Diagnosis, repair, maintenance and overhaul on Cummins marine propulsion engines and generator sets — QSK, QSM, QSB, KTA and older N-series — carried out on board across Europe.
Cummins marine diesels turn up throughout the fleet: QSB and QSC in tenders, chase boats and smaller yachts; QSM11 and QSK19 in larger yachts, workboats and pilot vessels; KTA and N-series in older commercial installations that are still working hard. Parts support is strong, service data is detailed and the engines respond very well to disciplined maintenance — which also means most faults we see are traceable to fuel, cooling or a deferred service item rather than to the engine design.
| Family | Typical models | Where you find them |
|---|---|---|
| QSB / QSC / QSL | QSB6.7, QSC8.3, QSL9 | Tenders, chase boats, smaller yachts, auxiliaries |
| QSM | QSM11 | Yacht propulsion, workboats, commercial craft |
| QSK | QSK19, QSK38, QSK50 | Larger yachts, shadow vessels, heavy commercial propulsion and power generation |
| Legacy mechanical | KTA19, KTA38, NT/NTA855 | Older commercial vessels and generator sets |
Every job produces a record: readings taken, values found, parts fitted and recommendations for the next interval, written per vessel. Combined with scheduled maintenance, oil analysis and an alignment check after any drivetrain work, that is what keeps a Cummins installation reliable at high hours.
QSB, QSC, QSL, QSM11 and the QSK family (QSK19, QSK38, QSK50), plus legacy mechanical engines such as KTA19, KTA38 and NTA855, and Cummins-powered generator sets. Send the model and serial for confirmation.
Often we can narrow it substantially by phone or WhatsApp: the code, the conditions in which it appears and a few readings from the crew usually identify the system involved. That decides whether a visit is needed and what parts to bring.
Yes — cleaning, pressure testing and renewal. On engines used in warm seawater or left standing, aftercooler corrosion is one of the most common causes of lost power and high exhaust temperatures.
Top-end and in-frame overhauls are routinely done in situ where access allows, with liners, pistons, rings and bearings renewed to Cummins tolerances and every measurement recorded.
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 codes. We will tell you what the code actually points at and what we would measure first.