Main Engine 4-Stroke · Main Engines (4-Stroke)
The Daihatsu DC-17 is a medium‑speed, trunk‑piston main engine (5‑ or 6‑cylinder L‑configuration) delivering up to 560 kW at 1000 rpm and capable of running on HFO or MGO.
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| Cylinder liner/piston inspection | typically every 12,000-16,000 running hours - confirm against maker's manual |
|---|---|
| Fuel injector overhaul | typically every 4,000-8,000 hours depending on fuel quality |
| Turbocharger overhaul | typically every 12,000-16,000 hours |
| Lube oil analysis | every 500-1,000 hours or per class requirement |
| Main/crankpin bearing inspection | typically every 8,000-12,000 hours |
| Crankshaft deflection check | at every annual/intermediate survey |
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 0.3-0.5% of nominal bore diameter as a general trunk-piston guideline - confirm against engine manual |
|---|---|
| Piston ring gap (installed) | typically 0.8-1.5 mm for this bore class - confirm against maker's manual |
| Main bearing clearance | typically 0.15-0.35 mm depending on journal size - confirm against maker's manual |
| Crankshaft deflection | trend over successive readings matters more than a single value; typically flagged once change exceeds the maker's stated tolerance |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Typically enrolled under Continuous Machinery Survey once eligible; class expects logged crankshaft deflections, cylinder condition records, turbocharger overhaul history, and periodic functional testing of the overspeed trip, low lube oil pressure shutdown, and crankcase oil mist detector.
Estimated lifetime: Medium-speed trunk-piston engines of this class are typically designed around a major overhaul/renewal cycle in the 60,000-100,000 running hour range, with component-level overhauls occurring throughout - actual life depends heavily on fuel quality, load profile, and maintenance history
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