Rato RV150

Rato RV150The Rato RV150 is a 150 cc (8.54 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 for lawn mowers and tillers

The Rato RV150 engine has a single-cylinder with a vertical shaft; an overhead valve (OHV) design; flat suction valve carburetor; dual element air filtration system; capacitance discharge type or inductance discharge type ignition system; centrifugal mechanical governor system and recoil starter.

The Rato RV150 motor has a 65.0 mm (2.56 in) cylinder bore and 45.0 mm (1.77 in) piston stroke with a compression ratio of 8.5:1. It produced 2.5 kW at 3,600 rpm of horsepower and 7.8 N·m (0.79 kg·m, 4.42 ft·lb) at 2,500 rpm of torque.

General information

Engine Specifications
Type4-stroke, OHV, single cylinder
Displacement150 cm 3 (9.15 cu-in)
Max. horsepower2.5 kW at 3,600 rpm
Max. torque (crank PTO)7.8 N·m (0.79 kg·m, 4.42 ft·lb) at 2,500 rpm
CarburetorFlat suction valve carburetor
Cooling systemForced-air
Ignition systemCapacitance discharge type or inductance discharge type
Lubricating systemSplash
Starting systemRecoil starter
Stoping systemIgnition primary circuit ground
Fuel usedUnleaded gasoline (octane number 86 or higher)
Fuel tank capacity0.8 L
PTO shaft rotationCounterclockwise (from PTO shaft side)

Service Information

Oil system
Oil type4-stroke or an equivalent (SJ)
Recommended oilSAE 10W-30, 15W-40
Oil capacity0.55 L
Ignition system
Spark plugNGK: BPR6ES
Spark plug gap0.7-0.8 mm (0.028-0.031 in)
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We try to use verified sources and official documentation, however, differences between sources or errors in entering information may occur. We do not provide advice on technical issues related to the engines operation or repair. We do not recommend using provided information for engines repairing engines or spare parts ordering, use only official service manuals and spare-parts catalogs.


  1. My mower was new in august n having starting problems already it will not start any suggestions other than manual??

    • Mine is the Canadian Tire Certified brand… only used about 6 times………same engine,same problem.
      The air filter gets soaked with oil and gas and has to be replaced. at a cost of $27.00 for the air filter. Very badly designed engine.
      Buy something with a Briggs & stratton engine .my last one lasted 22 years.

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