Yanmar 8LV-320Z Sterndrive Marine Diesel Engine

Description

Turn dual counter rotating sterndrive wheels with Yanmar 8LV-320Z Sterndrive Engine Package systems, engineered to power high-performance sport cruisers, fast offshore day yachts, and luxury runabouts up to 38 feet. Displacing 4.5 liters across eight V-configured cylinders, this twin-turbocharged diesel produces 320 horsepower at 3,800 RPM. Common-rail electronic fuel injection ensures quiet combustion, low smoke emissions, and smooth torque delivery.

High-strength cast iron forms the monolithic cylinder block, equipped with induction-hardened parent cylinder walls that resist scuffing under boost. The fresh water cooling system integrates an aluminum heat exchanger housing with a cupronickel tube bundle, charge air cooler, and bronze sea water pump. Dry package weight with ZT370 sterndrive is 1,179 lbs, supported by a 10.6-quart oil pan and 0.375-inch fuel line connections.

Key Features of Yanmar 8LV-320Z

Cruising skippers buy Yanmar 8LV-320Z inboard engine sterndrive packages to equip modern sports cruisers requiring rapid planing acceleration and precise helm maneuverability. The matching ZT370 hydraulic clutch sterndrive eliminates mechanical clunking while delivering proportional thrust control in tight slips.

• 320 horsepower rating drives deep-V hulls past 42 knots with clean acceleration.
• Hydraulic clutch inside ZT370 sterndrive permits smooth silent gear engagement without mechanical jerk.
• Twin turbocharger configuration generates immediate boost response from idle through top speed.
• Ninety-degree V8 block geometry delivers compact external dimensions and low center of gravity.
• Cast iron block architecture provides structural strength for continuous offshore duty cycles.
• Yanmar 8LV-320Z sterndrive efficiency provides exceptional fuel economy on long cruising legs.
• Heavy-duty vibration isolators absorb engine harmonics to protect boat stringer beds.
• Electronic Vessel Control integrates steering, joystick docking, and engine diagnostics on helm screens.

Combustion Dynamics Thermal Capacities

Dual thermostats regulate internal coolant temperatures between 174°F and 188°F under continuous planing operations. The V8 block develops 516 lb-ft of torque at 2,200 RPM, giving sports cruisers power to rise on plane without hesitation. Rated under M4 pleasure craft service, thermal heat rejection transfers 195 kW into raw sea water circuits. Specific fuel consumption averages 205 g/kWh, burning about 5.85 gallons per hour at standard yacht cruising speeds across open coastal waters under loaded trim.

Exhaust Integration Bay Clearances

Exhaust gases route through the sterndrive transom shield and propeller hub, meeting ABYC P-1 and USCG Title 46 marine standards. Mounting brackets align across 22-inch to 26-inch stringer centers, preserving 3.0 inches of clearance below the oil pan. Flexible elastomer mounts absorb vibration from the hull.

Service Schedules Application Constraints

Electronic steer-by-wire and CAN-bus control levers connect straight to the engine control unit for instantaneous transmission response. Operators inspect sterndrive bellows, verify fluid levels, and check belt drives prior to departure. This engine package is not engineered for offshore racing hydroplanes, surface drives, or raw water cooled bilges without fresh water heat exchangers.

• Inspect sterndrive bellows and oil level before each shift.
• Inspect and clean sterndrive sacrificial zincs every 100 hours.
• Change engine lube oil, drive gear oil, and filters every 200 hours.

Warranty Terms Package Manifest

Recreational buyers receive 2-Year limited warranty protection on base castings and sterndrive components. The shipping crate contains the engine, ZT370 sterndrive, transom shield module, digital helm display harness, manual oil extraction pump, and bound factory technical service documentation.