Kohler CV13

Kohler CV13The Kohler CV13/CV13S is a 398 cc (24.3 cu·in) single-cylinder air-cooled four-stroke internal combustion gasoline engine from the Command PRO series, manufactured by Kohler Co.

The Kohler CV13 engine has an OHV (overhead valve) design, an aluminum block with cast iron cylinder liners, vertical PTO-shaft, full-pressurized lubrication system. This engine is equipped with a carburetor (Nikki or Keihin) with a fixed main jet and dependable electronic magneto ignition system.

A 87.0 mm (3.43 in) cylinder bore and 67.0 mm (2.64 in) piston stroke give the CV13 engine a total of 398 cc of displacement. The compression ratio rating is 8.5:1.

This engine produced 13.3 PS (9.75 KW; 13.0 HP) at 3,600 rpm of horsepower and 28.7 Nm (2.9 kg·m; 21.2 ft·lb) at 2,500 rpm of torque.

The breakdown of the engine code is as follows:

  • C – Command series
  • V – Vertical PTO shaft
  • 13 – Numerical designation
  • Version code
    • S – Electric Start
    • T – Retractable Start
    • ST – Electric/Retractable Start

General information

Engine Specifications
Model Command PRO CV13 / CV13S
Type 4-stroke, OHV, single-cylinder
Displacement 398 cm 3 (24.3 cu-in)
Max. horsepower 13.3 PS (9.75 KW; 13.0 HP) at 3,600 rpm
Max. torque 28.7 Nm (2.9 kg·m; 21.2 ft·lb) at 2,500 rpm
Fuel system Carburetor with a fixed main jet (Nikki or Keihin)
Cooling system Forced-air
Ignition system Dependable electronic magneto
Lubricating system Pressurized lubrication
Starting system Electric starter
Fuel used Unleaded gasoline (octane number 86 or higher)
Dimensions (L x W X H) 450 x 365 x 321 mm (17.7 x 14.4 x 12.6 in)
Dry weight 39.5 kg (87.1 lbs)

Cylinder Block and Head

Cylinder block
Compression ratio: 8.5:1
Bore x Stroke 87.0 mm X 67.0 mm (3.43 x 2.64 in)
Sleeve internal diameter 87.000-87.025 mm (3.4252-3.4262 in)
Number of piston rings (compression / oil): 2 / 1
Thrust face outer diameter 86.941-86.959 mm (3.4229-3.4236 in)
Piston pin outer diameter 18.995-19.000 mm (0.7478-0.748 in)
Ring-to-groove side clearance: Top 0.034-0.100 mm (0.0013-0.0039 in)
Second 0.040-0.080 mm (0.0016-0.0031 in)
Oil 0.036-0.186 mm (0.0014-0.0073 in)
Ring end gap: Top 0.250-0.500 mm (0.0098-0.0197 in)
Second 0.250-0.510 mm (0.0098-0.0201 in)
Oil 0.250-1.020 mm (0.0098-0.0402 in)
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)
Cylinder Head
Valve Arrangement: OHV, gear drive
Valves: 2
Valve head diameter: INTAKE 35.370-35.630 mm (1.3925-1.4028 in)
EXHAUST 31.370-31.630 mm (1.235-1.2453 in)
Stem outer diameter: INTAKE 6.982-7.000 mm (0.2749-0.2756 in)
EXHAUST 6.970-6.988 mm (0.2744-0.2751 in)

Tightening torque specs

Tightening torque specs
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)
Flywheel 66.4 Nm (6.77 kg·m; 49 ft·lb)
Spark plug 27 Nm (2.75 kg·m; 20.0 ft·lb)

Service Information

Oil system
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)
Ignition system
Spark plug Champion RC12YC
Spark plug gap 1.00 mm (0.0394 in)
Ignition module air gap 0.200-0.300 mm (0.0079-0.0118 in)
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