MAN marine diesels demand precise setting and clean fuel to deliver their rated performance. We diagnose, service, repair and overhaul MAN engines on board — from i6 units to V8 and V12 installations — across Europe.
MAN marine engines — the i6 in-line units and the V8 and V12 families found in a great many planing and semi-displacement yachts — produce impressive specific output from compact packages. That output comes from high boost pressures, precise injection and tightly specified cooling. Which means two things in practice: they perform beautifully when set up and maintained to specification, and they show you very quickly when they are not. Fuel quality, charge air cooling and injection condition are where the majority of the faults we attend actually begin.
| Configuration | Typical series | Where you find them |
|---|---|---|
| In-line 6 (i6) | D2676 series | Semi-displacement yachts, commercial craft, auxiliaries |
| V8 | D2868 series | Planing yachts and fast craft |
| V12 | D2862 series | Larger planing and semi-displacement yachts |
| Legacy | Earlier D28xx / D2840 installations | Older yachts and commercial vessels still in service |
MAN publishes tight service values, and we work to them: valve clearances, injection settings, boost and charge air targets, torque figures. Every visit finishes with a sea trial or load run where possible, with readings recorded so the next engineer can see how the engine performed on the day. Full scope on our repair, maintenance and overhaul pages.
The i6 (D2676), V8 (D2868) and V12 (D2862) marine families, plus earlier D28xx installations still in service. Send the model and serial number and we will confirm the scope before travelling.
Most often charge air cooling, injector condition, exhaust back pressure or a fuel delivery limit — occasionally an electronic derate protecting the engine. All of these are measurable, which is why we take readings under load rather than guessing from symptoms.
Yes — injector testing and renewal, rail pressure diagnosis, high-pressure pump assessment and the fuel filtration and water separation upstream of it, which is where a surprising share of injection faults originate.
Top-end and in-frame overhauls in situ where access allows, with all critical dimensions measured against MAN tolerances and documented, then a controlled run-in and sea trial.
No. We are an independent marine engineering company and we say so plainly. We service, repair and overhaul these engines on their technical merits; for factory warranty work or authorised-network service, go to the manufacturer’s official dealer. Many owners and managers use us alongside the dealer network — independently for service and repair, and through the dealer where warranty requires it.
We source genuine and OEM-equivalent parts through established marine suppliers, and we tell you which is which. On critical internal components we recommend genuine parts; on many service items a quality equivalent is sound engineering at a better price. The choice stays yours.
Send the details below and you will hear back from an engineer, not a call centre. For a vessel that is stranded or on a tight departure slot, call +31 6 20743967 or message us on WhatsApp.
Send the model, running hours and the fault list. We will tell you what we would measure first and what it usually turns out to be.