Yamaha MZ200

Yamaha MZ200The Yamaha MZ200 is a 192 cc (11.7 cu-in) single-cylinder air-cooled 4-stroke internal combustion general-purpose gasoline engine with horizontal shaft manufactured by Yamaha Motor Co., Ltd.

The Yamaha MZ200 engine has an OHV (overhead valve) design; float type carburetor; centrifugal flyweight governor; mechanical splashing lubrication system; Transistor Controlled Ignition (T.C.I.) and recoil or electrical (option) starter. The Yamaha MZ200 used aluminum cylinder block with the spiny cast-iron sleeve. For exhaust valve used high heat resistant SUH3 steel.

The cylinder bore is 70.0 mm (2.75 in) and the piston stroke is 50.0 mm (1.97 in), compression ratio rating is 8.5:1. The engine produced 5.7 PS (4.2 kW) at 3,600 rpm of maximum horsepower and 4.8 PS (3.5 kW) at 3,600 rpm of continuous rated power. Maximum torque is 12.3 N·m (1.25 kg·m, 9.07 ft·lb) at 2,400 rpm.

General information

Engine Specifications
ModelMZ200
Type4-stroke, OHV, single cylinder
Displacement192 cm 3 (11.7 cu-in)
Max. horsepower5.7 PS (4.2 kW) at 3,600 rpm
Max. torque (crank PTO)12.3 N·m (1.25 kg·m, 9.07 ft·lb) at 2,400 rpm
CarburetorFloat type
Cooling systemForced-air
Ignition systemTransistor Controlled Ignition (T.C.I.)
Lubricating systemMechanical splashing
Starting systemRecoil or Electrical (option)
Fuel usedUnleaded gasoline (octane number 86 or higher)
Fuel tank capacity4.0 L (1.06 US Gal, 0.88 Imp Gal.)
PTO shaft rotationCounterclockwise (from PTO shaft side)

Dimensions and Weight

Yamaha MZ200
Length, mm (in)318 (12.5)
Width, mm (in)352 (13.8)
Height, mm (in)370 (14.6)
Dry weight, kg (lb)18.0 (37.5)

Service Information

Valve clearance
Intake valve clearance0.10 mm (0.004 in)
Exhaust valve clearance0.10 mm (0.004 in)
Oil system
Oil typeYamalube 4-stroke or an equivalent (SE or SF)
Recommended oilSAE 10W-30, 10W-40
Oil capacity0.6 L (0.63 US. qt, 0.53 Imp. qt.)
Ignition system
Spark plugNGK: BPR4ES
Spark plug gap0.7-0.8 mm (0.028-0.031 in)
T.C.I. air gap0.4 ± 0.2 (0.016 ± 0.008)
Spark plug tightening torque20 N·m (2.0 kg·m, 14 ft·lb)
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