"> Caterpillar MaK 6M43
OceanSphere
Engines
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Caterpillar MaK

6M43

The Caterpillar MaK 6M43 is a medium‑speed, six‑cylinder inline diesel engine delivering roughly 6 000 kW (≈8 200 hp) at 500–514 rpm, designed for main propulsion in vessels requiring 5–9 MW power.

Caterpillar MaK 6M43
5940.0 kW
Power

Engine Specifications

6
Cylinders
430 mm
Bore
610 mm
Stroke

Components & Design

Component data being added…

Technical Data

configuration L
rpm 500
fuel type HFO / MDO / MGO
technology Mechanical Fuel Injection
displacement l per cyl 88.6
rpm alt 514
power per cyl kw 1000
mean piston speed m s 10.2 (500 rpm) / 10.4 (514 rpm)
lube oil consumption g kwh 0.6
engine width mm 3400
intro year 1998
cycle 4-Takt
aspiration Turboaufgeladen + Ladeluftkuehlung
injection Direkteinspritzung
reversible False
market note >650 Motoren verkauft, >6.500 MW gesamt; Marktfuehrer 5-9 MW-Klasse
lifecycle Neubau eingestellt 2021/22 (Caterpillar MSE-Ausstieg)

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Common failures & inspection points

Zylinderkopfbolzen

Sichtpruefung auf Pitting/Korrosion, Bolzen-Anzugsmoment, Zylinder-zu-Zylinder-Druck (>5% = verdaechtig)

Auslassventile

EGT pro Zylinder (>30°C Abweichung = Ventil/Sitz-Verschleiss), Borescope der Abgasseite

Kolbenringe / Blowby

Kurbelgehaeuse-Druck <0,5 bar, Oelnebeldetektor, Fe im Oel-Trend (>100 ppm kritisch)

Gleitlager (Haupt-/Pleuel)

Oelanalyse Cu/Pb/Sn/Fe als TREND (Cu>30 + Pb>20 ppm = Lagerschaden), Lagerspiel ~30.000 h

Turbolader

Boost-Druck/-Temp pro Zyl., Turbo-Oel dT <10 K, Verdichter/Turbine per Borescope

Common-Rail / Einspritzung

Kraftstoffreinheit ISO 4406 (Ziel 18/16/13), Filter-dP, Duesen-Oeffnungsdruck/Spritzbild

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

Suppliers & Spare Parts

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Manuals

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Equipment Model #66537 · discontinued