Kohler ECH980

Kohler ECH980The Kohler ECH980 is a 999 cc (61.0 cu·in) natural aspirated V-twin four-stroke air-cooled internal combustion small gasoline engine from the Command PRO EFI series with a horizontal shaft, manufactured by Kohler Co for general-purpose applications.

A 90.0 mm (3.54 in) cylinder bore and 78.5 mm (3.09 in) piston stroke give the ECH980 engine a total of 999 cc of displacement. The compression ratio rating is 8.8:1.

The ECH980 engine produced 38.5 PS (28.3 KW; 38.0 HP) at 3,600 rpm of maximum horsepower and 78.6 Nm (8.0 kg·m; 58.0 ft·lb) at 3,400 rpm of maximum torque.

The Kohler ECH980 features:

  • OHV design
  • Hydraulic valve lifters
  • Aluminum cylinder block
  • Cast iron cylinder liners
  • Extra-large sleeve bearings
  • Electronic ignition system
  • EFI (Electronic Fuel Injection)
  • Full pressure lubrication system
  • Forced air cooling system
  • Electric starter
  • 20 amp charging system (15 amp stator with a 25 amp rectifier-regulator)

General information

Engine Specifications
Engine modelCommand PRO EFI ECH980
Engine type4-stroke, OHV, V-twin
Displacement999 cm3, (61.0 cu·in)
Max. horsepower38.5 PS (28.3 KW; 38.0 HP) at 3,600 rpm
Max. torque78.6 Nm (8.0 kg·m; 58.0 ft·lb) at 3,400 rpm
Cooling systemForced air
Air cleanerHigh-efficiency, heavy-duty air filters
Lubricating systemFull pressure
Ignition systemElectronic ignition system
Fuel systemEFI (Electronic Fuel Injection)
Fuel usedUnleaded gasoline (octane number 86 or higher)
Starting systemElectric starter
PTO shaft rotationCounterclockwise (from PTO shaft side)
Dimensions (L x W X H)402 x 484 x 600 mm (15.8 x 19.1 x 23.6 in)
Dry weight60.0 kg (132.0 lbs)

Cylinder Block and Head

Cylinder block
Compression ratio:8.8:1
Cylinder bore:90.0 mm (3.54 in)
Piston stroke:78.5 mm (3.09 in)
Cylinder internal diameter (standard):90.000-90.0025 mm (3.5433-3.5434 in)
Number of piston rings (compression / oil):2/1
Connecting rod big end diameter (standard):44.030-44.037 mm (1.7335-1.7337 in)
Thrust face outer diameter (standard):89.972 mm (3.5422 in)
Piston pin outer diameter (standard):19.995-20.000 mm (0.7872-0.7874 in)
Side clearance (Top):0.030-0.070 mm (0.0010-0.0026 in)
Side clearance (Second):0.030-0.070 mm (0.0010-0.0026 in)
Side clearance (Oil):0.060-0.190 mm (0.0022-0.0073 in)
Ring end gap (Top):0.125-0.304 mm (0.0049-0.0120 in)/td>
Ring end gap (Second):0.900-1.179 mm (0.0345-0.0464 in)
Crankshaft main journal diameter:44.978-45.000 mm (1.7708-1.7717 in)
Crankpin journal diameter:43.982-44.000 mm (1.7316-1.7323 in)
Cylinder head
Valve arrangement:OHV, gear driven
Valves:2 (4 valves in total)
Valve head diameter (INTAKE):38.625-38.685 mm (1.5207-1.523 in)
Valve head diameter (EXHAUST):31.625-31.825 mm (1.2451-1.253 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)
Camshaft lobe height (INTAKE):34.100 mm (1.3425 in)
Camshaft lobe height (EXHAUST):35.000 mm (1.378 in)
Camshaft journal diameter:19.962-19.975 mm (0.7859-0.7864 in)

Tightening torque specs

Tightening torque specs
Intake manifold mounting (torque in 2 increments) Step 1: 16.9 Nm (1.7 kgf·m; 12.5 lb·ft)
Step 2: 22.6 Nm (2.3 kgf·m; 16.7 lb·ft)
Connecting rod cap11.0 Nm (1.1 kgf·m; 8.1 lb·ft)
Cylinder head Bolt (torque in 2 increments):
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)
Flywheel69.8 Nm (7.1 kgf·m; 51.5 lb·ft)
Governor lever nut7.1 Nm (0.7 kgf·m; 5.2 lb·ft)
Muffler retaining nuts24.4 Nm (2.5 kg·m; 18.0 lb·ft)
Spark plug27.0 Nm (2.75 kg·m; 20.0 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 SJ or higher
Recommended oil:SAE 10W-30, KOHLER PRO 10W-50
Oil capacity: W/o oil filter: 1.9 liters (2.0 US.qts, 1.7 Imp. qts)
With oil filter: 2.6 liters (2.75 US.qts, 2.3 Imp. qts)
Fuel system
Type:EFI (Electronic Fuel Injection)
Fuel filter:In-line
Ignition system
Type:Electronic ignition system
Spark plug:Champion RC12YC or Champion XC12YC
Spark plug gap:0.76 mm (0.030 in)
Ignition coil air gap0.280-0.330 mm (0.011-0.013 in)


1. Kohler Command PRO EFI ECH940 & ECH980 service manual. Kohler Co. 2022.

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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