Yanmar 8LV-320Z – Marine Diesel Engine 320 HP

Description

Connecting a high-torque V8 engine block directly to a ZT370 sterndrive leg is straightforward with the Yanmar 8LV-320Z. This 4.46-liter twin-turbocharged motor delivers 320 horsepower at 3800 RPM, giving fast express cruisers and sportfishing hulls rapid acceleration. High-pressure common-rail fuel injection provides clean, quiet combustion, while an integrated hydraulic clutch inside the drive assembly ensures smooth gear engagement during tight harbor docking maneuvers.

A closed heat exchanger cooling loop protects internal cylinder passages from raw seawater exposure. The electrical package includes a 12V 180-amp alternator for high charging demand, VC10 electronic vessel controls, and a dry weight of 495 kg including the drive unit.

Key Specifications of the Yanmar 8LV-320Z Marine Diesel Propulsion Engine

• The 4.46-liter V8 engine produces 320 horsepower at 3800 RPM, giving planing hulls high power density and rapid acceleration.
• Twin turbochargers with water-cooled intercoolers deliver rapid air intake compression, ensuring quick throttle response across mid-range cruise speeds.
• Common-rail direct fuel injection optimizes atomization inside the combustion chamber, significantly reducing mechanical noise and exhaust smoke emissions.
• A closed freshwater heat exchanger loop isolates internal block waterways from corrosive raw seawater, maintaining consistent operating temperatures.
• The integrated ZT370 sterndrive package features a hydraulic clutch for precise gear selection under heavy engine torque loads.
• An onboard 12V 180-amp alternator delivers continuous electrical output to maintain heavy house battery banks and modern electronics suites.

Engine Performance and Engineering

V8 cylinder geometry combined with common-rail fuel management creates a quiet, responsive power package in this Yanmar inboard engine. Twin intercooled turbos feed high-density air into the 4.46-liter block, while VC10 electronic vessel controls manage digital throttle synchronization for twin-engine helm stations.

Why Choose the Yanmar 8LV-320Z Marine Diesel Propulsion Engine

Boat owners choose the 8LV-320Z marine engine for its integrated ZT370 sterndrive coupling and smooth 320 horsepower output. Its twin-turbocharged V8 architecture provides quick planing performance without typical diesel exhaust smoke. The combination of common-rail injection, a 180-amp alternator, and closed heat exchanger cooling makes it an ideal repower option for fast express cruisers.

Mounting and Compensation Considerations

Verify transom cutout dimensions and inner transom shield mounting clearances before positioning the sterndrive assembly. Ensure your raw water sea cock, intake hose, and exhaust riser drops meet cooling flow specs for a 320 horsepower V8 engine block.

Warranty and Support

Yanmar backs this sterndrive diesel package with a 2-Year Limited Recreational Warranty covering major engine block and drive assembly components. Mulmarine.com provides product-information support before purchase and assistance with order-related questions. Prior to freight shipment, staff verify the crated engine package against the confirmed order details. Review warranty eligibility and current coverage details on Mulmarine.com before placing your order.

Before Ordering the Yanmar 8LV-320Z Marine Diesel Propulsion Engine

Measure your engine compartment and transom shield area to confirm mounting clearance for a V8 sterndrive package. Verify your fuel line delivery diameter, return line routing, and battery cold cranking amps meet manufacturer requirements before completing your order.