Main Engine 4-Stroke · Main Engines (4-Stroke)
Marine propulsion systems often rely on robust diesel engines to power vessels through varied conditions. The Daihatsu 5LDK-26 is a diesel engine designed for marine applications, featuring a 4-stroke, turbocharged, and intercooled configuration with direct injection. This engine produces 1650 kW of power at 750 rpm and can operate on MDO or HFO with a viscosity up to 700 mm²/s at 50°C. It has a bore of 260 mm and a stroke of 380 mm, with five cylinders arranged in an L configuration. The engine adheres to IMO Tier II/III emission standards and employs a forced lubrication system with a water-cooled exhaust manifold. Common maintenance issues include connecting rod bolts hitting the frame in three-piece connecting rod models, ring groove wear necessitating chromium plating, and fuel injection pump tappet adjustment screw loosening. Additionally, pulse absorber degradation and crankshaft journal wear can occur in high-service applications, requiring regular renewal and on-site grinding, respectively.
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