⚓ Working on this equipment?

Ask the AI troubleshooter, log your hours on board and turn them into invoice-ready service reports — for this exact model.

Start free — 14 days →

No credit card required

Is Caterpillar MaK your company? Claim this page

Caterpillar MaK

7L M25E

Name: Caterpillar MaK 7L M25E
Brand: Caterpillar MaK

The Caterpillar MaK 7L M25E is a low‑speed, inline‑seven cylinder marine diesel engine delivering ~2.1–2.3 MW at 720 rpm, featuring common‑rail electronic injection and Tier III NOx compliance.

2380.0 kW

Power

Engine Specifications

Cylinders

255 mm

Bore

400 mm

Stroke

Components & Design

Component data being added…

Technical Data

Hubvolumen (6M25) 122 Liter / 122000 cc

Spezifischer Brennstoffverbrauch (SFOC) 183-184 g/kW

Zylinderzahl 6, 8 oder 9 inline-Zylinder

Kurbelwellendrehzahl 720-750 U/min

Zylinderleistung 300-333 kW pro Zylinder

Bauart 4-Takt Diesel-Langhuber mit Turbolader (SCR-Ausfuehrung verfuegbar)

Komponentenreduktion ca. 40% weniger Komponenten als Vorgaengerserie

configuration L

rpm 720

fuel type HFO/MGO/Biofuel

technology Common Rail Electronic (Tier III)

displacement l per cyl 20.4

🤖 Ask about this model

One free question — answered like a marine engineer. No account needed.

Common failures & inspection points

Zylinderliner Verschlei und Ueberheizung

Zylinderliner auf Verschlei und Risse inspizieren; Kuehlanlagenfunktion pruefung

Kolbenringverschlei und Verschwelung (carbon deposits)

Rauchentwicklung beobachten; Kolbenkraft-Messung; Kompressionspruefung

Brennstoffeinspritzer Verschmutzung und Brennstoff-Carbon

Einspritzdruck / Sprayform pruefung; Brennstoff-Filterbestand; Brennstoffpolitur ggf. notwendig

Turbolader Schaedigungen durch hohen Abgasgegendruck

Abgasdruck-Messung; Verdichter/Turbinen-Sichtpruefung; OEM-spezifische Oelwechsel-Intervalle beachten

Ventiltiming Probleme und Einlass/Auslassventil-Ablagerungen

Ventilspiel + Ventilsitz-Verschlei pruefung; Einlass/Auslassventil-Reinigung; Dichtsitzpruefung

Type-general inspection and maintenance points for this equipment category — not model-specific.

Suppliers & Spare Parts

Direct links to manufacturer, datasheet, spare-parts portal and dealers — request access below.

📄 Request sourcing links & documents

🛠 Manage this equipment in your fleet

Cases, daily reports, timesheets and AI troubleshooting in the OceanSphere Marine app — free for 14 days.

Start free trial →

🔎 Suppliers & service for this equipment

Find manufacturers, repair shops and spare-part dealers in the Maritime Network — our global company directory.

Maritime Network →

Equipment Model #66523 · ✓ still in production