What Is the Yanmar 8LV Marine Engine?
The Yanmar 8LV Marine Engine is a compact, high-speed V8 common-rail marine diesel engine designed for recreational and selected commercial marine applications.
Unlike the inline-six Yanmar 6LY, 6LF, and 6LT families, the 8LV uses an eight-cylinder V-configuration combined with twin turbochargers, intercooling, electronic controls, and Denso common-rail direct injection.
The main Yanmar 8LV models are:
- Yanmar 8LV320
- Yanmar 8LV350
- Yanmar 8LV370
Sterndrive versions are also available, commonly identified with the Z designation. Yanmar lists the complete series at 320–370 mhp and 3800 rpm.
Alfa Marine Spare Parts supplies OEM, genuine, aftermarket, and remanufactured Yanmar 8LV marine engine spare parts for scheduled maintenance, fuel-system repairs, cooling-system service, turbocharger work, electrical repairs, major component replacement, rebuilding, and engine overhaul requirements.
Yanmar 8LV Technical Information
The three principal 8LV models share the same basic 4.46-liter V8 architecture.
SpecificationYanmar 8LV SeriesEngine TypeFour-stroke marine dieselCylinder ConfigurationV8Number of Cylinders8Displacement4.46 LBore86 mmStroke96 mmFuel SystemDenso Common RailCombustionDirect InjectionAspirationTwin Turbocharged & IntercooledRated Speed3800 rpmControlsElectronicAlternator12 V / 180 ADry Weight Without GearApprox. 435 kgPower Range320–370 mhp
Yanmar also identifies the current 8LV320, 8LV350, and 8LV370 as HVO-approved engines.
Which Yanmar 8LV Models Are Available?Yanmar 8LV320
The Yanmar 8LV320 is rated at:
- 235 kW
- 320 mhp
- 3800 rpm
It uses the same 4.46-liter V8 architecture, Denso common-rail direct injection, twin turbochargers, and intercooling.
Yanmar 8LV350
The Yanmar 8LV350 is rated at:
- 257 kW
- 350 mhp
- 3800 rpm
It also uses electronic control and the twin-turbocharged, intercooled V8 configuration.
Yanmar 8LV370
The Yanmar 8LV370 is rated at:
- 272 kW
- 370 mhp
- 3800 rpm
This is the highest-output model in the current 8LV range.
Is the Yanmar 8LV a V8 Engine?
Yes.
This is an important distinction when identifying parts.
The Yanmar 8LV has:
- 8 cylinders
- V-configuration
- 4.46-liter displacement
- 86 mm bore
- 96 mm stroke
Yanmar describes the V8 common-rail arrangement as providing smooth and quiet operation while maintaining a compact power-to-weight ratio.
Is the Yanmar 8LV Twin Turbocharged?
Yes.
The 8LV uses two turbochargers together with intercooling.
Yanmar specifically highlights the twin-turbo arrangement as a key feature of the series, designed to provide high torque and responsive acceleration.
Available turbocharger-related parts can include:
- Complete Turbochargers
- Turbocharger Assemblies
- Remanufactured Turbochargers
- Turbocharger Cartridges
- Compressor Components
- Turbine Components
- Turbocharger Shafts
- Bearings
- Seals
- Oil Supply Components
- Oil Drain Components
- Turbocharger Gaskets
- Mounting Hardware
Because this is a twin-turbo engine, correct identification of the required turbocharger and its installation position is important when requesting replacement components.
What Fuel System Does the Yanmar 8LV Use?
The Yanmar 8LV uses Denso common-rail direct injection.
The common-rail system maintains high-pressure fuel that is electronically controlled before injection into each cylinder.
Available fuel-system components can include:
- Common-Rail Fuel Injectors
- High-Pressure Fuel Pump Components
- Fuel Supply Pumps
- Fuel Rail Components
- Fuel Pressure Sensors
- Pressure-Control Components
- Fuel Filters
- Fuel Filter Elements
- Fuel Filter Housings
- High-Pressure Fuel Pipes
- Low-Pressure Fuel Lines
- Injector Seals
- Injector O-Rings
- Fuel-System Gaskets
- Electronic Fuel-Control Components
Yanmar 8LV Common-Rail Fuel Injector Parts
The eight fuel injectors play an important role in controlling combustion.
Available injector-related components can include:
- Complete Common-Rail Injectors
- Remanufactured Fuel Injectors
- Injector Seals
- Injector O-Rings
- Injector Washers
- Injector Hardware
- High-Pressure Fuel Pipes
- Associated Common-Rail Components
Injector condition can influence:
- Cold starting
- Hot starting
- Idle quality
- Acceleration
- Engine power
- Fuel consumption
- Cylinder balance
- Exhaust smoke
- Combustion quality
Common-rail components should be identified using the complete engine model and serial number.
Yanmar 8LV High-Pressure Fuel System Parts
The high-pressure system supplies the common rail with fuel at the pressure required by the electronic injection system.
Available components can include:
- High-Pressure Fuel Pump Components
- Fuel Rail Components
- Pressure Sensors
- Pressure-Control Components
- High-Pressure Fuel Pipes
- Fuel Connections
- Pump Seals
- Associated Gaskets
- Mounting Hardware
Cleanliness is especially important when servicing common-rail components because of the extremely fine tolerances within the system.
Yanmar 8LV Intercooler Parts
The intercooling system reduces the temperature of compressed intake air after it passes through the turbocharging system.
Available components can include:
- Intercooler Assemblies
- Charge-Air Cooler Components
- Cooler Cores
- Cooler Housings
- End Covers
- Intake Pipes
- Air Connections
- Hoses
- Clamps
- Gaskets
- O-Rings
- Seals
Yanmar 8LV Cylinder Head Parts
Because the engine uses a V8 configuration, the cylinder-head arrangement differs fundamentally from Yanmar's inline-six marine engines.
Available cylinder-head components can include:
- Cylinder Head Assemblies
- Intake Valves
- Exhaust Valves
- Valve Guides
- Valve Seats
- Valve Springs
- Rocker and Valve-Train Components
- Injector Components
- Cylinder Head Gaskets
- Cylinder Head Seals
- Associated Hardware
When requesting a cylinder head or related component, provide the complete engine identification and the required side or position where applicable.
Yanmar 8LV Piston Parts
The engine contains eight piston assemblies.
Available piston-related components can include:
- Pistons
- Piston Rings
- Piston Pins
- Retaining Components
- Associated Hardware
Piston and ring condition affects:
- Cylinder compression
- Combustion sealing
- Blow-by
- Oil consumption
- Engine power
- Overall engine performance
Yanmar 8LV Connecting Rod Parts
Available components can include:
- Connecting Rods
- Connecting Rod Bearings
- Connecting Rod Bushings
- Connecting Rod Bolts
- Associated Hardware
The connecting rods transfer combustion force from the eight pistons to the crankshaft.
Yanmar 8LV Crankshaft and Bearing Parts
Available rotating-assembly components can include:
- Complete Crankshafts
- Main Bearings
- Connecting Rod Bearings
- Thrust Bearings
- Crankshaft Gear Components
- Front Crankshaft Seals
- Rear Crankshaft Seals
- Vibration Damper Components
- Associated Hardware
Yanmar 8LV Camshaft and Valve Train Parts
Available components can include:
- Camshaft Components
- Camshaft Bearings
- Timing Components
- Rocker Components
- Intake Valves
- Exhaust Valves
- Valve Guides
- Valve Seats
- Valve Springs
- Associated Hardware
The exact valve-train component should always be identified from the applicable 8LV engine information.
Yanmar 8LV Marine Cooling System
Marine diesel engines operate for extended periods under significant load, making cooling-system condition particularly important.
The 8LV cooling system can include components such as:
- Freshwater Pumps
- Seawater Pumps
- Heat Exchangers
- Thermostats
- Coolant Pipes
- Raw-Water Pipes
- Cooling Hoses
- Temperature Sensors
- Gaskets
- O-Rings
- Seals
Yanmar 8LV Seawater Pump Parts
The seawater pump circulates external raw water through the marine cooling circuit.
Available components can include:
- Complete Seawater Pumps
- Raw-Water Pumps
- Impellers
- Pump Shafts
- Pump Bearings
- Mechanical Seals
- Pump Covers
- Wear Components
- Gaskets
- O-Rings
- Raw-Water Connections
Correct pump identification should use the engine model, serial number, and installation information.
Yanmar 8LV Heat Exchanger Parts
Available heat-exchanger components can include:
- Complete Heat Exchangers
- Heat Exchanger Cores
- End Covers
- End Caps
- Gaskets
- O-Rings
- Seals
- Freshwater Connections
- Raw-Water Connections
- Associated Hardware
Yanmar 8LV Lubrication System Parts
Available lubrication-system components can include:
- Engine Oil Pumps
- Oil Filters
- Oil Filter Elements
- Oil Filter Housings
- Oil Coolers
- Oil Pressure Sensors
- Oil Lines
- Oil Pipes
- Oil Drain Components
- Oil Seals
- Lubrication-System Gaskets
Correct lubrication is particularly important for components such as:
- Crankshaft
- Main Bearings
- Connecting Rod Bearings
- Valve Train
- Pistons
- Twin Turbochargers
Yanmar 8LV Electronic Engine Components
The 8LV is electronically controlled.
Yanmar lists the VC10 Vessel Control System for the 8LV series and supports up to three control stations. Joystick-control solutions are also available for appropriate twin-engine installations.
Depending on configuration, available electrical and control components can include:
- Engine Control Components
- Fuel Pressure Sensors
- Oil Pressure Sensors
- Coolant Temperature Sensors
- Engine Speed Sensors
- Position Sensors
- Wiring Harnesses
- CAN-Bus Components
- Vessel-Control Components
- Control Panels
- Monitoring Components
- Electrical Connections
Electronic components should be matched to the exact engine and vessel-control configuration.
Yanmar 8LV Alternator Parts
Yanmar specifies a 12 V, 180 A alternator for the current 8LV range.
Available charging-system components can include:
- Complete Alternators
- Alternator Components
- Regulators
- Pulleys
- Belts
- Wiring Components
- Electrical Connections
- Associated Hardware
Yanmar 8LV Starting System Parts
Available starting-system components can include:
- Starter Motors
- Starter Solenoids
- Relays
- Wiring Components
- Electrical Connections
- Associated Hardware
Yanmar 8LV Exhaust System Parts
Available exhaust components can include:
- Exhaust Manifold Components
- Exhaust Manifold Gaskets
- Turbocharger Connections
- Mixing Elbows
- Exhaust Pipes
- Exhaust Cooling Components
- Marine Exhaust Connections
- Exhaust Seals
- Mounting Hardware
Yanmar 8LV Gaskets and Seals
Available sealing components can include:
- Cylinder Head Gaskets
- Valve Cover Gaskets
- Intake Gaskets
- Exhaust Gaskets
- Turbocharger Gaskets
- Intercooler Gaskets
- Heat Exchanger Gaskets
- Water Pump Gaskets
- Oil Cooler Gaskets
- Injector Seals
- Front Crankshaft Seals
- Rear Crankshaft Seals
- O-Rings
- Complete Gasket Sets
- Engine Seal Kits
Yanmar 8LV Overhaul Parts
Depending on the engine condition and overhaul scope, available components can include:
- Pistons
- Piston Rings
- Piston Pins
- Main Bearings
- Connecting Rod Bearings
- Thrust Bearings
- Connecting Rod Components
- Cylinder Head Components
- Intake Valves
- Exhaust Valves
- Common-Rail Injectors
- Crankshaft Seals
- Complete Gasket Sets
- Seal Kits
- Freshwater Pumps
- Seawater Pumps
- Oil Pumps
- Twin-Turbocharger Components
- Cooling-System Components
Major replacement components can also include:
- Crankshafts
- Connecting Rods
- Cylinder Head Assemblies
- Turbochargers
- Intercooler Components
- Heat Exchangers
- Common-Rail Fuel Components
- Electronic Engine Components
Which Propulsion Systems Can the Yanmar 8LV Use?
One advantage of the 8LV platform is its flexibility.
Yanmar states that the series is suitable for:
- Shaft-drive installations
- Jet-drive installations
- ZT370 sterndrive installations
All three output models can be paired with Yanmar's ZT370 sterndrive.
Depending on configuration, compatible transmission arrangements also include Kanzaki marine gears and other approved gear options.
What Marine Applications Use the Yanmar 8LV?
The combination of compact dimensions, relatively low weight, high rpm, twin turbochargers, and 320–370 mhp output makes the 8LV suitable for applications such as:
- Motor Yachts
- Sport-Fishing Boats
- Fast Cruisers
- Performance Boats
- Recreational Powerboats
- Planing-Hull Vessels
- Patrol and Service Craft
- Light Commercial Vessels
- New-Build Projects
- Repower Projects
Yanmar specifically positions the compact 8LV architecture for both new builds and repowers.
Which Yanmar 8LV Engine Do I Have?
Start by identifying the complete model designation.
Typical models include:
Yanmar 8LV320
Yanmar 8LV350
Yanmar 8LV370
Sterndrive configurations may include the Z designation.
When requesting Yanmar 8LV Marine Engine Spare Parts, provide:
- Complete engine model
- Engine serial number
- Existing part number
- Component description
- Quantity required
- Rated power
- Shaft, jet, or sterndrive configuration
- Marine gear model where applicable
- Vessel-control configuration
- Clear photographs of the existing component
- Delivery country or port
This information is especially important for common-rail injectors, fuel-system components, twin turbochargers, cylinder-head components, seawater pumps, heat exchangers, electronic controls, sensors, starter motors, alternators, and transmission-related components.