Yamaha MA175

Yamaha MA175The Yamaha MA175 is a 174 cc (10.6 cu-in) single-cylinder air-cooled 4-stroke internal combustion general-purpose gasoline engine with vertical shaft manufactured by Yamaha Motor Co., Ltd.

The Yamaha MA175 engine has a low-profile OHC (overhead cam) system with steel chain drive for optimized engine size and durability; hemispherical head with angled intake/exhaust valves; cast-iron cylinder line; float type carburetor; transistorized ignition system (T.C.I.).

The cylinder bore is 68.0 mm (2.67 in) and the piston stroke is 49.0 mm (1.89 in), compression ratio rating is 8.5:1. The engine produced 4.5 PS (3.4 kW) at 3,600 rpm of maximum horsepower. Maximum torque is 10.0 N·m (1.02 kg·m, 7.38 ft·lb) at 2,400 rpm.

General information

Engine Specifications
Model MA175
Type 4-stroke, OHV, single cylinder
Displacement 174 cm 3 (10.6 cu-in)
Max. horsepower 4.5 PS (3.4 kW) at 3,600 rpm
Max. torque (crank PTO) 10.0 N·m (1.02 kg·m, 7.38 ft·lb) at 2,400 rpm
Carburetor Float type
Cooling system Forced-air
Ignition system Transitorized (T.C.I.)
Lubricating system Mechanical splashing
Starting system Recoil
Fuel used Unleaded gasoline (octane number 86 or higher)
Fuel tank capacity 1.2 L
PTO shaft rotation Counterclockwise (from PTO shaft side)

Dimensions and Weight

Yamaha MA175
Length, mm (in) 415 (16.3)
Width, mm (in) 360 (14.2)
Height, mm (in) 270 (10.6)
Dry weight, kg (lb) 12.5 (27.6)

Service Information

Oil system
Oil type Yamalube 4-stroke or an equivalent (SE or SF)
Recommended oil SAE 10W-30, 10W-40
Oil capacity 0.5 L (0.53 US. qt)
Ignition system
Spark plug NGK: BPR7HS
Spark plug gap 0.7-0.8 mm (0.028-0.031 in)
Spark plug tightening torque 20 N·m (2.0 kg·m, 14 ft·lb)
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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