The Rato RV160 is a 163 cc (9.9 cu-in) single-cylinder air-cooled 4-stroke internal combustion general-purpose gasoline engine with vertical shaft, manufactured by Chongqing RATO Holding (Group) CO., LTD. The RV160 emgine is used for lawn mowers, pressure washers and tillers.
The Rato RV160 engine has a single-cylinder with a vertical shaft; an overhead valve (OHV) design; flat suction valve carburetor; recoil starter or electric starter, Capacitance Discharge Type or Inductance Discharge Type ignition system and centrifugal mechanical governor system.
A 68.0 mm (2.68 in) cylinder bore and 45.0 mm (1.77 in) piston stroke give the Rato RV160 motor a total of 163 cc of displacement. Compression ratio rating is 8.5±0.3:1. It produced 5.5 HP at 3,600 rpm of horsepower and 8.8 N·m (0.89 kg·m, 6.49 ft·lb) at 2,500 rpm of torque.
General information
| Engine Specifications | |
| Model | RV160 |
| Type | 4-stroke, OHV, single cylinder |
| Displacement | 163 cm 3 (9.9 cu-in) |
| Max. horsepower | 5.5 HP at 3,600 rpm |
| Max. torque (crank PTO) | 8.8 N·m (0.89 kg·m, 6.49 ft·lb) at 2,500 rpm |
| Carburetor | Flat suction valve carburetor |
| Cooling system | Forced-air |
| Ignition system | Capacitance Discharge Type or Inductance Discharge Type |
| Lubricating system | Splash |
| Starting system | Recoil / electric starter |
| Stoping system | Ignition primary circuit ground |
| Fuel used | Unleaded gasoline (octane number 86 or higher) |
| PTO shaft rotation | Counterclockwise (from PTO shaft side) |
Cylinder Block and Head
| Cylinder block | ||
| Compression ratio: | 8.5:1 | |
| Bore x Stroke | 68 X 45 mm (2.68 x 1.77 in) | |
| Sleeve internal diameter | 68.00 mm (2.6771 in) | |
| Piston skirt outer diameter | 67.985 mm (2.6766 in) | |
| Number of piston rings (compression / oil): | 2 / 1 | |
| Connecting rod small end ID | 18.005 mm (0.7087 in) | |
| Connecting rod big end ID | 30.02 mm (1.182 in) | |
| Crankshaft crank pin outer diameter | 29.980 mm (1.180 in) | |
| Cylinder Head | ||
| Warpage (limit) | 0.10 mm (0.004 in) | |
| Valve Arrangement: | OHV | |
| Valves: | 2 | |
| Stem outer diameter (standard): | INTAKE | 5.480 mm (0.216 in) |
| EXHAUST | 5.440 mm (0.214 in) | |
| Cam height: | INTAKE | 27.70 mm (1.090 in) |
| EXHAUST | 27.75 mm (1.093 in) | |
| Valve spring free length: | 34.0 mm (1.3386 in) | |
| Camshaft journal diameter: | 13.984 mm (0.5505 in) | |
Service Information
| Engine | |
| Maximum speed | 3400 ± 100 rpm |
| Idle speed | 1900 ± 150 rpm |
| Cylinder compression | 14.0 kg/cm2 at 1400 rpm |
| Valve clearance | |
| Intake valve clearance | 0.15±0.02 mm (0.006±0.001 in) |
| Exhaust valve clearance | 0.20±0.02 mm (0.008±0.001 in) |
| Oil system | |
| Oil type | 4-stroke or an equivalent (SJ) |
| Recommended oil | SAE 10W-30, 15W-40 |
| Oil capacity | 0.6 L |
| Carburetor | |
| Main jet | #65 |
| Float height | 13.7 mm (0.54 in) |
| Pilot screw opening | 2-5/8 turns out |
| Ignition system | |
| Spark plug | NGK: BPR6ES |
| Spark plug gap | 0.7-0.8 mm (0.028-0.031 in) |
| Primary ignition coil resistance | 0.8-1.0 Ω |
| Secondary ignition coil resistance | 5.9-7.2 kΩ |
| Ignition coil air gap | 0.4 ± 0.2 (0.016 ± 0.008) |
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