The Torx TX160 is a 159 cc (9.7 cu-in) single-cylinder air-cooled 4-stroke internal combustion general-purpose gasoline engine with a vertical shaft. 
The Torx TX160 engine has a single-cylinder with a vertical shaft, an overhead valve (OHV) design, horizontal carburetor, and recoil starter.
The Torx TX160 motor has a 65.0 mm (2.56 in) cylinder bore and 48.0 mm (1.89 in) piston stroke with a compression ratio of 8.5:1.
It produced 5.0 PS (3.7 kW; 5.0 HP) at 3,600 rpm of horsepower and 7.0 N·m (0.7 kg·m, 5.2 ft·lb) at 3,000 rpm of torque.
General information
| Engine Specifications | |
| Model | TX160 | 
| Type | 4-stroke, OHV, single cylinder | 
| Displacement | 159 cm 3 (9.7 cu-in) | 
| Max. horsepower | 5.0 PS (3.7 kW; 5.0 HP) at 3,600 rpm | 
| Max. torque (crank PTO) | 7.0 N·m (0.7 kg·m, 5.2 ft·lb) at 3,000 rpm | 
| Carburetor | Horizontal type | 
| Cooling system | Forced-air | 
| Ignition system | – | 
| Lubricating system | Splash | 
| Starting system | Recoil starter | 
| Stoping system | Ignition primary circuit ground | 
| Fuel used | Unleaded gasoline (octane number 86 or higher) | 
| Fuel tank capacity | 1.0 L (0.26 US. gal. 0.22 Imp. gal.) | 
| PTO shaft rotation | Counterclockwise (from PTO shaft side) | 
Service Information
| Oil system | |
| Oil type | 4-stroke or an equivalent (SJ) | 
| Recommended oil | SAE 10W-30 | 
| Oil capacity | 0.55 L (0.58 US. qt, 0.48 Imp. qt.) | 
Hi, can I use Castrol GTX 20W-50 API oil in my Big Bad Wolf Mower.
Torx OHV series, VX 160.
where can I get torque settings for the cylinder head on the Torx TX160