Kohler TH16

Kohler TH16The Kohler TH16/TH16S is a 519 cc (31.7 cu·in) V-twin air-cooled four-stroke internal combustion gasoline engine from the Triad series, manufactured by Kohler Co.

The Kohler TH16 engine has an OHC (overhead camshaft) design, an aluminum block with cast iron cylinder liners, a horizontal PTO-shaft, fuul-pressurized lubrication system, replaceable high-density paper air cleaner. This engine is equipped with a carburetor with a fixed main jet, electronic ignition system (CDI).

A 73.0 mm (2.87 in) cylinder bore and 62.0 mm (2.44 in) piston stroke give the TH16 engine a total of 519 cc of displacement. The compression ratio rating is 7.8:1.

This engine produced 16.2 PS (11.9 KW; 16.0 HP) at 3,600 rpm of horsepower and 35.5 Nm (3.62 kg·m; 26.2 ft·lb) at 2,500 rpm of torque.

The breakdown of the engine code is as follows:

  • T – Triad series
  • H – Horizontal PTO shaft
  • 16 – 16.0 HP
  • Version code:
    • S – Electric start

General information

Engine Specifications
ModelTriad TH16 / TH16S
Type4-stroke, OHV, V-twin
Displacement519 cm 3 (31.7 cu-in)
Max. horsepower16.2 PS (11.9 KW; 16.0 HP) at 3,600 rpm
Max. torque35.5 Nm (3.62 kg·m; 26.2 ft·lb) at 2,500 rpm
Fuel systemCarburetor with a fixed main jet
Cooling systemForced-air
Ignition systemElectronic ignition (CDI)
Lubricating systemFull-pressure lubrication
Starting systemRecoil or electic starter
Fuel usedUnleaded gasoline (octane number 86 or higher)
Dimensions (L x W X H)328 x 400 x 449 mm (12.9 x 15.7 x 17.7 in)
Dry weight43.0 kg (90.0 lbs)

Cylinder Block and Head

Cylinder block
Compression ratio:7.8:1
Bore x Stroke73.0 mm X 62.0 mm (2.87 x 2.44 in)
Sleeve internal diameter73.030-73.031 mm (2.8742-2.8752 in)
Number of piston rings (compression / oil):2 / 1
Thrust face outer diameter72.966-72.984 mm (2.8727-2.8734 in)
Piston pin outer diameter16.996-17.000 mm (0.6691-0.6693 in)
Ring-to-groove side clearance:Top0.040-0.085 mm (0.0016-0.0033 in)
Second0.030-0.080 mm (0.0012-0.0031 in)
Oil0.046-0.201 mm (0.0018-0.0079 in)
Ring end gap:Top0.180-0.380 mm (0.0071-0.0150 in)
Second0.180-0.440 mm (0.0071-0.0173 in)
Crankshaft main journal diameter:45.021-45.041 mm (1.7725-1.7735 in)
Crankpin journal diameter:31.948-31.966 mm (1.5338-1.2193 in)
Cylinder Head
Valve Arrangement:OHC, belt driven
Valves:2 (4 in total)
Valve head diameter:INTAKE29.180-29.430 mm (1.1488-1.1586 in)
EXHAUST26.300-26.700 mm (1.0354-1.0512 in)
Stem outer diameter:INTAKE5.982-6.000 mm (0.2355-0.2362 in)
EXHAUST5.970-5.988 mm (0.2350-0.2357 in)

Tightening torque specs

Tightening torque specs
Connecting rod11.3 Nm (1.2 kgf·m; 8.3 ft·lb)
Oil drain plug16.3 Nm (1.7 kgf·m; 12.0 ft·lb)
Oil filter5.6-9.0 Nm (0.6-0.9 kgf·m; 4.1-6.6 ft·lb)
Muffler retaining nuts24.4 Nm (2.5 kgf·m; 18 ft·lb)
Valve cover5.6 Nm (0.6 kgf·m; 4.1 ft·lb)
Flywheel66.4 Nm (6.77 kg·m; 49 ft·lb)
Spark plug24.4-29.8 Nm (2.5-3 kgf·m; 18-22 ft·lb)

Service Information

Valve clearance
Intake0.013-0.064 mm (0.0005-0.0025 in)
Exhaust0.076-0.127 mm (0.0030-0.0050 in)
Oil system
Oil typeAPI SG, SH, SJ, or higher
Recommended oilSAE 10W-30
Oil capacity1.4 liters (1.48 US.qts, 1.23 Imp. qts)
Ignition system
Spark plugChampion RC12YC
Spark plug gap0.76 mm (0.030 in)
Ignition module air gap0.200-0.300 mm (0.0079-0.0118 in)
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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