600 RPM WOT

3 J1995 power and torque certified by 3rd Party Witness