Kohler KT19

Kohler KT19The Kohler KT19 is a 770 cc, (46.98 cu·in) natural aspirated two-cylinders four-stroke air-cooled internal combustion small gasoline engine with a horizontal shaft, for general-purpose applications.

Cylinder bore is 79.25 mm (3.12 in) and piston stroke is 77.7 mm (3.06 in). The Kohler KT19 engine produced 19.3 PS (14.2 KW; 19.0 HP) at 3,600 rpm of maximum output power.

The Kohler KT19 features:

  • L-head design
  • Battery ignition system
  • Kohler or Walbro carburetor
  • Centrifugal governor
  • Pressure lubrication system with oil filter
  • Forced air cooling system
  • Electric starter

The Kohler KT19 suffix (engine is available with the following options):

  • S – Electric starter;
  • G – Tapered crankshaft;
  • P – Threaded crankshaft;
  • EP – Electric plant;
  • Q – Quilet model;

General information

Engine Specifications
Engine modelKT19
Engine type4-stroke, L-head, V-twin
Displacement770 cm3, (46.98 cu·in)
Max. horsepower19.3 PS (14.2 KW; 19.0 HP) at 3,600 rpm
Max. torque
Cooling systemForced air
Air cleanerReplaceable, paper element
Lubricating system KT19 (49199 and lower): Pressurized spray system
KT19 Series II (49200 and higher): Full-pressure system
Ignition systemBattery ignition system
Fuel systemKohler or Walbro carburetor
Fuel consumption
Fuel tank capacity
Fuel usedGasoline (octane number 86 or higher)
Starting systemElectric starter, 12V
GovernorCentrifugal governor
PTO shaft rotationCounterclockwise (from PTO shaft side)
Dimensions (L x W X H)
Dry weight54.9 kg (121 lbs)

Cylinder Block and Head

Cylinder block
Compression ratio:
Cylinder bore:79.25 mm (3.12 in)
Piston stroke:77.7 mm (3.06 in)
Cylinder internal diameter (standard):79.375 mm (3.125 in)
Piston skirt outer diameter (standard):79.159 mm (3.116 in)
Number of piston rings (compression / oil):2/1
Side clearance (Top):0.051-0.200 mm (0.002-0.004 in)
Side clearance (Second):0.025-0.077 mm (0.001-0.003 in)
Side clearance (Oil):0.025-0.077 mm (0.001-0.003 in)
Ring end gap (Top):0.2530-0.5820 mm (0.01-0.0229 in)
Ring end gap (Second):0.2530-0.5820 mm (0.01-0.0229 in)
Crankshaft main bearing (new):44.226-44.252 mm (1.7412-1.7422 in)
Crankpin diametr: KT19: 34.882-34.895 mm (1.3733-1.3738 in)
KT19 Series II: 38.082-38.095 mm (1.4993-1.4998 in)
Cylinder head
Valve arrangement:L-head
Valves:2,(4 valves in total)
Valve head diameter (INTAKE):34.798-35.052 mm (1.370-1.380 in)
Valve head diameter (EXHAUST):34.798-35.052 mm (1.370-1.380 in)
Valve Minimum Lift-Zero Lash (INTAKE):7.11 mm (0.280 in)
Valve Minimum Lift-Zero Lash (EXHAUST):7.11 mm (0.280 in)

Tightening torque settings:

  • Cylinder Head: 20.0-27.0 Nm; 15.0-20.0 ft·lb;
  • Connecting Rods (New): 16.0 Nm; 12.0 ft·lb;
  • Connecting Rods (Used): 11.0 Nm; 8.3 ft·lb;
  • Flywheel Screw: 54.0 Nm; 40.0 ft·lb;
  • Manifold Screw/Nut: 17 Nm; 12.5 ft·lb;
  • Spark Plugs: 14-20 Nm; 1.4-2 kgf·m; 10.3-14.8 ft·lb

Service Data

Valve clearance
Intake valve clearance:0.076-0.152 mm (0.003-0.006 in)
Exhaust valve clearance:0.278-0.354 mm (0.011-0.014 in)
Oil system
Lubrication system: KT19 (49199 and lower): Pressurized spray system
KT19 Series II (49200 and higher): Full-pressure system
Oil type:SF or SG
Recommended oil:5W-20, 5W-30, 10W-30, 10W-40
Oil capacity:1.4 L (1.48 US. qt, 1.23 Imp. qt.)
Oil pressure:More then 3.5 kg/cm2, 50 psi
Fuel system
Fuel pump typeMechanical
Fuel filter typeIn-line
Type:Kohler or Walbro carburetor
Main fuel: Kohler: 2-1/2 turns
Walbro (fixed jet): Not adjust
Walbro (adjustable jet): 1 turn
Low idle: Kohler: 1 turn
Walbro: 1-1/4 turns
Ignition system
Type:Battery ignition system
Spark plug:Champion RV15YC, RBL15Y
Spark plug gap:0.635 mm (0.025 in)
Spark plug torque:14-20 Nm; 1.4-2 kgf·m; 10.3-14.8 ft·lb
Breaker point gap0.432-0.580 mm (0.017-0.023 in)


1. Kohler twin cylinder engines: Models KT17&KT19 Series II and models KT17, KT19, KT21 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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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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