Kohler ECV870

Kohler ECV870The Kohler ECV870 is a 824 cc, (50.3 cu·in) V-twin air-cooled four-stroke internal combustion gasoline engine from the Command PRO EFI series, manufactured by Kohler Co.

The Kohler ECV870 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, an electronic governor or a mechanical governor.

The cylinder bore and the piston stroke are 86.0 mm (3.40 in) and 71.0 mm (2.80 in), respectively. Compression ratio rating is 8.9:1.

The Kohler ECV870 engine produced 31.4 PS (23.1 KW; 31.0 HP) at 3,600 rpm of horsepower and 66.6 Nm (6.8 kg·m; 49.1 ft·lb) of peak torque.

The breakdown of the engine code is as follows:

  • E – EFI (Electronic Fuel Injection)
  • C – Command series
  • V – Vertical PTO shaft
  • 870 – Numerical designation

General information

Engine Specifications
ModelCommand PRO EFI ECV870
Type4-stroke, OHV, V-twin
Displacement824 cm 3 (50.3 cu-in)
Max. horsepower31.4 PS (23.1 KW; 31.0 HP) at 3,600 rpm
Max. torque66.6 Nm (6.8 kg·m; 49.1 ft·lb)
Fuel systemEFI (Electronic Fuel Injection)
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)500 x 521 x 610 mm (19.7 x 20.5 x 24.0 in)
Dry weight61.7 kg (136.0 lbs)

Cylinder Block and Head

Cylinder block
Compression ratio:8.9:1
Bore x Stroke86.0 mm X 71.0 mm (3.40 x 2.80 in)
Sleeve internal diameter86.000-86.025 mm (3.3858-3.3868 in)
Number of piston rings (compression / oil):2 / 1
Thrust face outer diameter85.956-85.974 mm (3.3841-3.3848 in)
Piston pin outer diameter21.996-22.000 mm (0.8660-0.8661 in)
Ring-to-groove side clearance:Top0.040-0.080 mm (0.0016-0.0031 in)
Second0.030-0.070 mm (0.0012-0.0028 in)
Oil0.060-0.190 mm (0.0024-0.0074 in)
Ring end gap:Top0.150-0.300 mm (0.0059-0.0118 in)
Second0.650-0.800 mm (0.0256-0.0315 in)
Crankshaft main journal diameter:44.978-45.000 mm (1.7708-1.7716 in)
Crankpin journal diameter:53.000-53.150 mm (2.0866-2.0925 in)
Cylinder Head
Valve Arrangement:OHV, gear drive
Valves:4 (2 per cylinder)
Valve head diameter:INTAKE38.600-38.805 mm (1.5197-1.5295 in)
EXHAUST29.375-29.625 mm (1.1565-1.1663 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 Step 1: 23.7 Nm (2.4 kgf·m; 17.5 lb·ft)
Step 2: 46.9 Nm (4.8 kgf·m; 34.6 lb·ft)
Flywheel71.6 Nm (7.3 kgf·m; 52.8 lb·ft)
Spark plug27 Nm (2.75 kg·m; 20.0 lb·ft)

Service Information

Oil system
Oil typeAPI SJ, or higher
Recommended oilSAE 10W-30, Kohler PRO 10W-50
Oil capacity2.6 liters (2.75 US.qts, 2.29 Imp. qts)
Ignition system
Spark plugChampion RA8HC
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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