Doosan L136T Turbocharged Commercial Marine Diesel Engine

Description

Meeting IMO Tier II marine exhaust standards without complex computers, the Doosan L136T Turbocharged Commercial Marine Engine produces 200 BHP continuous output at 2,200 RPM from an 8.1L displacement. This turbocharged inline-6 unit operates on mechanical controls, though mechanics must service the water-cooled exhaust manifold gaskets and maintain heat exchanger zinc inspection schedules in salt environments.

Casting architecture features an ASTM gray iron block fitted with replaceable wet sleeve cast iron liners. A monobloc cast iron head uses induction-hardened valve seats to survive high exhaust gas heat. The 24V isolated ground electrical package includes a 24V 5.0 kW starter motor and a 24V 50A alternator. Dry engine mass measures 1,653 lbs with dimensions of 52.0in length, 29.1in width, and 38.8in height. Sump oil volume reaches 5.5 US gal.

Key Features of Doosan L136T

Potting skiff operators buy Doosan L136T commercial engines to gain forced-induction towing torque for coastal aquaculture support craft. The bare bobtail power core mounts with Dong-I DMT 100 and ZF 220 marine reduction transmissions.

• Turbocharger paired with a water-cooled exhaust manifold lowers engine room radiant heat on small workboats.
• Mechanical inline injection pump with an all-speed governor ensures reliable operation without computer modules.
• Induction-hardened valve seats resist recession under continuous commercial throttle positions.
• Replaceable wet sleeve cast iron liners allow fast in-frame overhauls between seasonal fishing runs.
• Standard SAE 2 bellhousing couples flush to an SAE 11.5 flywheel drive plate.
• Tubular heat exchanger with bronze impeller seawater pump maintains thermal control under heavy tow loads.
• Isolated ground 24V electrical harness protects metal hull skins against aggressive electrolytic attack.

Dynamometer Turbocharged Load Test Limits

Dyno cell evaluation confirms 200 BHP continuous power at 2,200 RPM and 220 BHP intermittent output at 2,500 RPM. Continuous shaft torque reaches 477 ft-lbs at 2,200 RPM. Mechanical injection line pressure operates at 1,250 bar while the turbocharger generates 1.3 bar of boost. Exhaust temperatures inside the water-jacketed manifold remain below 1,020°F under full continuous load. Jacket coolant holds at 178°F through the tubular heat exchanger. Main crankshaft journal runout measures 0.0004in TIR, and oil pressure reads 50 PSI at 25° static tilt.

Coastal Workboat Operation Service Protocols

Throttle cable linkage requires 3 lbs of push-pull effort for firm mechanical speed adjustment. Do not install this medium-duty turbocharged diesel into lightweight planing speedboats or vessels requiring electronic CAN bus joystick stations. The continuous rating is tailored for commercial workboat diesel engine repower installations on heavy coastal potting craft and workboats.

• Drain engine lube oil and replace spin-on filters every 250 operating hours with 15W-40 oil.
• Change primary and secondary spin-on fuel filter elements every 250 operating hours to protect injection nozzles.
• Check and set mechanical valve lash clearances on all 12 valves every 1,000 run hours.

Commercial Marine Warranty Crate Details

Doosan supports this marine engine with a 1-Year or 2,000-Hour commercial marine warranty. The factory wooden crate includes the bobtail engine unit, 24V starter motor, 24V 50A alternator, rubber marine mounts, engine instrument panel with extension harness, water-cooled exhaust elbow, and comprehensive factory operator service manuals.