Service Manual

Warranty Information

Overview

Kohler 18 HP Command V-Twin Horizontal Engine. This gasoline-driven, 4-cycle, 18 HP engine has reliable features including: OHV, cast iron V-Twin cylinder liners, and aluminum block construction.

Kohler Command V-Twin OHV Horizontal Engine with Electric Start — 18 HP, PA-CH620-3040 Alkota Pressure Washer Medart

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

• (1) Engine

• Key Specs

  Engine Displacement (cc)	624
  Start Type	Electric
  Engine Type	Command Pro V-Twin - CH18 - OHV
  Rated Power (HP)	18
  Torque (ft./lbs.)	32.8
  Displacement (cu. in.)	38.1
  Shaft Output	Horizontal
  Shaft Diameter (in.)	1 1/8
  Shaft Length (in.)	4
  Shaft End Tapped (Diameter (in.)/Threads per inch)	7/16 - 20
  Shaft Rotation (From PTO Shaft Side)	Counterclockwise
  Cylinders (qty.)	2
  Cylinder Bore	Cast iron
  Bore x Stroke (in.)	3.03 x 2.64
  Compression Ratio	8.5:1
  Cooling System	Air cooled
  Air Cleaner Type	Dual element air filter with foam pre-cleaner
  Fuel Type	Gasoline
  Fuel Pump	Mechanical
  Fuel Filter	In line
  Oil Capacity (qt.)	2
  Lubrication System	Full pressure
  Ignition System	Electronic
  Governor System	Manual
  Carburetor	Smart Choke
  Max. RPM	3,600
  Muffler Included	Yes
  Bolt Circle (in.)	5 5/8, 7 3/4
  Mounting Base L x W (in.)	7 1/4 x 3 1/2
  Dimensions L x W x H (in.)	14 x 17 11/16 x 19
  EPA/CARB Approval (California Air Resource Board)	Yes
  Manufacturer Warranty	24 months parts / 24 months labor
  Ship Weight	125.0 lbs
  Item#	CH620-3040 Alkota Pressure Washer - Medart

Manufacturer Warranty: 24 months parts / 24 months labor

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