Kohler ECV630

Kohler ECV630The Kohler ECV630 is a 694 cc, (42.4 cu·in) V-twin air-cooled four-stroke internal combustion gasoline engine from the Command PRO EFI series, manufactured by Kohler Co.

The Kohler ECV630 engine has an OHV (overhead valve) design, an aluminum block with cast iron cylinder liners, a vertical PTO-shaft, pressurized lubrication system. This engine is equipped with an EFI (electronic fuel injection) system and electronic ignition system.

The cylinder bore and the piston stroke are 80.0 mm (3.15 in) and 69.0 mm (2.72 in), respectively. Compression ratio rating is 8.7:1.

The Kohler ECV630 engine produced 19.3 PS (14.2 KW; 19.0 HP) at 3,600 rpm of horsepower and 46.4 Nm (4.73 kg·m; 34.24 ft·lb) at 2,200 rpm of torque.

The breakdown of the engine code is as follows:

  • E – EFI
  • C – Command series
  • V – Vertical PTO shaft
  • 630 – Numerical designation

General information

Engine Specifications
ModelCommand PRO EFI ECV630
Type4-stroke, OHV, V-twin
Displacement694 cm 3 (42.4 cu-in)
Max. horsepower19.3 PS (14.2 KW; 19.0 HP) at 3,600 rpm
Max. torque46.4 Nm (4.73 kg·m; 34.24 ft·lb) at 2,200 rpm
Fuel systemEFI (electronic fuel injection) system
Cooling systemForced-air
Ignition systemElectronic ignition system
Lubricating systemPressurized lubrication
Starting systemElectric starter
Fuel usedUnleaded gasoline (octane number 86 or higher)
Dimensions (L x W X H)541 x 470 x 447 mm (21.3 x 18.5 x 17.6 in)
Dry weight49.0 kg (108.0 lbs)

Cylinder Block and Head

Cylinder block
Compression ratio:8.7:1
Bore x Stroke80.0 mm X 69.0 mm (3.15 x 2.72 in)
Sleeve internal diameter80.000-80.025 mm (3.1496-3.1506 in)
Number of piston rings (compression / oil):2 / 1
Piston style A
Thrust face outer diameter79.943-79.961 mm (3.1473-3.1480 in)
Piston pin outer diameter16.995-17.000 mm (0.6691-0.6693 in)
Ring-to-groove side clearance:Top0.050-0.095 mm (0.0019-0.0037 in)
Second0.030-0.075 mm (0.0012-0.00307 in)
Oil0.010-0.110 mm (0.0004-0.0043 in)
Ring end gap:Top0.250-0.560 mm (0.0100-0.0224 in)
Second0.250-0.560 mm (0.0100-0.0224 in)
Piston style B
Thrust face outer diameter79.966 mm (3.1483 in)
Piston pin outer diameter16.995-17.000 mm (0.6691-0.6693 in)
Ring-to-groove side clearance:Top0.030-0.070 mm (0.0010-0.0026 in)
Second0.030-0.070 mm (0.0010-0.0026 in)
Oil0.060-0.190 mm (0.0022-0.0073 in)
Ring end gap:Top0.100-0.279 mm (0.0039-0.0110 in)
Second1.400-1.679 mm (0.0551-0.0661 in)
Crankshaft main journal diameter:40.913-40.935 mm (1.6107-1.6116 in)
Crankpin journal diameter:35.950-35.973 mm (1.4153-1.4163 in)
Cylinder Head
Valve Arrangement:OHV, gear drive
Valves:4 (2 per cylinder)
Valve head diameter:INTAKE33.370-33.630 mm (1.3138-1.324 in)
EXHAUST29.370-29.630 mm (1.1563-1.1665 in)
Stem outer diameter:INTAKE6.982-7.000 mm (0.2749-0.2756 in)
EXHAUST6.970-6.988 mm (0.2744-0.2751 in)

Tightening torque specs

Tightening torque specs
Cylinder head Nut (torque in 2 increments):
Step 1: 16.9 Nm (1.72 kg·m; 12.5 ft·lb)
Step 2: 35.5 Nm (3.62 kg·m; 26.2 ft·lb)
Bolt (torque in 2 increments)
Step 1: 22.6 Nm (2.31 kg·m; 16.7 ft·lb)
Step 2: 41.8 Nm (4.26 kg·m; 30.8 ft·lb)
Flywheel71.6 Nm (7.3 kgf·m; 52.8 ft·lb)
Spark plug27 Nm (2.75 kg·m; 20.0 ft·lb)

Service Information

Oil system
Oil typeAPI SJ, or higher
Recommended oilSAE 10W-30, Kohler PRO 10W-50
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 plugChampion RC12YC or XC12YC
Spark plug gap0.76 mm (0.030 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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