Main Engine 4-Stroke · Main Engines (4-Stroke)
Marine auxiliary engines play a crucial role in powering various onboard systems and ensuring smooth vessel operation. The 5LDC-17A, part of Daihatsu’s DC-17A family, is designed to deliver reliable performance with its robust 4-stroke configuration. This engine features a bore of 170 mm and a stroke of 260 mm, providing a displacement of approximately 9,700 cc across its five cylinders. Operating at 900 rpm, the 5LDC-17A produces a maximum power output of 675 kW, making it suitable for applications requiring high efficiency and power density. The engine is versatile in fuel compatibility, supporting both Marine Diesel Oil (MDO) up to 700 mm²/s at 50°C and Heavy Fuel Oil (HFO). It has been designed with a focus on durability and maintenance, although certain areas require specific attention. Service Bulletins highlight the need for regular inspection and maintenance of the fuel injection valve, as well as the importance of applying the correct torque to the high-pressure block mounting bolts. Additionally, vibration reinforcement is necessary for the fuel main pipe to ensure long-term reliability. With a dry weight ranging from 10.0 to 11 tons, the 5LDC-17A strikes a balance between power and manageability, making it a reliable choice for marine auxiliary applications.
Do you have the manufacturer datasheet for this model? Send it with the enquiry form — we check it and name the source.
| Valve clearance check | per maker manual, typically every 2,000 running hours |
|---|---|
| Injector service | typically every 4,000 running hours |
| Turbocharger inspection | typically every 8,000-10,000 running hours |
| Lube oil analysis | every 250-500 running hours or per PMS |
| Piston/liner inspection | typically every 8,000-10,000 running hours |
Typical intervals for this design class, not the manufacturer’s figures for your model. The manufacturer’s manual is binding.
| Cylinder liner bore wear | typically up to about 0.3-0.4% of nominal bore diameter for this class before renewal is considered - confirm against the engine's own manual |
|---|---|
| Piston ring gap | typically 0.5-1.0 mm for this bore class - confirm against the engine's own manual |
| Main bearing clearance | typically 0.10-0.22 mm depending on journal size - confirm against the maker's tolerance table |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Falls under Continuous Survey Machinery or periodic survey; class reviews running hours against the maker's scheme and oil analysis trend. Where used as an auxiliary generator, protective device and insulation resistance testing on the connected generator is usually checked alongside the engine.
Estimated lifetime: Engines of this smaller bore class typically achieve 60,000-100,000+ running hours between major overhauls with proper maintenance; actual life depends heavily on load factor and maintenance history.
Free of charge — send us your request for Daihatsu equipment. Our team checks it and replies by e-mail.
Other models of the same equipment type, Daihatsu first.
Tell us what you need for this Daihatsu 5LDC-17A — a part, a service call, a second opinion. Are you Daihatsu? Claim this brand page.
Service engineer? Write the day report for this 5LDC-17A in OceanSphere Work — photos, hours and parts, as a PDF for the owner. Try it free for 14 days →
Yes. Specifications, documents and service notes for this model are readable without an account. An account adds saved searches and requests, nothing is taken away.
Yes. Tell us the manufacturer, the model and what you need — a person reads every request and replies by e-mail.
Send us the nameplate or the correct value. We check it against the manufacturer datasheet or class-society record and update the page.