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
Type4-stroke, side valve, single cylinder
Displacement79 cm 3 (4.8 cu-in)
Max. horsepower2.0 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
CarburetorFlat suction valve carburetor
Cooling systemForced-air
Ignition systemTransistorized magneto ignition (TCI)
Lubricating systemSplash
Starting systemRecoil / electric starter
Stoping systemIgnition primary circuit ground
Fuel usedUnleaded gasoline (octane number 86 or higher)
PTO shaft rotationCounterclockwise (from PTO shaft side)

Cylinder Block and Head

Cylinder block
Compression ratio:9.0:1
Bore x Stroke52 X 37 mm (2.05 x 1.50 in)
Cylinder Head
Warpage (limit)0.10 mm (0.004 in)
Valve Arrangement:OHV

Service Information

Oil system
Oil type4-stroke or an equivalent (SJ)
Recommended oilSAE 10W-30, 15W-40
Oil capacity0.35 L
Ignition system
Spark plugNGK:BPR6ES
Spark plug gap0.7-0.8 mm (0.028-0.031 in)
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.

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