Rato R80

Rato R80The 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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