Rato RV175

Rato RV175The Rato RV175 is a 173.9 cc (10.61 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 RV175 engine has a single-cylinder with a vertical shaft; an overhead valve (OHV) design; flat suction valve carburetor; recoil starter or electric starter, transistorized magneto ignition system and centrifugal mechanical governor system.

A 70.0 mm (2.76 in) cylinder bore and 45.2 mm (1.78 in) piston stroke give the Rato RV175 motor a total of 173.9 cc of displacement. Compression ratio rating is 8.3:1. It produced 3.0 kW at 3,600 rpm of horsepower and 9.5 N·m (0.97 kg·m, 7.0 ft·lb) at 2,500 rpm of torque.

General information

Engine Specifications
Model RV175
Type 4-stroke, OHV, single cylinder
Displacement 173.9 cm 3 (10.61 cu-in)
Max. horsepower 3.0 kW at 3,600 rpm
Max. torque (crank PTO) 9.5 N·m (0.97 kg·m, 7.0 ft·lb) at 2,500 rpm
Carburetor Flat suction valve carburetor
Cooling system Forced-air
Ignition system Transistorized magneto
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)

Service Information

Oil system
Oil type 4-stroke or an equivalent (SJ)
Recommended oil SAE 10W-30, 15W-40
Oil capacity 0.6 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. Greetings,

    I would like to know how I can buy a Rato RV 175 motor / electric starting

  2. Looking for a diagram to adjust the governor on this thing and to either replace/upgrade/or repair the current carb because the thing just turns fires up, and shits right back off. And I can’t find any parts or info for it. Any help?

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