Yanmar 8LV-370Z Sterndrive Marine Diesel Engine

Description

Craving 370BHP top speeds and quiet hydraulic shifting on an offshore sport cruiser? The Yanmar 8LV-370Z Sterndrive Engine pairs a twin-turbocharged 4.460L V8 diesel with the ZT370 hydraulic clutch outdrive producing 370 BHP at 3,800 RPM. Common-rail fuel delivery requires 2-micron filtration, and the steerable outdrive demands regular gear oil changes to safeguard clutch plates.

A parent bore cast iron block integrates with aluminum alloy 4-valve cylinder heads to balance strength and weight. Dual overhead camshafts actuate 32 valves driven by a steel timing chain. Electrical systems run on an isolated 12V marine ground with CAN-bus VC10 integration, a 3.0 kW starter, and a 12V 180A alternator. Dimensions span 36.0in long, 32.3in wide, and 30.7in high, weighing 1,179 lbs. Oil pan capacity holds 2.64 US gal.

Key Features of Yanmar 8LV-370Z

Extreme performance boaters buy Yanmar 8LV-370Z sterndrive marine diesel engine packages to equip 30ft to 44ft dayboats with high power density and smooth shifting. Marine yards choose this package for commercial workboat diesel engine repower installations in high-speed security interceptors.

• Twin turbochargers with water-cooled intercoolers force dense charge air into cylinders for instant torque
• Piezoelectric common-rail fuel injection operates up to 2,000 bar to eliminate soot on gelcoat transoms
• High-output 12V 180A marine alternators replenish large deep-cycle house battery banks during harbor transits
• Closed freshwater cooling loops protect aluminum heads and cast iron water jackets from ocean brine
• Yanmar ZT370 sterndrives feature hydraulic clutch engagement to eliminate mechanical clunk into gear
• Dual counter-rotating DuoProp propellers provide true straight-line tracking without steering wheel torque pull
• CAN-bus VC10 electronic vessel controls provide smooth fly-by-wire throttle and transmission shifting

Bench Dynamometer Load Test Output

Dynamometer test records confirm 370 BHP peak output at 3,800 RPM and 315 BHP continuous output at 3,600 RPM. Twin turbo boost pressure stabilizes at 1.90 bar during continuous full-power runs. Freshwater cooling circuits hold engine core temperatures steady at 180°F under sustained maximum power dyno pulls. Engine oil pressure maintains 55 PSI across operational engine speeds. Sterndrive trim permits up to 30° static trailering angles. Crankshaft journal runout remains below 0.0004in TIR to protect bearings against deflection fatigue. Exhaust temperatures stay below 1,220°F during full power runs.

Field Operation Maintenance Service Rules

Electronic CAN-bus helm controls provide light lever action with under 2 lbs of hand resistance. Do not install this 3,800 RPM sterndrive package in heavy slow-speed displacement push-boats or vessels operating in shallow mud flats without raw-water strainers. Operators must supply clean ultra-low sulfur diesel fuel and inspect ZT370 outdrive drive bellows regularly to prevent water intrusion.

• Drain engine oil and change spin-on oil filter cartridges every 250 operating hours
• Inspect ZT370 sterndrive gear oil, drive bellows, and sacrificial zinc anodes every 100 hours
• Replace the primary 2-micron fuel water separator filter cartridge every 250 engine hours

Factory Warranty Shipment Parts Manifest

Yanmar Marine provides a 2-Year limited warranty backed by 3-Year major component structural coverage. The shipment crate contains the 8LV-370 diesel core, Yanmar ZT370 sterndrive outdrive unit, transom shield kit, 12V 180A alternator, 3.0 kW starter, VC10 electronic helm harness, and factory technical manuals.