YANMAR 8LV-370Z Marine Diesel Engine 370 HP
The YANMAR 8LV-370Z Marine Diesel Engine 370 HP is a high-performance, electronically controlled V8 diesel propulsion engine developed for sports cruisers, recreational powerboats, motor yachts, and compatible marine repowering projects.
Producing 370 metric horsepower (272 kW) at 3,800 RPM, the YANMAR 8LV-370Z combines a compact 4.46-litre, 90-degree V8 engine with electronically controlled common-rail fuel injection, twin turbochargers, charge-air cooling, and advanced marine engine management.
Designed for use with the YANMAR ZT370 sterndrive, the 8LV-370Z offers a complete Aquamatic-style sterndrive propulsion alternative for appropriately matched recreational vessels.
The ZT370 features hydraulically operated clutches and counter-rotating propellers, providing responsive shifting, strong propeller grip, and precise handling.
At JB Marine GmbH, customers can request quotations for the YANMAR 8LV-370Z, including engine-only configurations, compatible ZT370 sterndrive packages, electronic controls, installation accessories, warranty information, and international shipping.
Why Choose the YANMAR 8LV-370Z?
Powerful 370 HP V8 Diesel Performance
The YANMAR 8LV-370Z develops 272 kW (370 mhp) at 3,800 RPM, delivering substantial propulsion power from a compact eight-cylinder diesel engine.
Its 4.46-litre displacement and 90-degree V8 configuration provide a combination of high-output performance and smooth engine operation.
The engine is particularly suited to compatible recreational planing vessels requiring responsive acceleration and substantial diesel power.
Compact and Lightweight V8 Construction
One of the most attractive characteristics of the YANMAR 8LV family is its compact construction.
Despite its 370 HP output, the engine has a published dry weight of approximately 435 kg without the drive.
This relatively low engine weight can be advantageous when evaluating vessel balance, engine-room access, and marine repowering possibilities.
However, a complete sterndrive installation also includes the drive, transom assembly, steering components, propellers, and other equipment.
Advanced Denso Common-Rail Fuel Injection
The YANMAR 8LV-370Z uses an electronically controlled Denso common-rail fuel injection system.
This technology precisely controls fuel delivery according to engine operating conditions.
Key advantages include:
- Precise fuel injection
- Responsive throttle operation
- Smooth engine performance
- Efficient combustion
- Electronic engine monitoring
- Controlled fuel delivery
Proper fuel filtration and the use of manufacturer-approved diesel fuel remain essential for dependable operation.
Twin-Turbocharged and Intercooled Performance
The YANMAR 8LV-370Z uses twin turbochargers with charge-air cooling.
The turbochargers increase the amount of air delivered to the engine, while the intercooling system helps reduce compressed-air temperature.
This arrangement supports the engine’s high power output and responsive performance.
For planing vessels, strong acceleration and consistent power delivery are particularly valuable.
YANMAR ZT370 Sterndrive Technology
The YANMAR ZT370 sterndrive is a hydraulically shifted marine propulsion system designed for compatibility with the YANMAR 8LV engine family.
Its counter-rotating propellers help transfer engine power into thrust.
Potential benefits include:
- Responsive acceleration
- Smooth hydraulic shifting
- Precise steering response
- Strong propeller grip
- Efficient propulsion
- Integrated trim adjustment
- Improved low-speed handling
Actual performance depends on vessel displacement, hull design, propeller selection, drive ratio, and installation.
Electronic Vessel Control
The 8LV-370Z uses electronic engine management and is compatible with selected YANMAR Vessel Control systems.
YANMAR identifies the VC10 and VC20 control families among compatible products for the 8LV370.
Depending on the installed equipment, available functions may include:
- Electronic throttle and shift
- Engine monitoring
- Digital instrumentation
- Engine alarms
- Single- and twin-engine operation
- Compatible joystick maneuvering
- Multiple helm stations
The exact functions depend on the control-system generation and selected accessories.
Freshwater Cooling with Heat Exchanger
The YANMAR 8LV-370Z uses a freshwater cooling system with a seawater-cooled heat exchanger.
Freshwater coolant circulates through the engine, while seawater removes heat through a separate cooling circuit.
Routine maintenance should include inspection of:
- Engine coolant
- Seawater pump and impeller
- Heat exchanger
- Cooling hoses
- Seawater intake and strainer
- Charge-air cooling components
Proper maintenance is essential for dependable high-output diesel operation.
Technical Specifications
The following specifications refer to the manufacturer’s published YANMAR 8LV-370Z marine diesel engine.
| Specification | Details |
|---|---|
| Manufacturer | YANMAR |
| Engine model | 8LV-370Z / 8LV370(Z) |
| Engine series | YANMAR 8LV |
| Engine type | Four-stroke marine diesel |
| Engine configuration | 90-degree V8 |
| Number of cylinders | 8 |
| Displacement | 4.46 litres / approximately 272 cu in |
| Bore × stroke | 86 × 96 mm |
| Maximum crankshaft power | 272 kW / 370 metric HP |
| Rated engine speed | 3,800 RPM |
| Continuous crankshaft rating — published operating manual | 248 kW / 337 metric HP at 3,683 RPM |
| Fuel injection | Denso electronically controlled common rail |
| Aspiration | Twin turbocharged and intercooled |
| Cooling system | Freshwater cooling with seawater heat exchanger |
| Engine management | Electronic |
| Electrical system | 12V |
| Alternator | 12V / 180A |
| Starter motor | 12V / 2.7 kW |
| Starting assistance | Glow-plug system |
| Low idle speed | Approximately 550 RPM |
| Crankshaft rotation | Counterclockwise viewed from flywheel end |
| Lubrication | Enclosed forced-lubrication system |
| Dry weight without drive | Approximately 435 kg |
| Propulsion configuration | Sterndrive |
| Compatible sterndrive | YANMAR ZT370 |
| Sterndrive clutch | Hydraulic multiple-friction-plate clutch |
| Engine controls | Electronic |
| Published certifications | RCD 2, IMO Tier 2, EPA Tier 3, BSO II, EMC, SOLAS — configuration dependent |
| Intended application | Primarily recreational marine propulsion |
YANMAR rates this engine at 370 metric horsepower, equivalent to approximately 365 mechanical horsepower. Published overall dimensions differ according to whether the engine, gearbox, or sterndrive arrangement is being measured. Installation dimensions should be taken from the drawing for the exact package.
Compatible Sterndrives and Control Systems
YANMAR ZT370 Sterndrive
The YANMAR ZT370 is the manufacturer’s designated sterndrive for the 8LV-370Z.
The drive is rated for engine output up to 370 metric horsepower (272 kW) and uses a hydraulic multiple-friction-plate clutch.
Published ZT370 specifications include:
| Specification | YANMAR ZT370 |
|---|---|
| Drive type | Marine sterndrive |
| Rated input power | 272 kW / 370 mhp |
| Clutch type | Hydraulic multiple-friction-plate |
| Reduction ratios — general ZT370 range | 1.65:1, 1.78:1, 1.97:1, 2.18:1 |
| Ratios documented for 8LV installations | 1.65:1 or 1.78:1 |
| Propeller arrangement | Counter-rotating dual propellers |
| Dry drive weight | Approximately 112 kg |
| Trim zone | −6° to +10° |
| Steering angle | Approximately 30° to either side |
| Control compatibility | YANMAR electronic vessel controls |
Important: Although YANMAR lists four reduction ratios for the ZT370 family, the manufacturer’s operation manual identifies 1.65:1 and 1.78:1 for the 8LV series. Do not assume the other ratios are approved for an 8LV-370Z installation without manufacturer confirmation.
YANMAR VC10 Vessel Control System
The YANMAR VC10 provides electronic engine and propulsion control for compatible YANMAR installations.
Depending on configuration, the system can support:
- Electronic throttle and shift
- Engine monitoring
- Multiple control stations
- Single- or twin-engine operation
- Compatible digital instrumentation
YANMAR documentation identifies support for up to three control stations in suitable configurations.
YANMAR VC20 Vessel Control System
YANMAR also lists the VC20 among compatible control products for the 8LV370 engine family.
However, the actual control-system compatibility depends on the engine generation and installed electronic equipment.
An existing VC10 installation should not automatically be assumed interchangeable with a VC20 package.
YANMAR JC10A Joystick Control
The YANMAR JC10A joystick system is designed for compatible twin-sterndrive installations.
When the necessary steering and electronic equipment is installed, joystick maneuvering can simplify docking and close-quarters handling.
Joystick functionality is not automatically included with every engine or sterndrive package.
Single- and Twin-Engine Installations
The YANMAR 8LV-370Z can be used in suitable single- or twin-engine sterndrive installations.
For twin-engine vessels, both propulsion systems should be evaluated for matching:
- Engine specifications
- Sterndrive models
- Reduction ratios
- Propeller sets
- Electronic controls
- Steering equipment
Correct matching is essential for balanced propulsion performance.
Duty Rating and Marine Applications
The YANMAR 8LV-370Z is primarily intended for recreational marine propulsion.
The manufacturer’s operation manual identifies the 8LV series as intended for recreational use.
The manual also publishes a continuous crankshaft output of 248 kW (337 metric HP) at 3,683 RPM for the 8LV370(Z).
This figure is distinct from the engine’s maximum 370 mhp output.
Recreational Applications
Typical applications include:
- Sports cruisers
- Recreational powerboats
- Motor yachts
- Planing motor cruisers
- Recreational fishing boats
- Compatible twin-sterndrive installations
- Marine repowering projects
Commercial Applications
Commercial use requires additional attention to engine certification, operating profile, and duty requirements.
YANMAR specifically notes that the 8LV370 is not EPA Commercial certified.
Therefore, commercial suitability should never be assumed solely from the engine’s horsepower or the availability of related 8LV configurations.
Customers planning commercial operation should obtain confirmation of the applicable certification and duty requirements before purchase.
Price, Package Contents and Warranty
YANMAR 8LV-370Z Engine Price
Price: Contact JB Marine GmbH for a quotation.
The final price depends on engine condition, production year, sterndrive configuration, included accessories, and delivery destination.
Customers can request quotations for:
- YANMAR 8LV-370Z engine assembly
- 8LV-370Z with compatible ZT370 sterndrive
- Replacement 8LV-370Z engine
- Complete sterndrive propulsion package
- Twin-engine packages, subject to availability
Availability must be confirmed before ordering.
What’s Included in the Engine Package?
Depending on the specific product offered, an engine assembly may include:
- YANMAR 8LV V8 diesel engine
- Denso common-rail injection equipment
- Twin turbochargers
- Charge-air cooling components
- Freshwater cooling components
- Electronic engine-management equipment
- Starter motor
- Alternator
- Selected standard engine accessories
A complete sterndrive installation may additionally require:
- YANMAR ZT370 sterndrive
- Transom assembly
- Engine-to-drive coupling
- VC10 or compatible vessel control equipment
- Engine wiring harness
- Electronic throttle and shift controls
- Digital instrumentation
- Steering components
- Trim equipment
- Counter-rotating propellers
- Engine mounts
- Exhaust and cooling connections
Important: These are potential package components, not a guarantee that every item is included in a specific quotation.
Customers should request a detailed equipment list before placing an order.
Warranty Information
Warranty coverage depends on engine condition, manufacturing year, supply channel, and applicable manufacturer or seller terms.
Eligible new equipment may qualify for YANMAR manufacturer warranty coverage according to the relevant conditions.
Used, reconditioned, and older-stock equipment may carry different warranty arrangements.
JB Marine GmbH will confirm the applicable warranty terms in writing before purchase.
Frequently Asked Questions
How Much Horsepower Does the YANMAR 8LV-370Z Produce?
The YANMAR 8LV-370Z produces 370 metric HP (272 kW) at 3,800 RPM.
What Is the Displacement of the YANMAR 8LV-370Z?
The engine has a displacement of 4.46 litres and uses a 90-degree V8 configuration.
Is the YANMAR 8LV-370Z Twin-Turbocharged?
Yes. The engine uses twin turbochargers with charge-air cooling.
Does the 8LV-370Z Use Common-Rail Fuel Injection?
Yes. It uses an electronically controlled Denso common-rail direct-injection system.
What Sterndrive Is Compatible with the YANMAR 8LV-370Z?
The manufacturer identifies the YANMAR ZT370 sterndrive as compatible with the 8LV-370Z.
What ZT370 Reduction Ratios Are Available for the 8LV?
YANMAR’s ZT370 operation manual identifies 1.65:1 and 1.78:1 for 8LV-series installations.
How Much Does the YANMAR 8LV-370Z Weigh?
The published dry engine weight is approximately 435 kg without the drive.
The ZT370 sterndrive weighs approximately 112 kg, excluding other installation components.
Does the YANMAR 8LV-370Z Support Joystick Control?
Compatible twin-sterndrive installations may support the YANMAR JC10A joystick control system when fitted with the necessary steering and electronic equipment.
Is the YANMAR 8LV-370Z Suitable for Commercial Boats?
The engine is primarily intended for recreational use. YANMAR states that the 8LV370 is not EPA Commercial certified.
Commercial suitability must be confirmed for the intended operating region and duty cycle.
Can I Replace My Existing Sterndrive Engine with a YANMAR 8LV-370Z?
Potentially. Compatibility depends on the existing engine, sterndrive, transom assembly, engine mounts, steering system, electronic controls, cooling connections, and exhaust arrangement.
A professional repowering assessment is recommended.
Buy the YANMAR 8LV-370Z Marine Diesel Engine from JB Marine GmbH
Looking for a YANMAR 8LV-370Z 370 HP marine diesel engine for sale?
At JB Marine GmbH, customers can enquire about the YANMAR 8LV-370Z for sports cruisers, recreational powerboats, motor yachts, and compatible marine repowering projects.
Whether you’re replacing an existing diesel engine, sourcing a compatible ZT370 sterndrive, or purchasing a complete propulsion package, selecting the correct configuration is essential.
For an accurate quotation, please provide:
- Existing engine model and serial number
- Existing sterndrive model and serial number
- Vessel make and model
- Required quantity
- Required ZT370 reduction ratio
- Existing electronic control system
- Electrical system requirements
- Required propellers and accessories
- Delivery country and destination
Contact JB Marine GmbH today for YANMAR 8LV-370Z pricing, availability, compatible ZT370 sterndrive options, warranty information, and international shipping quotations.
Website: https://jbmarinegmbh.de/
