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Caterpillar MaK
Cat 3512B
The Caterpillar MaK Cat 3512B is a 12‑cylinder, medium‑speed (1800 rpm) four‑stroke diesel main engine delivering up to 840 kW, known for its robust construction and fuel flexibility (HFO, MDO, MGO).
840.0 kW
Power
Engine Specifications
12
Cylinders
170 mm
Bore
190 mm
Stroke
840 kW
MCR Power
1800.0 rpm
MCR RPM
4-stroke
Stroke Type
Family: Caterpillar/MAK M20C/M25C/M32C/M43C
· Tier: IMO Tier II
· Fuel: HFO, MDO, MGO
Other Cylinder Configurations 35
4L20
4 cyl
· 800 kW
6L M20C
6 cyl
· 1,110 kW
6L M25C
6 cyl
· 2,040 kW
6L M32C
6 cyl
· 3,360 kW
6L20
6 cyl
· 1,200 kW
6L32
6 cyl
· 3,480 kW
6M M43C
6 cyl
· 6,060 kW
6M M46DF
6 cyl
· 6,600 kW
Cat C280-6
6 cyl
· 2,100 kW
8L M20C
8 cyl
· 1,480 kW
8L M25C
8 cyl
· 2,720 kW
8L M32C
8 cyl
· 4,480 kW
8L20
8 cyl
· 1,600 kW
8L32
8 cyl
· 4,640 kW
8M M43C
8 cyl
· 8,080 kW
8M M46DF
8 cyl
· 8,800 kW
Cat 3508B
8 cyl
· 560 kW
Cat C280-8
8 cyl
· 2,800 kW
9L M20C
9 cyl
· 1,665 kW
9L M25C
9 cyl
· 3,060 kW
9L M32C
9 cyl
· 5,040 kW
9L20
9 cyl
· 1,800 kW
9L32
9 cyl
· 5,220 kW
9M M43C
9 cyl
· 9,090 kW
9M M46DF
9 cyl
· 9,900 kW
12V M43C
12 cyl
· 12,120 kW
12V M46DF
12 cyl
· 13,200 kW
12V32
12 cyl
· 6,960 kW
Cat 3512C
12 cyl
· 895 kW
Cat C280-12
12 cyl
· 4,200 kW
16V32
16 cyl
· 9,280 kW
Cat 3516B
16 cyl
· 1,120 kW
Cat 3516C
16 cyl
· 1,200 kW
Cat 3516E
16 cyl
· 1,305 kW
Cat C280-16
16 cyl
· 5,600 kW
Components & Design
Component data being added…
Technical Data
Bohrung
320 mm
Hub (Reihe)
480 mm
Hub (V-Form VM32C)
480 mm (teilweise Quellen: 420 mm, Widerspruch in Sekundärdatenbanken)
Typ
4-Takt Langsamläufer, Mittelschnellläufer, direkte Einspritzung, Turbogefeuert
Brennstoff
MDO, LBF, HFO, Ultra-Low-Sulphur Fuel (75% der Flotte auf HFO)
Einführungsjahr
1994
Turbolader
Hocheffiziente Ausführung, korrosionsfreies Gehäuse ohne Wasserkühlung
Abgasnorm
IMO Tier II (IMO II)
Marktabsatz
1600+ Einheiten seit 1994 (80% Propulsion, 20% Genset)
unified from engine model
True
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Common failures & inspection points
SFOC specification and boost pressure: different efficiency values depending on configuration and load range documented (177–179 g/kWh); optimization of fuel consumption
Turbocharger wear: High-efficiency design with 'low wear rate due to calibration ring' is described; durably constructed, but specific wear
Fuel quality: Required for HFO operation — contamination and sulphur content are risks; 75% of the fleet runs on HFO, therefore high management risk
Lagerschale-Überwachung: Caterpillar bietet optionales 'Crankshaft Bearing Condition Monitoring System' an — deutet auf Lagerverschleiß als Inspektionsthema hin
Cooling system corrosion at seawater inlet: Indications of typical marine corrosion in cooling systems with seawater cooling; anodes and flushing required
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.
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Maritime Network →Manuals
-
operating
MaK M43C Operating ManualCaterpillar Marine / MaK
-
maintenance
MaK M43C Maintenance ManualCaterpillar Marine / MaK
-
spare_parts
MaK M43C Spare Parts CatalogueCaterpillar Marine / MaK
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Equipment Model #38078
· ✓ still in production