Yanmar 6LY3-ETP – Inboard Diesel Engine 480 HP

Extracting high performance from a compact inline 6-cylinder footprint is achievable with the Yanmar 6LY3-ETP. Pushing 480 horsepower at 3300 RPM from a 5.813-liter engine block, this diesel motor drives express cruisers and fast charter boats with top-end speed. Electronic common-rail fuel injection delivers precise multi-stage fuel pulses, ensuring clean combustion and quiet operation across the entire powerband.

Closed freshwater heat exchanger cooling isolates internal waterways from saltwater exposure. Fitted with an SAE 3 flywheel housing, the engine features a 12V 80-amp alternator, forced oil lubrication, and a dry mass of 640 kg (1411 lbs).

Helm Use and Readability

High power density and 6-cylinder mechanical balance define the engineering of this Yanmar inboard engine. An 18-liter oil capacity with forced lubrication protects moving components during continuous high-rpm operation, while the water-cooled manifold minimizes thermal radiation.

Why Choose the Yanmar 6LY3-ETP Inboard Marine Engine

Boaters select the 6LY3-ETP marine engine for its peak 480 horsepower output from a compact 5.813-liter block. Its electronic common-rail technology and intercooled turbocharging provide rapid vessel acceleration without diesel smoke. Closed heat exchanger cooling and SAE 3 gear compatibility make it a premier choice for high-speed repower projects.

Warranty and Support

Yanmar backs this engine with a 2-Year Limited Recreational Warranty covering major engine block assembly components against defects. can assist with technical product details and freight delivery questions before purchase. The engine order is verified for visible package and documented accessory completeness before freight dispatch. Please review the warranty coverage and eligibility details on before purchase.

Before Ordering the Yanmar 6LY3-ETP Inboard Marine Engine

Measure your engine compartment hatch opening and height to confirm fitting space for a 5.813-liter block. Verify your transmission gear ratio, shaft coupling layout, and battery cold cranking amps before completing your purchase.