Rato RV340

Rato RV340 vertical shaft engineThe Rato RV340 is a 340 cc (20.75 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 Rato RV340 engine has a single-cylinder with a vertical PTO-shaft; an overhead valve (OHV) design; flat suction valve carburetor; dual element air filtration system; Capacitance Discharge Type ignition system (CDI); centrifugal mechanical governor system and electric starter.

The Rato RV340 motor has an 88.0 mm (3.46 in) cylinder bore and 56.0 mm (2.20 in) piston stroke with a compression ratio of 8.5:1. It produced 13.0 HP at 3,600 rpm of horsepower and 11 N·m (1.12 kg·m, 8.11 ft·lb) at 2,500 rpm of torque.

General information

Engine Specifications
Model RV340
Type 4-stroke, OHV, single cylinder
Displacement 340 cm 3 (20.75 cu-in)
Max. horsepower 13.0 HP at 3,600 rpm
Max. torque (crank PTO) 11 N·m (1.12 kg·m, 8.11 ft·lb) at 2,500 rpm
Carburetor Flat suction valve carburetor
Cooling system Forced-air
Ignition system Capacitance Discharge Type (CDI)
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)
Oil system
Oil type 4-stroke or an equivalent (SJ)
Recommended oil SAE 10W-30, 15W-40
Oil capacity 1.1 L
Ignition system
Spark plug NGK: BPR6ES
Spark plug gap 0.7-0.8 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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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. Hello.
    From Denmark: Do you ship to Denmark?
    I need a starter for Rato RV340, vertical shaft.
    What is the price incl vat and shipping?

  2. hi im looking for a coil n a stater [charging] or part no n price please rv340cc z321100506001 thanks

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