Kohler CV495

Kohler CV495The Kohler CV495 is a 490 cc (29.9 cu·in) natural aspirated single-cylinder four-stroke air-cooled internal combustion small gasoline engine from the Command PRO series with a vertical shaft, manufactured by Kohler Co for general-purpose applications.

The cylinder bore and the piston stroke are 90.0 mm (3.60 in) and 77.0 mm (3.03 in), respectively. Compression ratio rating is 8.5:1.

The Kohler CV495 engine produced 18.2 PS (13.4 KW; 18.0 HP) at 3,600 rpm of horsepower and 38.1 Nm (3.9 kg·m; 28.1 ft·lb) at 2,400 rpm of torque.

The Kohler CV495 features:

  • OHV design
  • Hydraulic valve lifters
  • Aluminum cylinder block
  • Cast iron cylinder liners
  • Dependable electronic magneto ignition system
  • Carburetor with fixed main jet (Nikki or Keihin)
  • Mechanical centrifugal governor
  • Full pressure lubrication system
  • Forced air cooling system
  • Electric starter

General information

Engine Specifications
Engine modelCommand PRO CV495
Engine type4-stroke, OHV, single-cylinder
Displacement490 cm 3 (29.9 cu-in)
Max. horsepower18.2 PS (13.4 KW; 18.0 HP) at 3,600 rpm
Max. torque38.1 Nm (3.9 kg·m; 28.1 ft·lb) at 2,400 rpm
Cooling systemForced air
Air cleanerReplaceable, paper element
Lubricating systemFull pressure
Ignition systemDependable electronic magneto
Fuel systemCarburetor with fixed main jet (Nikki or Keihin)
Fuel usedUnleaded gasoline (octane number 86 or higher)
Starting systemElectric starter
GovernorMechanical centrifugal governor
PTO shaft rotationCounterclockwise (from PTO shaft side)
Dimensions (L x W X H)450 x 365 x 321 mm (17.7 x 14.4 x 12.6 in)
Dry weight41.9 kg (90.0 lbs)

Cylinder Block and Head

0.250-1.020 mm (0.0098-0.0402 in)

Cylinder block
Compression ratio:8.5:1
Cylinder bore:90.0 mm (3.60 in)
Piston stroke:77.0 mm (3.03 in)
Cylinder internal diameter (standard):90.000-90.025 mm (3.5433-3.5443 in)
Number of piston rings (compression / oil):2/1
Piston pin diameter:18.995-19.000 mm (0.7478-0.748 in)
Thrust face outer diameter (standard):89.951-89.969 mm (3.5413-3.5420 in)
Ring-to-groove side clearance (Top):0.060-0.105 mm (0.0023-0.0041 in)
Ring-to-groove side clearance (Second):0.040-0.085 mm (0.0015-0.0033 in)
Ring-to-groove side clearance (Oil):0.036-0.186 mm (0.0014-0.0073 in)
Ring end gap (Top):0.280-0.510 mm (0.0110-0.0200 in)
Ring end gap (Second):0.220-0.480 mm (0.0080-0.0180 in)
Ring end gap (Oil):0.250-0.760 mm (0.0098-0.0299 in)
Number of main bearings:2
Crankshaft main journal diameter: Flywheel end: 44.913-44.935 mm (1.7682-1.7691 in)
Oil pan end: 41.915-41.935 mm (1.6502-1.6510 in)
Crankpin journal diameter:38.958-30.970 mm (1.5338-1.2193 in)
Balance shaft bearing surface OD:19.962-19.975 mm (0.7859-0.7864 in)
Cylinder head
Valve arrangement:OHV, gear driven
Valves:2 (4 valves in total)
Valve head diameter (INTAKE):35.370-35.630 mm (1.3925-1.4028 in)
Valve head diameter (EXHAUST):31.370-31.630 mm (1.235-1.2453 in)
Valve seat angle (INTAKE):89°
Valve seat angle (EXHAUST):89°
Valve seat angle (INTAKE):45°
Valve seat angle (EXHAUST):45°
Valve steam diameter (INTAKE):6.982-7.000 mm (0.2749-0.2756 in)
Valve steam diameter (EXHAUST):6.970-6.988 mm (0.2744-0.2751 in)
Valve lift minimal (INTAKE):8.96 mm (0.353 in)
Valve lift minimal (EXHAUST):9.14 mm (0.360 in)
Camshaft journal diameter :19.962-19.975 mm (0.7859-0.7864 in)

Tightening torque specs

Tightening torque specs
Connecting rod 8 mm straight shank: 22.7 Nm (2.32 kg·m; 16.75 ft·lb)
8 mm step-down: 14.7 Nm (1.5 kg·m; 10.85 ft·lb)
6 mm straight shank: 11.3 Nm (1.15 kg·m; 8.34 ft·lb)
Cylinder head (torque in 2 increments) Step 1: 20.0 Nm (2.0 kg·m; 15.0 ft·lb)
Step 2: 40.0 Nm (4.0 kg·m; 30.0 ft·lb)
Fan9.9 Nm (1.0 kg·m; 7.3 ft·lb)
Flywheel66.4 Nm (6.77 kg·m; 49.0 ft·lb)
Muffler retaining nuts24.4 Nm (2.5 kg·m; 18.0 ft·lb)
Spark plug27 Nm (2.75 kg·m; 20.0 ft·lb)
Oil drain plug7.3-9.0 Nm (0.7-0.9 kgf·m; 5.4-6.6 lb·ft)

Service Data

Maximum speed:3600±50 rpm
Idle speed:1200±75 rpm
Compression pressure
Standard:1.1 MPa (160 psi)
Compression differential limit between cylinders:15% and less
Oil system
Lubrication system:Full pressure
Oil type:API SG, SH, SJ, or higher
Recommended oil:SAE 10W-30
Oil capacity: W/o oil filter: 1.7 L (1.8 US. qt, 1.5 Imp. qt.)
With oil filter: 1.9 L (2.0 US.qts, 1.7 Imp. qts)
Fuel system
Type:Carburetor with fixed main jet (Nikki or Keihin)
Fuel pump:Pulse type
Fuel filter:In-line
Ignition system
Type:Dependable electronic magneto
Spark plug:Champion RC12YC
Spark plug gap:0.76 mm (0.030 in)
Ignition coil air gap0.200-0.300 mm (0.0079-0.0118 in)


1. Kohler Command CV11-16, CV460-465, CV490-495 vertical camshaft service manual. Kohler Co. 1989.

Author: Sergei Wers
About: Co-founder and CEO of a multi-brand auto repair shop (engine repair, chassis repair, body repair and painting) for over 15 years. I have been developing internet sites with technical specifications for more than seven years.

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We try to use official documentation and verify the published data, but errors may occur. In addition, specifications of machinery and equipment may vary depending on markets and modifications. We do not recommend the use of this data for spare parts or repairs. Use official service manuals or parts catalogs for your product.

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