Main Engine 4-Stroke · Main Engines (4-Stroke)
The Wärtsilä 12W26 is a medium‑speed, four‑stroke marine diesel main engine delivering about 4 200 kW at up to 1 000 rpm, notable for its common‑rail fuel injection and dual‑fuel (HFO/MGO) capability.
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| oil_change | 400-600 hours |
|---|---|
| fuel_filter_change | 1000-1500 hours |
| air_filter_change | 500-1000 hours |
| cylinder_head_overhaul | 12000-15000 hours |
| major_overhaul | 30000-36000 hours |
| piston_ring_gap | 0.5-1.0 mm |
|---|---|
| cylinder_liner_wear | 0.5-1.0 mm |
| crankshaft_bearing_clearance | 0.05-0.15 mm |
| camshaft_bearing_clearance | 0.05-0.15 mm |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Class surveyor typically checks engine performance, fuel consumption, and emissions, as well as inspecting critical components such as piston rings, cylinder liners, and turbochargers for wear and damage.
Estimated lifetime: 30000-36000 hours
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