Main Engine 4-Stroke · Main Engines (4-Stroke)
The Bergen C25:33L8 is an 8‑cylinder, medium‑speed (1000 rpm) 4‑stroke diesel engine delivering up to 3 MW, available in diesel, heavy fuel oil and dual‑fuel configurations with IMO Tier II compliance.
Every value below comes from the manufacturer datasheet or class-society record on file for this model.
Photos, drawings and page previews from this model’s datasheet or catalog.
“The Bergen C25:33L has a compact footprint and excellent power-toweight ratio, making it ideal for vessels requiring reliable, responsive power in tight spaces. Silent resilient mounting ensures…”
Other models of the same equipment type, Bergen Engines first.
| Lube oil analysis | 500-1,000 running hours |
|---|---|
| Valve clearance adjustment | typically every 2,000-4,000 hours per manufacturer's manual |
| Fuel injector service | typically 6,000-10,000 hours, condition-based |
| Turbocharger overhaul | typically 12,000-20,000 hours or per turbocharger maker's interval |
| Major overhaul (piston/liner) | typically 16,000-24,000 running hours, condition and fuel-quality dependent |
| Cylinder liner wear | bauart-typical renewal once diametral wear exceeds roughly 0.3-0.4% of the 250 mm bore - confirm the exact figure against the Bergen instruction manual for this model |
|---|---|
| Main/big-end bearing clearance | manufacturer-specific; renew once clearance trends beyond the manufacturer's stated limit rather than continuing to run |
| Piston ring gap | typically in the low single-digit mm range for this bore class - confirm against the engine's own manual before ordering rings |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Main or auxiliary engines of this size are normally under Continuous Survey Machinery (CSM) or equivalent, with IMO Tier II compliance records, crankcase inspection logs, and bearing clearance history expected at survey. Confirm the specific notation applicable to the vessel and whether the engine is on CSM or a fixed periodical survey basis.
Estimated lifetime: Medium-speed 4-stroke engines of this bore class (250 mm) are typically designed for 100,000+ hours to major overhaul cycles over the vessel's life with proper maintenance, though individual wear parts are renewed on shorter condition-based cycles - confirm against Bergen Engines' design life documentation for the C25:33L8.
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