Doosan L136T Turbocharged Commercial Marine Diesel Engine

Description

Overcome tidal drag in coastal channels with the Doosan L136T Inboard Marine Diesel Engine turbocharged configuration built for commercial tugs, gillnetters, and passenger tenders. Displacing 8.1 liters across six inline cylinders, this power plant produces 200 brake horsepower at 2500 RPM. Mechanical fuel injection pairs with turbocharging to generate strong mid-range shaft torque while sustaining low fuel consumption.

Cast from high-density gray iron, this engine block features 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 1,650 lbs, housed in an SAE #2 bell with an 18-quart oil pan.

Key Features of Doosan L136T

Coastal tug skippers buy Doosan L136T inboard engine packages to obtain dependable mechanical power for heavy towing and freight transit operations. The turbocharged six-cylinder platform outputs high continuous torque to swing large workboat wheels without thermal breakdown.

• Mechanical inline fuel injection pump meters fuel with exact precision to maintain continuous combustion efficiency.
• Wastegated turbocharger boost geometry refines Doosan L136T turbocharger efficiency when hauling loaded freight scows against tides.
• Gear-driven bronze raw water pump circulates 45 gallons per minute through the shell 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.

Torque Dynamics Marine Thermal Thresholds

Producing 510 lb-ft continuous torque at 1,400 RPM, this turbocharged diesel swings workboat 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 10,200 BTU per minute at continuous rating. Specific fuel consumption rates at 0.355 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 linkages provide responsive engine control when docking commercial workboats 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.