Yanmar 4LV195 Compact Inboard Diesel Engine

Description

High-grade parent bore cast iron with integrated stiffening ribs forms the durable crankcase inside the Yanmar 4LV195 Inboard Diesel Engine. Displacing 2.755L across 4 vertical cylinders, this high-output diesel produces 195 BHP at 3,800 RPM and 155 BHP continuous at 3,640 RPM. Denso common-rail fuel delivery demands 2-micron filtration, and thermo-shield protection guards wiring against radiant exhaust heat.

A parent bore high-grade cast iron block features chain-driven dual overhead camshafts actuating 16 valves. The single-piece cast iron cylinder head contains direct valve followers with crossflow intake ports. Electrical systems run on an isolated 12V 2-pole earth circuit with NMEA 2000 output, a 2.5 kW starter, and a 12V 130A alternator. Engine envelope measurements span 39.4in long, 29.7in wide, and 30.4in high, weighing 785 lbs with gearbox. Oil pan capacity holds 2.11 US gal.

Key Features of Yanmar 4LV195

Fast planing boat owners buy Yanmar 4LV195 compact inboard diesel engines to equip sport tenders and center consoles with high power-to-weight performance. Marine yards choose this package for commercial workboat diesel engine repower installations in patrol craft.

• Denso common-rail fuel injection operates at 2,500 bar pressure to optimize fuel burn
• Turbochargers with seawater-cooled charge air intercoolers force dense air into cylinders for instant torque
• Tubular freshwater heat exchangers protect internal cast iron water jackets from raw seawater corrosion
• High-output 12V 130A alternators recharge large marine house battery banks during harbor transits
• NMEA 2000 CAN-bus data networks stream engine parameters straight to modern helm multifunction displays
• SAE 4 flywheel housings connect directly to Yanmar KM4A1, ZF 45A, or ZT370 sterndrives
• Rigid chain-driven overhead camshafts maintain exact valve timing across all operating RPM ranges

Bench Dynamometer Load Test Output

Dynamometer test records confirm 195 BHP peak output at 3,800 RPM and 155 BHP continuous output at 3,640 RPM under pleasure craft ratings. Turbo boost pressure stabilizes at 1.70 bar during continuous full-power runs. Freshwater cooling circuits hold engine block temperature at 182°F under sustained maximum power dyno pulls. Engine oil pressure maintains 55 PSI across operational engine speeds. Shaftline installation permits up to 15° static inclination angles. Crankshaft journal runout remains below 0.0004in TIR to protect bearings against deflection fatigue. Exhaust temperatures stay below 1,180°F during full power runs.

Field Operation Maintenance Service Rules

Electronic throttle controls provide light lever action with under 2 lbs of hand resistance. Do not install this 3,800 RPM common-rail engine in heavy slow-speed displacement push-boats or vessels operating in shallow mud shallows without raw-water strainers. Operators must supply clean ultra-low sulfur fuel and maintain 2-micron fuel water separator filtration to protect high-pressure fuel pumps.

• Drain engine oil and change spin-on oil filter cartridges every 250 operating hours
• Inspect raw water pump impellers and check heat exchanger zinc anodes every 250 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 4LV195 diesel engine core, KM4A1 marine gearbox, 12V 130A alternator, 2.5 kW starter motor, flexible vibration mounts, digital display panel, wiring harness, and factory technical manuals.