Yanmar 8LV-320 320HP Marine Diesel Propulsion Engine

Using verified common-rail direct injection and twin turbochargers, the Yanmar 8LV-320 delivers smooth V8 diesel power across all throttle ranges. Generating 320 horsepower at 3800 RPM from a 4.460-liter displacement engine block, this power unit drives express cruisers, sportfishers, and motor yachts. High-pressure fuel atomization cuts mechanical clatter at idle, while water-cooled intercoolers maintain dense air charge during sustained high-speed cruising.

A closed freshwater heat exchanger system regulates engine temperatures, keeping corrosive raw water away from internal block passages. Electrical hardware includes a high-output 12V 180-amp alternator, native NMEA 2000 digital output, and a trim dry weight of 435 kg (959 lbs) without marine gear.

Engine Performance and Engineering

Advanced electronic engine management and lightweight casting give this Yanmar inboard engine superior power density. Common-rail injection eliminates diesel clatter at low speeds, while digital VC10 controls provide seamless throttle synchronization on twin-engine vessel installations.

Why Choose the Yanmar 8LV-320 Inboard Marine Engine

Vessel owners choose the 8LV-320 marine engine for its compact 4.460-liter V8 block and smooth 320 horsepower output. Its common-rail injection technology and intercooled twin turbos deliver clean, smoke-free operation for express cruisers. With native NMEA 2000 networking, a 180-amp alternator, and a light 435 kg dry weight, it represents a modern repower choice.

Warranty and Support

Yanmar covers this propulsion unit with a 2-Year Limited Factory Warranty covering major engine block assembly defects. provides pre-purchase technical guidance and freight shipping customer support. Prior to freight shipment, staff verify the crated engine package against the confirmed order details. Review the applicable warranty information on before completing your order.

Before Ordering the Yanmar 8LV-320 Inboard Marine Engine

Measure your engine room compartment hatch opening and height to confirm fitting space for a V8 block. Verify your transmission gear ratio, shaft coupling layout, and NMEA 2000 display compatibility before completing your purchase.