Kohler LV675

Kohler LV675The Kohler LV675 is a 674 cc (41.1 cu·in) natural aspirated V-twin four-stroke liquid-cooled internal combustion small gasoline engine with a vertical shaft from the Aegis series, manufactured by Kohler Co for general-purpose applications.

It has an 80.0 mm (3.15 in) cylinder bore and 67.0 mm (2.64 in) piston stroke. The compression ratio rating is 8.5:1.

This engine produced 23.3 PS (17.1 kW; 23.0 HP) at 3,600 rpm of horsepower and 44.0 N·m (4.5 kg·m, 32.4 ft·lb) at 2,400 rpm of torque.

The Kohler Aegis LV675 features:

  • OHV (overhaed valve) design
  • Hydraulic valve system
  • Electronic ignition system
  • Carburetor with fixed main jet and pulse fuel pump
  • Mechanical governor
  • Full pressure with Gerotor oil pump lubrication system
  • Liquid-cooled cooling system with parallel-flow radiator and integrated belt-driven water pump
  • Solenoid shift starter (12V)
  • 20A charging, regulated

General information

Engine Specifications
Engine model Aegis LV675
Engine type 4-stroke, OHV, V-twin
Displacement 674 cm3, (41.1 cu·in)
Max. horsepower 23.3 PS (17.1 kW; 23.0 HP) at 3,600 rpm
Max. torque 44.0 N·m (4.5 kg·m, 32.4 ft·lb) at 2,400 rpm
Cooling system Liquid-cooled
Air cleaner Dual-element
Lubricating system Full pressure with Gerotor oil pump
Ignition system Electronic ignition system
Fuel system Carburetor with fixed main jet
Fuel used Unleaded gasoline (octane number 86 or higher)
Starting system Solenoid shift starter (12V)
Charging system 20A charging, regulated
Governor Mechanical governor
PTO shaft rotation Counterclockwise (from PTO shaft side)
Dimensions (L x W X H) 451.0 x 479.3 x 472.4 mm (17.8 x 18.9 x 18.6 in)
Dry weight 49.8 kg (109.8 lbs)

Cylinder Block and Head

Cylinder block
Compression ratio: 8.5:1
Cylinder bore: 80.0 mm (3.15 in)
Piston stroke: 67.0 mm (2.64 in)
Cylinder internal diameter (standard): 80.000-80.025 mm (3.1496-3.1506 in)
Piston skirt outer diameter (standard): 79.963-79.981 mm (3.1481-3.1489 in)
Number of piston rings (compression / oil): 2/1
Connecting rod small end diameter (standard): 17.015-17.023 mm (0.6699-0.6702 in)
Piston pin diameter: 16.995-17.000 mm (0.6691-0.6693 in)
Side clearance (Top): 0.050-0.096 mm (0.002-0.0038 in)
Side clearance (Second): 0.030-0.076 mm (0.0012-0.003 in)
Side clearance (Oil): 0.046-0.196 mm (0.0018-0.0077 in)
Ring end gap (Top): 0.180-0.430 mm (0.0071-0.0169 in)
Ring end gap (Second): 0.250-0.460 mm (0.0098-0.0181 in)
Crankshaft main journal diameter: 40.913-40.935 mm (1.6107-1.6116 in)
Crankpin journal diameter: 35.955-35.973 mm (1.4155-1.4163 in)
Crankshaft center distance: 33.5 mm (1.32 in)
Cylinder head
Valve arrangement: OHV, gear driven
Valves: 2 (4 valves in total)
Valve head diameter (INTAKE): 33.370-33.630 mm (1.3138-1.324 in)
Valve head diameter (EXHAUST): 29.370-29.630 mm (1.1563-1.1665 in)
Valve face angle (INTAKE): 45°
Valve face angle (EXHAUST): 45°
Seat angle (INTAKE): 89°
Seat angle (EXHAUST): 89°
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)
Valve lift (min) (INTAKE): 8.88 mm (0.3496 in)
Valve lift (min) (EXHAUST): 8.88 mm (0.3496 in)
Camshaft journal diameter : 19.962-19.975 mm (0.7859-0.7864 in)

Tightening torque specs

Tightening torque specs
Intake manifold 6.2 Nm (0.63 kg·m; 4.58 ft·lb)
Carburetor mounting 6.2 Nm (0.63 kg·m; 4.6 ft·lb)
Connecting rod cap 11.3 Nm (1.15 kg·m; 8.3 ft·lb)
Oil drain plugs 13.6 Nm (1.4 kg·m; 10.0 ft·lb)
Cylinder head Step 1: 16.9 Nm (1.7 kg·m; 12.5 ft·lb)
Step 2: 33.9 Nm (3.5 kg·m; 25.0 ft·lb)
Rocker pivot Screw: 11.3 Nm (1.1 kg·m; 8.34 ft·lb)
Nut: 15.8 Nm (1.6 kg·m; 11.66 ft·lb)
Starter mounting 15.3 Nm (1.56 kg·m; 11.3 ft·lb)
Fan 13.6 Nm (1.4 kg·m; 10.0 ft·lb)
Flywheel 66.4 Nm (6.77 kg·m; 49 ft·lb)
Spark plug 27 Nm (2.75 kg·m; 19.93 ft·lb)
Muffler retaining nuts 24.4 Nm (2.5 kg·m; 18.0 ft·lb)
Valve cover 6.2 Nm (0.63 kg·m; 4.6 ft·lb)
Governor control lever 9.9 Nm (1.0 kg·m; 7.3 ft·lb)

Service Data

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 wirh Gerotor oil pump
Oil type: SAE 10W-30
Recommended oil: API SG, SH, SJ, or higher
Oil capacity: 1.9 L (2.01 US. qt, 1.67 Imp. qt.)
Fuel system
Type: Carburetor with fixed main jet
Fuel pump: Pulse type
Fuel delivery (min): 7.5 L/h (2 gal/h) with a pressure at 0.3 psi
Fuel filter: In-line
Ignition system
Type: Electronic ignition system
Spark plug: Champion RC14YC or Kohler 6613201-S
Spark plug gap: 0.76 mm (0.030 in)
Spark plug torque: 27 N·m (2.8 kg·m, 19.9 ft·lb)
Ignition module air gap: 0.20-0.30 mm (0.008-0.012 in)
Cooling system
Cooling system: Liquid-cooled cooling system with parallel-flow radiator and integrated belt-driven water pump
Coolant capacity: 1.4 liters (1.5 US.qts, 1.243 Imp. qts)


Manufacturer or Brand Models
Lawn tractors
Craftsman 917.27524


1. Kohler Aegis 17,20,23 HP liquid-cooled vertical crankshaft service manual. Kohler Co.

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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