The Rato R80 is a 79 cc (4.8 cu-in) single-cylinder air-cooled 4-stroke internal combustion general-purpose gasoline engine with horizontal shaft manufactured by Chongqing RATO Holding (Group) CO., LTD. The R80 engine is ideal for the following applications: mini-tiller, pressure washer, generator.
The Rato R80 engine has a side-valve design; flat suction valve carburetor; recoil starter or electric starter and transistorized magneto ignition (TCI) system.
A 52.0 mm (2.05 in) cylinder bore and 37.0 mm (1.50 in) piston stroke give the Rato R80 motor a total of 79 cc of displacement. Compression ratio rating is 9.0:1. It produced 2.0 HP of horsepower at 3,600 rpm and 3.6 N·m (0.37 kg·m, 2.65 ft·lb) of torque at 2,500 rpm.
General information
| Engine Specifications | |
| Model | R80 |
| Type | 4-stroke, side valve, single cylinder |
| Displacement | 79 cm 3 (4.8 cu-in) |
| Max. horsepower | 2.0 HP at 3,600 rpm |
| Max. torque (crank PTO) | 3.6 N·m (0.37 kg·m, 2.65 ft·lb) at 2,500 rpm |
| Carburetor | Flat suction valve carburetor |
| Cooling system | Forced-air |
| Ignition system | Transistorized magneto ignition (TCI) |
| 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: | 9.0:1 | |
| Bore x Stroke | 52 X 37 mm (2.05 x 1.50 in) | |
| Cylinder Head | ||
| Warpage (limit) | 0.10 mm (0.004 in) | |
| Valve Arrangement: | OHV | |
| Valves: | 2 | |
Service Information
| Oil system | |
| Oil type | 4-stroke or an equivalent (SJ) |
| Recommended oil | SAE 10W-30, 15W-40 |
| Oil capacity | 0.35 L |
| Ignition system | |
| Spark plug | NGK:BPR6ES |
| Spark plug gap | 0.7-0.8 mm (0.028-0.031 in) |
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