Torx TX390

Torx TX390 engineThe Torx TX390 is a 0.4 L (390 cc, 23.8 cu·in) natural aspirated single-cylinder four-stroke air-cooled internal combustion small gasoline engine with a horizontal shaft. The TX390 engine is used motor pumps, lawn cutting equipment, shredders, high-pressure washer, hydraulic pumps, and drive units.

The Torx TX390 engine has a single-cylinder, overhead valve (OHV) design for increased efficiency and optimal power transfer, and recoil starter. This engine used a horizontal type carburetor, transistorized magneto ignition system, splash type lubricating system and forced-air cooling system. The TX390 is equipped with a 6.5 L (1.72 US. gal. 1.43 Imp. gal.) fuel tank.

The Torx TX390 engine produced 12.9 PS (9.5 kW; 12.7 HP) at 3,600 rpm of maximum output power and 22.0 N·m (2.2 kg·m, 16.2 ft·lb) at 2,700 rpm of peak torque.

General information

Engine Specifications
Engine modelTX390
Engine type4-stroke, OHV, single-cylinder
Displacement390 cm3, (23.8 cu·in)
Max. horsepower13.0 PS (9.5 kW; 13.0 HP) at 3,600 rpm
Max. torque22.0 N·m (2.2 kg·m, 16.2 ft·lb) at 2,700 rpm
Cooling systemForced air
Lubricating systemSplash
Fuel systemCarburetor
Fuel tank capacity6.5 L (1.72 US. gal. 1.43 Imp. gal.)
Fuel usedUnleaded gasoline (octane number 86 or higher)
Starting systemRecoil starter
Stoping systemIgnition primary circuit ground
GovernorCentrifugal govervor
PTO shaft rotationCounterclockwise (from PTO shaft side)
Dry weight31.0 kg (68.3 lbs)

Cylinder Block and Head

It has an 88.0 mm (3.46 in) cylinder bore and 64.0 mm (2.52 in) piston stroke. Compression ratio rating is 8.0:1.

Cylinder block
Compression ratio:8.0:1
Cylinder bore:88.0 mm (3.46 in)
Piston stroke:64.0 mm (2.52 in)
Number of piston rings (compression / oil):2/1
Crankshaft center distance:32 mm (1.26 in)
Cylinder head
Valve arrangement:OHV

Service Data

The 4-stroke motor oil with a viscosity of SAE 10W-30 is recommended for the TX390, refilling oil capacity is 1.1 L (1.16 US. qt, 0.97 Imp. qt.).

Oil system
Lubrication system:Splash
Oil capacity:1.1 L (1.16 US. qt, 0.97 Imp. qt.)
Fuel system
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.

ATTENTION! Dear visitors, this is an informational database of technical specifications, we are not a parts supplier or a marketplace.

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.

Be the first to comment

Leave a Reply

Your email address will not be published.