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MAN Energy Solutions
5S46MC-C8
The MAN 5S46MC-C8 is a high‑power, five‑cylinder, two‑stroke low‑speed main engine delivering up to 15 500 kW at 129 rpm, featuring camshaft‑controlled fuel injection and variable injection timing for efficient operation across a range of fuels.
15500.0 kW
Power
Engine Specifications
5
Cylinders
460 mm
Bore
1932 mm
Stroke
15,500 kW
MCR Power
129.0 rpm
MCR RPM
2-stroke
Stroke Type
Family: MAN B&W MC/MC-C
· Tier: Tier II
· Fuel: HFO, VLSFO, MDO
Inspector Detail
✓ verified
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Designation decoded
5 cylinders, S=Super-Long-Stroke, 46=bore 460 mm, MC=mechanically controlled (camshaft), C=Compact, 8=Mark 8.
Background
5-cylinder MC-C with 460 mm bore and 1,932 mm stroke. Mechanical camshaft control, predecessor of the ME series. Legacy fleet on small cargo ships and coastal tankers.
Calculated metrics
Stroke To Bore Ratio
4.2
Inspector checklist
Running gear & tribology
- Cylinder liners: stroke-to-bore ratio 4.2, scavenge port inspection
- Piston rings: butt clearances, MC-C ring geometry
- Crosshead: temperature, bearing clearances
Camshaft control
- Camshaft: cam profiles, wear
- Fuel pumps: plunger, VIT setting
- Exhaust valve: mechanical actuation, buffer pressure
- Cam box: oil, roller levers
Fuel system
- Injection valves: nozzles, opening pressure
- Purifier, catfines with VLSFO
Sealing systems
- Stuffing boxes: drainage
- Exhaust valve: valve seat, rotocap
- Scavenge air box: drainage
Turbocharger
- Single unit, cleaning
- Auxiliary blower
Logbook reference values
| Parameter | Expected | Deviation means |
|---|---|---|
| Exhaust gas temperature after cylinder | 350-425 °C at MCR | >20 °C spread |
| Pmax | As per shop test ±3 bar | Spread >5 bar |
| Scavenge air pressure | 2.3-3.0 bar abs | Too low |
| Cylinder oil feed rate | 0.8-1.2 g/kWh | Adjust to BN |
Common Failure Modes
Camshaft wear
Symptoms: Timing drift, spread
Causes: Long-term abrasion, Lubrication
Preventive: Cam profiles at docking.
Fuel pump wear
Symptoms: Power loss
Causes: Catfines, Long-term operation
Preventive: Fuel quality, pump inspection.
Turbocharger failure
Symptoms: Power loss
Causes: Fouling
Preventive: Cleaning.
Expert tips
- 💡 MC-C phase-out generation — consider ME retrofit
- 💡 Check and document VIT manually
- 💡 VLSFO without electronic compensation: BN changeover critical
Related components
Camshaft
Fuel pumps (VIT)
Turbocharger
Cylinder lubrication
Scavenge air cooler
Classification & regulatory
IMO Tier I/II. EEXI possibly EPL.
Reference content for inspector orientation. Always verify against manufacturer's manual, latest service letters and class society requirements.
Other Cylinder Configurations 50
5L35MC-C8
5 cyl
· 6,450 kW
5L42MC-C8
5 cyl
· 10,100 kW
5L60MC-C8
5 cyl
· 21,000 kW
5L70MC-C8
5 cyl
· 31,150 kW
5L80MC-C8
5 cyl
· 42,000 kW
5S26MC-C8
5 cyl
· 3,700 kW
5S35MC-C8
5 cyl
· 7,650 kW
5S42MC-C8
5 cyl
· 12,950 kW
5S50MC-C8
5 cyl
· 18,650 kW
5S60MC-C8
5 cyl
· 28,250 kW
5S65MC-C8
5 cyl
· 35,000 kW
5S70MC-C8
5 cyl
· 40,400 kW
5S80MC-C8
5 cyl
· 51,000 kW
5S90MC-C8
5 cyl
· 64,350 kW
6K80MC-C8
6 cyl
· 43,500 kW
6K90MC-C6
6 cyl
· 30,780 kW
6K90MC-C8
6 cyl
· 56,700 kW
6K98MC-C8
6 cyl
· 85,020 kW
6L35MC-C8
6 cyl
· 7,740 kW
6L42MC-C8
6 cyl
· 12,120 kW
6L60MC-C8
6 cyl
· 25,200 kW
6L70MC-C8
6 cyl
· 37,380 kW
6L80MC-C8
6 cyl
· 50,400 kW
6S26MC-C8
6 cyl
· 4,440 kW
6S35MC-C8
6 cyl
· 9,180 kW
6S42MC-C8
6 cyl
· 15,540 kW
6S46MC-C8
6 cyl
· 18,600 kW
6S50MC-C8
6 cyl
· 22,380 kW
6S50MC-C8.2
6 cyl
· 9,960 kW
6S60MC-C8
6 cyl
· 33,900 kW
6S65MC-C8
6 cyl
· 42,000 kW
6S65MC-C8.2
6 cyl
· 16,440 kW
6S70MC-C8
6 cyl
· 48,480 kW
6S80MC-C8
6 cyl
· 61,200 kW
6S90MC-C8
6 cyl
· 77,220 kW
7K80MC-C6
7 cyl
· 28,980 kW
7K80MC-C8
7 cyl
· 50,750 kW
7K90MC-C8
7 cyl
· 66,150 kW
7K98MC-C7.1
7 cyl
· 40,040 kW
7K98MC-C8
7 cyl
· 99,190 kW
7L35MC-C8
7 cyl
· 9,030 kW
7L42MC-C8
7 cyl
· 14,140 kW
7L60MC-C8
7 cyl
· 29,400 kW
7L70MC-C8
7 cyl
· 43,610 kW
7L80MC-C8
7 cyl
· 58,800 kW
7S35MC-C8
7 cyl
· 10,710 kW
7S42MC-C8
7 cyl
· 18,130 kW
7S46MC-C8
7 cyl
· 21,700 kW
7S50MC-C8
7 cyl
· 26,110 kW
7S60MC-C8
7 cyl
· 39,550 kW
Components & Design
Component data being added…
Technical Data
unified from engine model
True
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Maritime Network →Manuals
-
operating
MAN B&W MC/MC-C Engine Operating Manual (OM-MC-C)MAN Energy Solutions
-
maintenance
MAN B&W MC/MC-C Maintenance Manual (MM-MC-C)MAN Energy Solutions
-
spare_parts
MAN B&W MC/MC-C Illustrated Parts Catalogue (IPC-MC-C)MAN Energy Solutions
-
project_guide
MAN B&W Project Guide MC/MC-C (PG-MC-C)MAN Energy Solutions
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Equipment Model #38194
· ✓ still in production