Doosan L086TIH Heavy-Duty Commercial Marine Diesel Engine

Description

Propel loaded coastal gillnetters using the Doosan L086TIH Marine Diesel Engine heavy-duty commercial package built for fishing vessels and passenger ferries. Displacing 8.1 liters across six inline cylinders, this turbocharged intercooled plant produces 285 brake horsepower at 2100 RPM. Mechanical fuel injection combines with two valves per cylinder to yield dependable continuous shaft torque in heavy sea conditions.

Formed from high-grade gray cast iron, this block integrates replaceable wet cylinder liners and a forged alloy crankshaft supported by seven main bearings. Engine sea utilities include a heavy 70/30 cupronickel shell heat exchanger protected by replaceable sacrificial zinc pencils. Fuel lines connect to a #8 JIC flare inlet while raw sea water enters via a 2.5-inch hose barb. Bare engine weight measures 1,740 lbs, housed in an SAE #1 bell with a 22-quart oil pan.

Key Features of Doosan L086TIH

Commercial fishermen and ferry superintendents buy Doosan L086TIH inboard engine packages to secure dependable mechanical propulsion without delicate computer modules. The 8.1-liter platform outputs massive low-rpm shaft torque to spin heavy propellers through turbulent tidal rip currents.

• Mechanical inline fuel injection pump meters fuel with exact precision to operate on variable grade marine fuels.
• Wastegated turbocharger boost geometry refines Doosan L086TIH turbocharger efficiency when hauling heavy net gear offshore.
• Gear-driven bronze raw water pump circulates 50 gallons per minute through the tube heat exchanger.
• Viscous crankshaft vibration damper protects downstream marine reduction gears from cyclical diesel combustion shocks.
• Duplex spin-on fuel filter manifolds allow safe filter element swaps while remaining underway offshore.
• Water-jacketed cast iron exhaust manifold keeps engine room ambient temperatures within safe limits.
• Mechanical instrument senders transmit oil pressure and coolant temperature readings straight to analog bridge panels.

Continuous Torque Marine Thermal Dynamics

Producing 820 lb-ft continuous torque at 1,400 RPM, this heavy-duty commercial diesel swings large diameter wheels to maintain headway against steep head seas. Operating coolant temperatures stay regulated between 160°F and 185°F under continuous commercial operation. Direct mechanical fuel injection ensures uniform cylinder combustion pressure, preventing thermal fatigue on valves and piston crowns. Sea water heat rejection totals 11,800 BTU per minute at continuous rating. Specific fuel consumption rates at 0.350 lb per horsepower-hour, holding bunker expenses down across continuous commercial work schedules.

Engine Stringer Exhaust Installation Clearance

Naval architects must preserve a 3.0-inch vertical drop below the deep oil pan to clear engine stringer frames. The raw water discharge elbow connects to a 5.0-inch wet exhaust line in compliance with ABYC P-1 safety specifications. Heavy elastomer shear mounts absorb engine vibration while locking transmission shaft coupling alignment in place.

Shift Routine Scheduled Maintenance Protocol

Mechanical throttle and governor linkages provide responsive engine control when docking commercial fishing vessels in crowded harbor berths in gusty winds. This heavy commercial marine diesel is not engineered for high-rpm racing hydroplanes, direct abrasive river sand dredging, or dry exhaust piping runs lacking cooling sea water injection.

• Inspect raw sea water pump impellers and clear debris from intake strainers each shift.
• Drain primary fuel water separator bowls and test crankcase lube oil levels every 50 hours.
• Replace secondary spin-on fuel filters and inspect heat exchanger sacrificial zinc anodes every 250 hours.

Commercial Warranty Factory Crate Manifest

Doosan backs this heavy-duty commercial propulsion engine with a 2-Year or 3,000-Hour commercial marine limited warranty. The heavy wooden export crate includes the base engine block, four resilient vibration isolator mounts, an analog instrument panel harness, an oil pan drain siphon hose, and a comprehensive factory technical service manual.