Kohler SV730

Kohler SV730The Kohler SV730 is a 725 cc (44.24 cu·in) natural aspirated V-twin four-stroke air-cooled internal combustion gasoline engine with a vertical shaft, from the Courage series, manufactured by Kohler Co for general-purpose applications.

The cylinder bore is 83.0 mm (3.27 in) and the piston stroke is 67.0 mm (2.64 in). The compression ratio rating is 9.0:1.

The Kohler SV730 engine produced 25.3 PS (18.6 KW; 25.0 HP) at 3,600 rpm of maximum output power and 60.7 Nm (6.2 kg·m; 44.8 ft·lb) at 2,200 rpm of peak torque.

The Kohler SV730 features:

  • OHV design
  • Aluminum head and crankcase with cast-iron cylinder liner
  • Fixed Ignition System, Digital Spark Advance Ignition (DSAI), Digital Spark Advance Module (DSAM) ignition system
  • Carburetor with fixed main jet (Keihin, Nikki or Walbro)
  • Full-pressure lubrication lubrication system with oil filter and bypass valve
  • Forced air cooling system
  • Electric starter

General information

Engine Specifications
Engine model Courage SV730
Engine type 4-stroke, OHV, V-twin
Displacement 725 cm3, (44.24 cu·in)
Max. horsepower 25.3 PS (18.6 KW; 25.0 HP) at 3,600 rpm
Max. torque 60.7 Nm (6.2 kg·m; 44.8 ft·lb) at 2,200 rpm
Cooling system Forced air
Air cleaner Replaceable, paper element
Lubricating system Pressurized lubrication
Ignition system Fixed Ignition System,
Digital Spark Advance Ignition (DSAI),
Digital Spark Advance Module (DSAM)
Fuel system Carburetor with fixed main jet (Keihin, Nikki or Walbro)
Fuel consumption
Fuel tank capacity
Fuel used Unleaded gasoline (octane number 86 or higher)
Starting system Electric starter
Dimensions (L x W X H) 470 x 452 x 340 mm (18.5 x 17.8 x 13.4 in)
Dry weight 41.3 kg (91.1 lbs)

Cylinder Block and Head

Cylinder block
Compression ratio: 9.0:1
Cylinder bore: 83.0 mm (3.27 in)
Piston stroke: 67.0 mm (2.64 in)
Cylinder internal diameter (standard): 83.006-83.031 mm (3.2679-3.2689 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)
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
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 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)

Service Data

Valve clearance
Intake valve clearance: 0.101-0.152 mm (0.004-0.006 in)
Exhaust valve clearance: 0.101-0.152 mm (0.004-0.006 in)
Oil system
Lubrication system: Pressurized lubrication
Oil type: SJ or higher
Recommended oil: SAE 10W-30
Oil capacity: 1.6 L (1.69 US. qt, 1.41 Imp. qt.)
Ignition system
Type: Fixed Ignition System,
Digital Spark Advance Ignition (DSAI),
Digital Spark Advance Module (DSAM)
Spark plug: Champion RC12YC
Spark plug gap: 0.76 mm (0.0299 in)
Spark plug torque: 27 N·m (2.8 kg·m, 19.9 ft·lb)

Tightening Torque Specs

Valve clearance
Cylinder Head Flange Nut 16.9-33.9 Nm (12.5-25 ft-lbs)
Cylinder Head Bolt 22.6-41.8 Nm (16.7-30.8 ft-lbs)
Rocker Arm Screw 11.3 Nm (8.3 ft-lbs)
Connecting Rod Cap 22.7 Nm (16.7 ft-lbs.)
Flywheel Retaining Screw 66.4 Nm (49 ft-lbs)
Intake Manifold Mounting 7.4 Nm (5.5 ft-lbs)
Carburetor Mounting Nut 6.2-7.3 Nm (4.6-5.4 ft-lbs.)
Oil Drain Plug 13.6 Nm (10 ft-lbs.)
Oil Pan 24.4 Nm (18 ft-lbs.)
Governor Lever Nut 6.8 Nm (5 ft-lbs.)
Ignition Module 4.0-6.2 Nm (2.9-4.6 ft-lbs.)
Oil Filter 10.4-12.7 Nm (7.5-9.2 ft-lbs.)

Applications

Manufacturer or Brand Models
Lawn tractors
Cub Cadet SLT1550, SLTX1050, SLTX1054
Husqvarna LGT2554
Zero-turn mowers
Cub Cadet RZT 50 KH

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