Main Engine 2-Stroke · Main Engines (2-Stroke)
The MAN 9S35ME-B9 is a low‑speed, 9‑cylinder crosshead two‑stroke diesel engine delivering about 7 110 kW at 167 rpm, designed for main propulsion on medium‑size merchant vessels. As a Main Engine (2-Stroke Crosshead), it is normally installed in the main engine room as the principal propulsion prime mover, normally connected directly or through the shaft line to the propeller. In that role, its primary purpose is to convert fuel energy into low-speed or marine propulsion torque for continuous vessel propulsion. Two-stroke crosshead main engines use separate crosshead and crankcase arrangements with scavenge-air and cylinder-lubrication systems, distinguishing them from trunk-piston four-stroke engines. For exact ratings, dimensions, settings, capacities, materials and variant-specific limits, refer to the manufacturer documentation for the exact figure.
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What our service work and the manufacturer documentation say about keeping this model running.
Trend cylinder exhaust temperatures, scavenge condition, lubrication, bearing temperatures, pressures and load balance. Inspect piston, liner, exhaust valve, fuel equipment, scavenge spaces, turbocharging system and bearings according to the maintenance plan. Investigate metal debris, persistent cylinder imbalance or abnormal scavenge deposits promptly. Refer to the manufacturer documentation for the exact figure for clearances, pressures, wear and adjustment limits.
Carry fuel-injection service parts, cylinder-lubrication components, piston-ring and valve service items, filters, sensors, gaskets, O-rings and bearing or sealing spares identified as critical for the installed engine.
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