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Yamaha MZ360 8.4hp Engines

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Yamaha MZ360 Industrial Engine Yamaha MZ360 performance curve

Specifications

Model Name MZ360 MZ360 Reduction Type
Bore x Stroke 85 x 63 mm 85 x 63 mm
Displacement 357 cc 357 cc
Compression Ratio 8.1:1 8.1:1
Max Power (Net)* 7.6 kW (10.2 hp) @ 3600 rpm 7.6 kW (10.2 hp) @ 1800 rpm
Rated Power (Net)* 6.3 kW (8.4 hp) @ 3600 rpm 6.3 kW (8.4 hp) @ 1800 rpm
Max Torque (Net)* 23.9 Nm (17.6 ft-lbf) @ 2400 rpm 47.8 Nm (35.3 ft-lbf) @ 2400 rpm
Fuel Unleaded Gasoline Unleaded Gasoline
Fuel Tank Capacity 6.1 L (1.61 gal) 6.1 L (1.61 gal)
Ignition System T.C.I. T.C.I.
Spark Plug NGK BPR4ES NGK BPR4ES
Lubrication System Mechanical Splashing Mechanical Splashing
Oil Capacity 1.1 L (1.2 qt) 1.1 L (1.2 qt)
Dry Weight 33Kg (73.8 lb) 36Kg (79.4 lb)
Dimensions (L**xWxH) 424.5 x 451 x 481 mm 450 x 451 x 481 mm
  * Net horsepower and torque are measured on a production engine with the factory-installed air cleaner and muffler using Yamaha-developed test standards. Actual power output of a particular engine can vary due to manufacturing tolerance differences, as well as numerous factors such as ambient operating conditions, how the engine is maintained, the type of equipment being powered, and variances in the installation, including the intake and exhaust systems, fuel delivery, and engine cooling.
** Length dimension with Type A PTO.
*** Fuel consumption estimates are based on Yamaha testing of a production engine with the factory installed air cleaner and muffler. Actual fuel consumption will vary due to the same factors that can affect engine power as well as the operating speed in the application and other variables.

Parts Lookup

 


Dimensions (Basic)

MZ360 PTO A Type

Yamaha MZ360 dimensions basic

MZ360 Reduction Type

Yamaha MZ360 dimensions reduction

Dimensions (Mounting Face)

Direct Type

Yamaha MZ360 dimensions mounting face basic

PTO Type

Yamaha MZ360 dimensions mounting face reduction

 

Dimensions (PTO)

Yamaha MZ360 dimensions pto shaft

 


Features

Yamaha MZ360 features main

Yamaha features bullet aAIR CLEANER Yamaha features bullet bINTAKE MANIFOLD Yamaha features bullet cSPARK PLUG
Yamaha features bullet dMUFFLER Yamaha features bullet eDECOMPRESSION Yamaha features bullet fCYLINDER SLEEVE
Yamaha features bullet gEXHAUST VALVE Yamaha features bullet hBALANCER  

Yamaha MZ360 MZ300 MZ250 MZ200 MZ175 features clean pto faceClean PTO Face

The clean PTO mounting face ensures customers experience minimal interference from exhaust components for easier installation to their machinery than with some competitive engines.

Variety of PTO Shaft and Mounting Face Options

EPA/CARB Compliant* 

 


Yamaha features bullet aAir Cleaner

Silent Semidry Air Filter Types**

Yamaha MZ360 MZ300 MZ250 MZ200 MZ175 features airfilter 1DUST CONDITIONS
Best suited for low dust conditions.

APPLICATION EXAMPLES

  • Generators
  • Water Pumps
  • Pressure Washers
  • Air Compressors (General Use)

 

Paper Element + Foam Pre-Filter Types*

Yamaha MZ360 MZ300 MZ250 MZ200 MZ175 features airfilter 2DUST CONDITIONS
Best suited for all dust conditions.

APPLICATION EXAMPLES

  • Generators
  • Air Compressors (Construction)
  • Harvesting Machines
  • Reel Mowers
  • Wheeled Blowers
  • Concrete Saws

Yamaha MZ360 MZ300 MZ250 MZ200 MZ175 features intakeYamaha features bullet bIntake Manifold

Intake mixture flow is optimized by utilizing a swirl effect that creates a uniform fuel/air mixture throughout the combustion chamber. This increases the speed of combustion throughout the cylinder, increasing power while decreasing fuel consumption and exhaust emissions.

 

 

 


Yamaha features bullet cSpark Plug

Yamaha MZ360 MZ300 MZ250 MZ200 MZ175 features sparkplug

Equipped with an industry-standard "BPR4ES" resistance-type spark plug.

 

 

 

 


Yamaha MZ360 MZ300 MZ250 MZ200 MZ175 features mufflerYamaha features bullet dMuffler

The large muffler reduces exhaust noise.

 

 

 

 


Yamaha features bullet eDecompression

Yamaha MZ360 MZ300 MZ250 MZ200 MZ175 features decompressionWhen starting the engine, the exhaust valve is held open to reduce compression pressure for easier starting.

 

 

When starting the engine:

  1. The decompression weight pushes the pin up to push the lifter.
  2. The exhaust valve is held in the open position, rather than be opened and closed by the camshaft.

When operating the engine:

  1. Centrifugal force causes the decompression weight to open, which lowers the pin.
  2. With the pin lowered, the exhaust valve operates normally, and is controlled by the camshaft.

 


Yamaha features bullet fCylinder Sleeve

Yamaha MZ360 MZ300 MZ250 MZ200 MZ175 features cylinderA cast iron sleeve is used to increase engine durability and decrease cylinder wear. Due to the difference in expansion rates of aluminum and cast iron, a "Spiny" sleeve design is used to reduce air pockets created by different amounts of expansion. This design also promotes heat transfer from sleeve to block, allowing the cooling fins to work more effectively.

 


Yamaha MZ360 MZ300 MZ250 MZ200 MZ175 features valveYamaha features bullet gExhaust Valve

The exhaust valve is manufactured from high-heat-resistant SUH3 steel. The entire valve surface has a polished Tufftride® finish, increasing hardness and decreasing friction through the valve guides. The valve seat is Stellite® coated to increase resistance to the 700+° C valve face temperature exposure.

 

 


Yamaha MZ360 features inset balancerYamaha features bullet hBalancer

Due to the larger displacement of the MZ360 engine, a balancer shaft assembly is utilized to minimize vibration.

 

 

 

 

 

 * Consult Billiou's. Inc. for availability from Yamaha Motor Corporation, USA. Available options may require extended lead time for compliance testing when applicable.

 

Parts Lookup

 

Website link Yamaha Engine Website

 

 

Yamaha MZ300 7.8hp and MZ250 6.0hp Engines

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Yamaha MZ300 7.8hp Engines

Yamaha MZ300 Industrial Engine Yamaha MZ300 performance curve

Specifications

Model Name MZ300
Bore x Stroke 80 x 59 mm
Displacement 296 cc
Compression Ratio 8.4:1
Max Power (Net)* 7.0 kW (9.4 hp) @ 3600 rpm
Rated Power (Net)* 5.8 kW (7.8 hp) @ 3600 rpm
Max Torque (Net)* 20.3 Nm (15 ft-lbf) @ 2400 rpm
Fuel Unleaded Gasoline
Fuel Tank Capacity 5.5 L (1.45 gal)
Ignition System T.C.I.
Spark Plug NGK BPR4ES
Lubrication System Mechanical Splashing
Oil Capacity 1.0 L (1.1 qt)
Dry Weight 26Kg (57.3 lb)
Dimensions (L**xWxH) 387.5 x 426 x 464 mm

  * Net horsepower and torque are measured on a production engine with the factory-installed air cleaner and muffler using Yamaha-developed test standards. Actual power output of a particular engine can vary due to manufacturing tolerance differences, as well as numerous factors such as ambient operating conditions, how the engine is maintained, the type of equipment being powered, and variances in the installation, including the intake and exhaust systems, fuel delivery, and engine cooling.
** Length dimension with Type A PTO.
*** Fuel consumption estimates are based on Yamaha testing of a production engine with the factory installed air cleaner and muffler. Actual fuel consumption will vary due to the same factors that can affect engine power as well as the operating speed in the application and other variables.

Parts Lookup

 

Yamaha MZ250 6.0hp Engines

Yamaha MZ250 Industrial Engine Yamaha MZ250 performance curve

Specifications

Model Name MZ250
Bore x Stroke 74 x 59 mm
Displacement 253 cc
Compression Ratio 8.7:1
Max Power (Net)* 5.4 kW (7.2 hp) @ 3600 rpm
Rated Power (Net)* 4.5 kW (6.0 hp) @ 3600 rpm
Max Torque (Net)* 15.7 Nm (11.6 ft-lbf) @ 2400 rpm
Fuel Unleaded Gasoline
Fuel Tank Capacity 5.5 L (1.45 gal)
Ignition System T.C.I.
Spark Plug NGK BPR4ES
Lubrication System Mechanical Splashing
Oil Capacity 1.0 L (1.1 qt)
Dry Weight 26Kg (57.3 lb)
Dimensions (L**xWxH) 387.5 x 426 x 464 mm

  * Net horsepower and torque are measured on a production engine with the factory-installed air cleaner and muffler using Yamaha-developed test standards. Actual power output of a particular engine can vary due to manufacturing tolerance differences, as well as numerous factors such as ambient operating conditions, how the engine is maintained, the type of equipment being powered, and variances in the installation, including the intake and exhaust systems, fuel delivery, and engine cooling.
** Length dimension with Type A PTO.
*** Fuel consumption estimates are based on Yamaha testing of a production engine with the factory installed air cleaner and muffler. Actual fuel consumption will vary due to the same factors that can affect engine power as well as the operating speed in the application and other variables.

Parts Lookup

 


Dimensions (Basic)

MZ300/MZ250 PTO A Type

Yamaha MZ300 MZ250 dimensions basic

Dimensions (Mounting Face)

Direct Type

Yamaha MZ300 MZ250 dimensions mounting face

Dimensions (PTO)

Yamaha MZ300 MZ250 dimensions pto

 


New Technology

Increased Fuel Efficiency

Yamaha MZ300 technology inset chamberHemispherical Combustion Chamber

A fast combustion speed is necessary to increase combustion efficiency. Since the compact size and shape of the hemispherical combustion chamber adopted on MZ250/MZ300 reduce the distance that the combustion flame ignited by the spark plug must travel, less gas remains unburned and the combustion speed is increased. This results in improved fuel efficiency.

Difference in Combustion Chamber Shape

Yamaha MZ300 MZ250 technology inset chamber

 Yamaha MZ300 MZ250 technology inset consumption

*** Fuel consumption estimates are based on Yamaha testing of a production engine with the factory installed air cleaner and muffler. Actual fuel consumption will vary due to the same factors that can affect engine power as well as the operating speed in the application and other variables.

 

Valve Angle

Yamaha MZ300 MZ250 technology inset valveTo enable a hemispherical combustion chamber shape, the intake and exhaust valves are set at a 22° angle. To accommodate this angle, the intake port shape was changed from the previous design. The interior of the combustion chamber is conducive to creating a swirl that speeds up combustion, boosts combustion efficiency, and helps achieve better fuel efficiency.

 

Ignition Timing

Since the hemispherical combustion chamber increases combustion speed compared to the previous engine design, the ignition timing (advance) has also been changed from BTDC 23° to the new model's BTDC 20°.

Explanation
Ignition timing (or ignition advance) means the timing of the firing of the spark plug. It is expressed in terms of the number of degrees of [crank] angle when the ignition fires before the piston reaches top dead center in its compression stroke. For example, BTDC 25° (BTDC = Before Top Dead Center, which is designated as 0°) would mean that the ignition fires at the point where the crank angle is 25° before top dead center. The reason for such an advance in the ignition timing is because it takes some time for the ignition flame to spread through the air-fuel mixture in the entire combustion chamber. If the ignition was fired when the piston reached top dead center, combustion would occur too late to deliver maximum power and efficiency.

 

Air Cleaner with New Air Intake Position

Yamaha MZ300 MZ250 technology inset filter(Only on Silent Semi-Dry Series)
The latest generation MZ250 and MZ300 models have a new air cleaner design with the intake vents located at the top of the box where the intake air is less influenced by engine heat and less likely to draw in dusty air. Also, a new filter material has been chosen to minimize dust intake and improve fuel efficiency and maintenance.

 

Engineered to be Compact

Yamaha MZ300 MZ250 technology inset compactThe previous MZ300 model was the same size as the MZ360, but now design changes throughout the engine have reduced the size of the compact new model sufficiently to make it the same size as the MZ250. First of all, the forward incline angle of the cylinder was changed from 28° to 22° from the horizontal for decreased overall height. At the same time, the shape of the piston and its skirt was changed and the length of the connecting rod shortened (110 mm > 102 mm) for an optimum design that reduced the dimension in the direction of the cylinder head. In addition, a review was made of the head assembly from the standpoint of space efficiency, resulting in a reduction in overall width by setting the breather chamber in the head at an angle.

Furthermore, the recoil assembly was made thinner through design changes like positioning a pair of cooling air ducts on two sides, and a thinner air cleaner design was also adopted to contribute to overall compactness. Despite its compact design, the new MZ300 maintains the same level of power output as the previous model. As a result, it now has the largest displacement of all competing models in its size category*.

* As of June 2012, according to Yamaha Motor surveys.

 

Canister Cap for U.S.A. (EPA and CARB) Emission Standards

Yamaha MZ300 MZ250 technology inset capA chain is included to prevent loss of the fuel cap during refueling

 

 

 

 

 

 

 


Features

Yamaha MZ360 features main

Yamaha features bullet aAIR CLEANER Yamaha features bullet bINTAKE MANIFOLD Yamaha features bullet cSPARK PLUG
Yamaha features bullet dMUFFLER Yamaha features bullet eDECOMPRESSION Yamaha features bullet fCYLINDER SLEEVE
Yamaha features bullet gEXHAUST VALVE    

Yamaha MZ360 MZ300 MZ250 MZ200 MZ175 features clean pto faceClean PTO Face

The clean PTO mounting face ensures customers experience minimal interference from exhaust components for easier installation to their machinery than with some competitive engines.

Variety of PTO Shaft and Mounting Face Options

EPA/CARB Compliant* 

 


Yamaha features bullet aAir Cleaner

Silent Semidry Air Filter Types**

Yamaha MZ360 MZ300 MZ250 MZ200 MZ175 features airfilter 1DUST CONDITIONS
Best suited for low dust conditions.

APPLICATION EXAMPLES

  • Generators
  • Water Pumps
  • Pressure Washers
  • Air Compressors (General Use)

 

Paper Element + Foam Pre-Filter Types*

Yamaha MZ360 MZ300 MZ250 MZ200 MZ175 features airfilter 2DUST CONDITIONS
Best suited for all dust conditions.

APPLICATION EXAMPLES

  • Generators
  • Air Compressors (Construction)
  • Harvesting Machines
  • Reel Mowers
  • Wheeled Blowers
  • Concrete Saws

Yamaha MZ360 MZ300 MZ250 MZ200 MZ175 features intakeYamaha features bullet bIntake Manifold

Intake mixture flow is optimized by utilizing a swirl effect that creates a uniform fuel/air mixture throughout the combustion chamber. This increases the speed of combustion throughout the cylinder, increasing power while decreasing fuel consumption and exhaust emissions.

 

 

 


Yamaha features bullet cSpark Plug

Yamaha MZ360 MZ300 MZ250 MZ200 MZ175 features sparkplug

Equipped with an industry-standard "BPR4ES" resistance-type spark plug.

 

 

 

 


Yamaha MZ360 MZ300 MZ250 MZ200 MZ175 features mufflerYamaha features bullet dMuffler

The large muffler reduces exhaust noise.

 

 

 

 


Yamaha features bullet eDecompression

Yamaha MZ360 MZ300 MZ250 MZ200 MZ175 features decompressionWhen starting the engine, the exhaust valve is held open to reduce compression pressure for easier starting.

 

 

When starting the engine:

  1. The decompression weight pushes the pin up to push the lifter.
  2. The exhaust valve is held in the open position, rather than be opened and closed by the camshaft.

When operating the engine:

  1. Centrifugal force causes the decompression weight to open, which lowers the pin.
  2. With the pin lowered, the exhaust valve operates normally, and is controlled by the camshaft.

 


Yamaha features bullet fCylinder Sleeve

Yamaha MZ360 MZ300 MZ250 MZ200 MZ175 features cylinderA cast iron sleeve is used to increase engine durability and decrease cylinder wear. Due to the difference in expansion rates of aluminum and cast iron, a "Spiny" sleeve design is used to reduce air pockets created by different amounts of expansion. This design also promotes heat transfer from sleeve to block, allowing the cooling fins to work more effectively.

 


Yamaha MZ360 MZ300 MZ250 MZ200 MZ175 features valveYamaha features bullet gExhaust Valve

The exhaust valve is manufactured from high-heat-resistant SUH3 steel. The entire valve surface has a polished Tufftride® finish, increasing hardness and decreasing friction through the valve guides. The valve seat is Stellite® coated to increase resistance to the 700+° C valve face temperature exposure.

 

 


 

 

 * Consult Billiou's. Inc. for availability from Yamaha Motor Corporation, USA. Available options may require extended lead time for compliance testing when applicable.

 

Parts Lookup

 

Website link Yamaha Engine Website

 

 

Yamaha MZ360 8.4hp Engines

Yamaha logo lg

Yamaha MZ360 Industrial Engine Yamaha MZ360 performance curve

Specifications

Model Name MZ360 MZ360 Reduction Type
Bore x Stroke 85 x 63 mm 85 x 63 mm
Displacement 357 cc 357 cc
Compression Ratio 8.1:1 8.1:1
Max Power (Net)* 7.6 kW (10.2 hp) @ 3600 rpm 7.6 kW (10.2 hp) @ 1800 rpm
Rated Power (Net)* 6.3 kW (8.4 hp) @ 3600 rpm 6.3 kW (8.4 hp) @ 1800 rpm
Max Torque (Net)* 23.9 Nm (17.6 ft-lbf) @ 2400 rpm 47.8 Nm (35.3 ft-lbf) @ 2400 rpm
Fuel Unleaded Gasoline Unleaded Gasoline
Fuel Tank Capacity 6.1 L (1.61 gal) 6.1 L (1.61 gal)
Ignition System T.C.I. T.C.I.
Spark Plug NGK BPR4ES NGK BPR4ES
Lubrication System Mechanical Splashing Mechanical Splashing
Oil Capacity 1.1 L (1.2 qt) 1.1 L (1.2 qt)
Dry Weight 33Kg (73.8 lb) 36Kg (79.4 lb)
Dimensions (L**xWxH) 424.5 x 451 x 481 mm 450 x 451 x 481 mm
  * Net horsepower and torque are measured on a production engine with the factory-installed air cleaner and muffler using Yamaha-developed test standards. Actual power output of a particular engine can vary due to manufacturing tolerance differences, as well as numerous factors such as ambient operating conditions, how the engine is maintained, the type of equipment being powered, and variances in the installation, including the intake and exhaust systems, fuel delivery, and engine cooling.
** Length dimension with Type A PTO.
*** Fuel consumption estimates are based on Yamaha testing of a production engine with the factory installed air cleaner and muffler. Actual fuel consumption will vary due to the same factors that can affect engine power as well as the operating speed in the application and other variables.

Parts Lookup

 


Dimensions (Basic)

MZ360 PTO A Type

Yamaha MZ360 dimensions basic

MZ360 Reduction Type

Yamaha MZ360 dimensions reduction

Dimensions (Mounting Face)

Direct Type

Yamaha MZ360 dimensions mounting face basic

PTO Type

Yamaha MZ360 dimensions mounting face reduction

 

Dimensions (PTO)

Yamaha MZ360 dimensions pto shaft

 


Features

Yamaha MZ360 features main

Yamaha features bullet aAIR CLEANER Yamaha features bullet bINTAKE MANIFOLD Yamaha features bullet cSPARK PLUG
Yamaha features bullet dMUFFLER Yamaha features bullet eDECOMPRESSION Yamaha features bullet fCYLINDER SLEEVE
Yamaha features bullet gEXHAUST VALVE Yamaha features bullet hBALANCER  

Yamaha MZ360 MZ300 MZ250 MZ200 MZ175 features clean pto faceClean PTO Face

The clean PTO mounting face ensures customers experience minimal interference from exhaust components for easier installation to their machinery than with some competitive engines.

Variety of PTO Shaft and Mounting Face Options

EPA/CARB Compliant* 

 


Yamaha features bullet aAir Cleaner

Silent Semidry Air Filter Types**

Yamaha MZ360 MZ300 MZ250 MZ200 MZ175 features airfilter 1DUST CONDITIONS
Best suited for low dust conditions.

APPLICATION EXAMPLES

  • Generators
  • Water Pumps
  • Pressure Washers
  • Air Compressors (General Use)

 

Paper Element + Foam Pre-Filter Types*

Yamaha MZ360 MZ300 MZ250 MZ200 MZ175 features airfilter 2DUST CONDITIONS
Best suited for all dust conditions.

APPLICATION EXAMPLES

  • Generators
  • Air Compressors (Construction)
  • Harvesting Machines
  • Reel Mowers
  • Wheeled Blowers
  • Concrete Saws

Yamaha MZ360 MZ300 MZ250 MZ200 MZ175 features intakeYamaha features bullet bIntake Manifold

Intake mixture flow is optimized by utilizing a swirl effect that creates a uniform fuel/air mixture throughout the combustion chamber. This increases the speed of combustion throughout the cylinder, increasing power while decreasing fuel consumption and exhaust emissions.

 

 

 


Yamaha features bullet cSpark Plug

Yamaha MZ360 MZ300 MZ250 MZ200 MZ175 features sparkplug

Equipped with an industry-standard "BPR4ES" resistance-type spark plug.

 

 

 

 


Yamaha MZ360 MZ300 MZ250 MZ200 MZ175 features mufflerYamaha features bullet dMuffler

The large muffler reduces exhaust noise.

 

 

 

 


Yamaha features bullet eDecompression

Yamaha MZ360 MZ300 MZ250 MZ200 MZ175 features decompressionWhen starting the engine, the exhaust valve is held open to reduce compression pressure for easier starting.

 

 

When starting the engine:

  1. The decompression weight pushes the pin up to push the lifter.
  2. The exhaust valve is held in the open position, rather than be opened and closed by the camshaft.

When operating the engine:

  1. Centrifugal force causes the decompression weight to open, which lowers the pin.
  2. With the pin lowered, the exhaust valve operates normally, and is controlled by the camshaft.

 


Yamaha features bullet fCylinder Sleeve

Yamaha MZ360 MZ300 MZ250 MZ200 MZ175 features cylinderA cast iron sleeve is used to increase engine durability and decrease cylinder wear. Due to the difference in expansion rates of aluminum and cast iron, a "Spiny" sleeve design is used to reduce air pockets created by different amounts of expansion. This design also promotes heat transfer from sleeve to block, allowing the cooling fins to work more effectively.

 


Yamaha MZ360 MZ300 MZ250 MZ200 MZ175 features valveYamaha features bullet gExhaust Valve

The exhaust valve is manufactured from high-heat-resistant SUH3 steel. The entire valve surface has a polished Tufftride® finish, increasing hardness and decreasing friction through the valve guides. The valve seat is Stellite® coated to increase resistance to the 700+° C valve face temperature exposure.

 

 


Yamaha MZ360 features inset balancerYamaha features bullet hBalancer

Due to the larger displacement of the MZ360 engine, a balancer shaft assembly is utilized to minimize vibration.

 

 

 

 

 

 * Consult Billiou's. Inc. for availability from Yamaha Motor Corporation, USA. Available options may require extended lead time for compliance testing when applicable.

 

Parts Lookup

 

Website link Yamaha Engine Website

 

 

Yamaha MZ Engine Series

Yamaha logo lg

Yamaha premium grade, gasoline engines provide maximum performance, high quality, and efficient, dependable power for the most demanding applications. Go with the name you can trust when it's time to power your equipment. Power it with Yamaha.

Yamaha MZ360 Industrial Engine

  • Designed for high durability
  • Delivers good rpm stability for high power and high performance operation
  • Economical engine with low fuel and oil consumption
  • Very quiet operation due to excellent sound-reducing design
  • Extended run time
  • Easy operation and maintenance
  • Broad selection of PTO options makes this engine adaptable to a wide range of machinery
  • Equipped with a Noise Suppressor (Radio Noise Suppression) to keep noise to a minimum

 

Flexible Specifications

  • Shaft Type
  • Engine Type
  • Air Cleaner Type

 

Check out this link for more information:

MZ Engine Series

Parts Lookup

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