OceanSphereDEENPL
OceanSphereSERVICE
Service / Engines

Two-stroke main engine service and overhaul, worldwide on board or at the yard

Service and overhaul of two-stroke main engines, for example Sulzer and Wärtsilä RTA and RT-flex or MAN B&W, together with an experienced service engineer. Typical work: main bearings, crosshead bearings and cylinder units, with the inspections that belong to them. Jobs are carried out worldwide, on board or at a shipyard. We check every request personally and reply by e-mail.

Last updated: 24 October 2026
In short

What we do

  • Main bearings: inspection, clearance measurement, renewal
  • Crosshead and crosshead bearings, guide shoes: inspection and overhaul
  • Cylinder units: piston, piston rod and stuffing box, cylinder liner, cylinder cover and valves: inspection, overhaul and renewal
  • Crankshaft and crank web deflection readings, bearing clearance checks
  • Troubleshooting and condition assessment of running engines; damage analysis after incidents
  • Support during dry-dock or repair stays: planning, supervision, and organising parts, machining and spraying work
  • Sourcing of the spare parts needed for the job

OceanSphere organises the job and stays your single point of contact. The work itself is carried out together with vetted partner companies and experienced service engineers.

Engines

Machines, makers and components

Engine families

Sulzer / Wärtsilä RTA and RT-flex series; MAN B&W two-stroke engines (for example MC and ME series). Other two-stroke makes on request.

Components

Main bearings, crosshead pin and crosshead bearings, crankpin (bottom end) bearings, thrust bearing, pistons and piston rods, stuffing boxes, cylinder liners, cylinder covers, exhaust valves, fuel pumps.

Typical reasons

Bearing temperature alarms, metal particles in lube oil, findings in a periodic inspection, scuffing or liner wear, damage after an incident, planned overhaul at a repair stay.

Service

How it works

01

Request

Describe the job in the form: machine, location, what is wrong or needed.

02

Review

We check every request personally and come back by e-mail, with questions if something is unclear.

03

Offer

You receive an offer with scope and conditions. A request is not an order.

04

Execution

Vetted partner companies and service engineers carry out the work, worldwide. You keep one contact person at OceanSphere.

Request this service

What we need from you

The more you send, the faster we can judge the job. Missing details are no obstacle: send what you have.

  • Engine maker, type, number of cylinders and engine number
  • Running hours since the last overhaul of the affected unit, if known
  • Symptoms or findings: alarms, oil analysis, inspection reports, photos
  • Port or yard and the time window of the stay
  • Whether spare parts are already on board
  • Manufacturer and type or model
  • Serial number or engine number (from the nameplate)
  • Photos: nameplate, the part or machine, the damage
  • Port or location of the machine or vessel
  • Date or time window, and any deadline
  • Vessel name and IMO number (optional, kept internal, never published)
FAQ

Frequently asked questions

Which engines do you cover?

Two-stroke main engines such as Sulzer and Wärtsilä RTA and RT-flex and MAN B&W. Other two-stroke makes on request: tell us the type in the request and we check.

Where do the jobs take place?

Worldwide, on board in port or at a shipyard. We need the port or yard and the time window to plan the job.

Who does the work?

An experienced service engineer works with us as a partner. OceanSphere organises the job and stays your single point of contact.

Can you also supply the parts?

Yes. We source the parts through our supplier network and can involve machining, metal spraying or reconstruction if a worn part or bearing seat has to be restored.

What happens if damage is found during the job?

Findings and recommendations are reported to you, and further work is agreed with you before it is carried out.

What about class attendance?

Where class attendance is required, it is arranged with your class society. OceanSphere is not a classification society and coordinates the technical side.

Is a request binding?

No. A request is not an order. We check it personally and come back by e-mail with an offer or with questions. Orders are subject to our General Terms of Business.

Who carries out the work?

OceanSphere organises and coordinates the job. The work is done together with vetted partner companies and experienced service engineers. You have one contact person who keeps the overview.

Service

Request this service

Describe the job in the request form. We check every request personally and reply by e-mail. A request is not an order.

Opens the service request form with this service pre-selected.