The Yamaha MA190 is a 189 cc (11.5 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 MA190 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 52.0 mm (2.05 in), compression ratio rating is 8.5:1. The engine produced 5.0 PS (3.7 kW) at 3,600 rpm of maximum horsepower. Maximum torque is 11.2 N·m (1.14 kg·m, 8.26 ft·lb) at 2,400 rpm.
General information
| Engine Specifications | |
| Model | MA190 |
| Type | 4-stroke, OHV, single cylinder |
| Displacement | 189 cm 3 (11.5 cu-in) |
| Max. horsepower | 5.0 PS (3.7 kW) at 3,600 rpm |
| Max. torque (crank PTO) | 11.2 N·m (1.14 kg·m, 8.26 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 MA190 | |
| Length, mm (in) | 425 (16.7) |
| Width, mm (in) | 360 (14.2) |
| Height, mm (in) | 270 (10.6) |
| Dry weight, kg (lb) | 14.0 (30.9) |
Service Information
| Oil system | |
| Oil type | Yamalube 4-stroke or an equivalent (SE or SF) |
| Recommended oil | SAE 10W-30, 10W-40 |
| Oil capacity | 0.6 L (0.63 US. qt, 0.53 Imp. 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:
Dear sir/mam,
Greetings. . .
This is Arnold Data of Grand Base Ent & Technical Services, frm Manila , Philippines. I would like to inquire about your Yamaha Gas Engine with model MA190. May inknownthe price of this unit and how can i order? Please consider me as your dealer here.
Thanks & best regards,
Arnold Data
Grand Base Ent & Technical Services
No 247-A Ermin Garcia St, Brgy. Silangan,
Cubao, Quezon City, Philippines, 1109
Tel No 638-9129917
Mobile No: 63917-5033894
Email Add: [email protected]
Wechat: Arnold 032158
I would like to see the power and torque curves (as function of engine speed) because I intend to operate at steady state in the 1600-2200 rpm range.
I’m searching for a new pump for my Yamaha ma190.
I need to know the size and the pump to get this pump replaced.