The 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
| Engine | |
| 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) |
Applications
| Manufacturer or Brand | Models |
| Lawn tractors | |
| Craftsman | 917.27344, 917.27524 |
References
1. Kohler Aegis 17,20,23 HP liquid-cooled vertical crankshaft service manual. Kohler Co.
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