OceanSphere
Engines
⚓ 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
🔧 2 verified suppliers & service companies for Daihatsu in the Maritime Network Find suppliers →
Is Daihatsu your company? Claim this page
Daihatsu

6DE20 GenSet

Daihatsu Diesel DK-20 Marine Auxiliary Series — Marinediesel, Bohrung 200 x Hub 300 mm, 720, 750, 900 rpm, 400-1020 kW (3DK-20: 450 kW / 5DK-20: 560-800 kW / 6DK-20: 760 kW / 8DK-20: 1020 kW). Brennstoff: Marine Diesel Oil (MDO) up to 700 mm²/s at 50°C; Heavy Fuel Oil (HFO). Status: Production/Active service in marine auxiliary power applications. Verifiziert, Datenblatt verlinkt.

750.0 kW
Power
Per Hersteller-Datenblatt
Capacity
MDO/HFO
Medium

Engine Specifications

6
Cylinders
200 mm
Bore
300 mm
Stroke

Components & Design

Component data being added…

Technical Data

Type Vertical water-cooling direct injection 4-cycle diesel engine
Mean Effective Pressure (Pme) 2.16-2.45 MPa
Piston Speed @ 900 rpm 9.00 m/sec
Piston Speed @ 720 rpm 7.20 m/sec
6DK-20e Dry Weight 16.0 tonnes (16000 kg)
5DK-20e Dry Weight 13.5 tonnes (13500 kg)
8DK-20e Dry Weight 22.0 tonnes (22000 kg)
Displacement (6-cylinder calculated) 56.5 liters (56500 cc)
Cooling System Jacket cooling with fresh water and sea water cooler option
Fuel Injection Direct injection with nozzle cooling system (critical for HFO operation)
Starting System Direct electric start (6DK+); Air motor start (5DK)
engine model 6DE20
configuration inline
rpm 900
frequency hz 60

🤖 Ask about this model

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

Common failures & inspection points

Fuel injection nozzle corrosion from improper cooling temperature control. Low temperatures cause sulfated corrosion on nozzle tip; high temperatures cause carb
www.dieselduck.info/forum/viewtopic...
Vibration and fatigue failure of fuel oil piping due to high-pressure oscillations; documented technical bulletin countermeasures exist
Cylinder ring groove wear and chromium plating degradation requiring renewal; chromium-plated piston rings must be replaced when original surface appears worn
O-ring degradation in cooling water connecting pipes leading to sealing failures and coolant leakage; improved O-ring specifications documented
Piston ring seal degradation causing insufficient compression pressure; non-airtight piston rings require maintenance or replacement
www.scribd.com/document/718173221/D...

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

Service & Maintenance

Maintain correct fuel viscosity and separator operation. Scheduled work includes fuel valve overhaul, exhaust valve inspection and piston ring inspection.

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 →

Replacement Parts

Recommended spares include fuel injection valves, exhaust valves, pump elements, filters, gaskets and piston rings.
Equipment Model #36909 · discontinued