Kohler CV173

Kohler CV173The Kohler CV173 is a 173 cc (10.6 cu·in) single-cylinder air-cooled four-stroke internal combustion gasoline engine from the Command PRO series, manufactured by Kohler Co.

The Kohler CV173 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 fixed main jet carburetor and dependable electronic magneto ignition system.

A 70.0 mm (2.75 in) cylinder bore and 45.0 mm (1.80 in) piston stroke give the CV173 engine a total of 173 cc of displacement. The compression ratio rating is 8.0:1.

This engine produces 10.5 Nm (1.07 kg·m; 7.75 ft·lb) at 2,600 rpm of peak torque.

The breakdown of the engine code is as follows:

  • C – Command series
  • V – Vertical PTO shaft
  • 173 – Numerical designation

General information

Engine Specifications
ModelCommand PRO CV173
Type4-stroke, OHV, single-cylinder
Displacement173 cm 3 (10.6 cu-in)
Max. horsepower
Max. torque10.5 Nm (1.07 kg·m; 7.75 ft·lb) at 2,600 rpm
Fuel systemCarburetor with a fixed main jet
Cooling systemForced-air
Ignition systemDependable electronic magneto
Lubricating systemFull-pressure lubrication
Starting systemRecoil starter
Fuel usedUnleaded gasoline (octane number 86 or higher)
Dimensions (L x W X H)434 x 353 x 281 mm (17.1 x 13.9 x 11.1 in)
Dry weight16.4 kg (36.2 lbs)

Cylinder Block and Head

Cylinder block
Compression ratio:8.0:1
Bore x Stroke70.0 mm X 45.0 mm (2.75 x 1.80 in)
Sleeve internal diameter70.000-70.020 mm (2.7550-2.7560 in)
Number of piston rings (compression / oil):2 / 1
Thrust face outer diameter69.960-69.980 mm (2.7543-2.7551 in)
Piston pin outer diameter
Ring-to-groove side clearance:Top0.010-0.020 mm (0.0004-0.0008 in)
Second0.010-0.020 mm (0.0004-0.0008 in)
Ring end gap:Top0.100-0.250 mm (0.0039-0.0098 in)
Second0.300-0.500 mm (0.0118-0.0197 in)
Crankshaft main journal diameter:
Crankpin journal diameter:
Cylinder Head
Valve Arrangement:OHV, gear drive
Valves:4 (2 per cylinder)
Valve head diameter:INTAKE25.875-26.125 mm (1.0187-1.0285 in)
EXHAUST23.875-24.125 mm (0.9399-0.9498 in)
Stem outer diameter:INTAKE5.465-5.480 mm (0.2152-0.2157 in)
EXHAUST5.465-5.480 mm (0.2152-0.2157 in)

Tightening torque specs

Tightening torque specs
Cylinder head (torque in 2 increments) Step 1: 13.0 Nm (1.3 kgf·m; 9.6 lb·ft)
Step 2: 20.7 Nm (2.1 kgf·m; 15.3 lb·ft)
Connecting rod12.5 Nm (1.3 kgf·m; 9.2 lb·ft)
Flywheel51.5 Nm (5.3 kgf·m; 38 lb·ft)
Spark plug27.0 Nm (2.75 kg·m; 20.0 ft·lb)

Service Information

Valve clearance
Intake0.0762-0.1270 mm (0.0030-0.0050 in)
Exhaust0.0762-0.1270 mm (0.0030-0.0050 in)
Oil system
Oil typeAPI SJ or higher
Recommended oilSAE 10W-30
Oil capacity0.6 liters (0.63 US.qts, 0.53 Imp. qts)
Ignition system
Spark plugKohler 1413214-S
Spark plug gap0.76 mm (0.0300 in)
Ignition module air gap0.254 mm (0.010 in)
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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