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Yamaha MZ200 Engine
General Technical Data
Yamaha MZ200 Engine Specifications
Engine Model ................ Yamaha MZ200
Engine Type ................ 4-cycle overhead valve 1-cylinder air-cooled small gasoline engine
Number of Cylinders ................ Single
Displacement, cu.in (cc) ................ 11.7 (192)
Cylinder Bore, in (mm) ................ 2.75 (70.0)
Piston Stroke, in (mm) ................ 1.97 (50.0)
Rated Engine Power, hp (kW) ................ 5.7 (4.2)
Rated Engine Speed, rpm ................ 3600
Maximum Torque, Nm (ft-lbs) ................ 12.3 (9.1)
Torque Speed, rpm ................ 2400
Compression Ratio ................ 8.5:1
Cylinder Liner ................ Cast iron
Valve Arrangement ................ OHV
PTO Shaft Rotation ................ Counterclockwise (from PTO shaft side)
Lubrication System ................ Forced splash type
Cooling System ................ Forced air
Air Cleaner Type ................ Semi-dry, dual, or semicyclone
Ignition System ................ TCI (transistor controlled ignition)
Starting System ................ Recoil or electric starter
Fuel System
Fuel System Type ................ Carburetor
Carburetor Type ................ Float
Governor Type ................ Centrifugal, flyweight
Fuel Tank Capacity, qts (L) ................ 4.8 (4.5)
Fuel Type ................ Gasoline (86 or higher)
Fuel Consumption, g/ps-h ................ 236
Dimensions and Weight
Overall Length, in (mm) ................ 12.5 (318)
Overall Width, in (mm) ................ 14.2 (352)
Overall Height, in (mm) ................ 14.6 (370)
Dry Weight, lbs (kg) ................ 39.6 (18.0)
Yamaha MZ200 Maintenance Data
Service Data
Cylinder Bore Inside Diameter (Max), in (mm) ................ 2.7618 (70.150)
Cylinder Head (Max. Out of Flatness), in (mm) ................ 0.003 (0.08)
Intake Valve Clearance, in (mm) ................ 0.004 (0.10)
Exhaust Valve Clearance, in (mm) ................ 0.004 (0.10)
Engine Oil and Filter
Engine Oil Type ................ Yamalube, SAE 10W, SAE 10W-30, 10W-40
API Service Classifications ................ SE or SF
Oil Capacity, qts (L) ................ 0.63 (0.60)
Air Filter Element Part Number ................ 7CN-E4451-00
Ignition System
Spark Plug Type ................ NGK BPR4ES
Spark Plug Gap, in (mm) ................ 0.028-0.032 (0.70-0.80)
TCI Air Gap, in (mm) ................ 0.008-0.024 (0.20-0.60)
Spark Plug Torque, Nm (ft-lbs) ................ 20 (14)
Service Intervals
Check Engine Oil Level ................ Every 10 hours
Service Air Filter Element ................ Every 50 hours
Clean and Adjust Spark Plug ................ Every 50 hours
Change Engine Oil ................ Every 100 hours
Clean Fuel Filter ................ Every 100 hours
Clean Fuel Strainer ................ Every 100 hours
Check Fuel Hose ................ Every 100 hours
Replace Spark Plug ................ Every 200 hours
Replace Air Filter Element ................ Every 200 hours
Check Carburetor Adjustment ................ Every 200 hours
Check Breather Hose ................ Every 300 hours
Check and Adjust Idle Speed ................ Every 300 hours
Check and Adjust Valve Clearance ................ Every 300 hours
Replacement Parts
Cylinder Head Gasket. Part Number ................ 7DH-E1181-00
Head Cover Gasket. Part Number ................ 7CN-E1191-00
Breather Cover Gasket ................ 7CN-E1193-00
Crankshaft Oil Seal. Part Number ................ 93102-25805
Spark Plug. Part Number ................ 94702-00819
Fuel Strainer. Part Number ................ 7CN-F4167-00
Air Filter Element. Part Number ................ 7CN-E4451-00
Tightening Torques
Cylinder Head Bolt, Nm (ft-lb) ................ 20 (14.5)
Cylinder Head Cover Bolt, Nm (ft-lb) ................ 10 (7.2)
Connecting Rod Cap (M7x1.0), Nm (ft-lb) ................ 12 (8.7)
Flywheel Nut, Nm (ft-lb) ................ 65 (47)
Muffler Cap Bolt, Nm (ft-lb) ................ 10 (7.2)
Oil Drain Bolt, Nm (ft-lb) ................ 3.5 (2.5)
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