We service and repair Cummins Onan marine generator sets on yachts in Palma, Mallorca and across the Balearic Islands. Our engineers attend at berths, shipyards and anchorages. Book online, describe the fault and upload panel or equipment photos, or call our 24/7 line for a breakdown.
Emergency response
2 hours · 24/7
Assessment & quote
Within 2 hours
Coverage
Palma-based · mobile throughout the Balearics
Part of our service
GeneratorsCummins lists Onan Marine QD generator families from 4/5 kW through 40–110 kW in its marine generator catalogue, with 50 and 60 Hz variants shown. The exact model, frequency and rating need confirming before service is planned.
For the Onan Marine QD 4/5 kW model, Cummins specifies a water-cooled, two-cylinder, four-stroke Kubota diesel. Its product data also identifies an Onan alternator, so diagnosis should consider both engine and generating functions.
Cummins states that the Onan Digital Display provides diagnostics and engine and alternator information on the QD 4/5. That information, together with any displayed code, is useful evidence before testing begins.
Cummins directs owners to the model-specific operator manual for maintenance directions and intervals. It identifies oil and filter changes, battery and connection checks, and visual inspection among typical maintenance requirements.
We plan routine work from the model, serial number, running hours and manufacturer schedule. The visit can include the applicable fluid, filter, connection and condition checks.
We inspect the seawater strainer, raw-water flow, hoses, clamps, heat exchanger condition and evidence of leaks. This is important during Mallorca’s warm-water operating season.
We test battery condition, cable voltage drop, starting and preheat circuits, fuel supply and control indications. We record the symptom before changing settings or replacing components.
We investigate no-output, low-output and breaker-trip reports with safe electrical checks of the generator output, protection devices and connected load. The yacht’s changeover arrangement is included where relevant.
After winter lay-up, we inspect the seawater side, batteries, connections, fluids, hoses and exhaust connections, then run and test the set under suitable load. Any fault found is reported before the yacht returns to use.
Book online, upload photos of the problem and our AI technical assistant asks the follow-up questions an engineer would ask. Our team receives a structured job brief, so the right technician arrives with the right parts.
Book online with photos| What you notice | Usual cause |
|---|---|
| It cranks but will not start. | We first check battery state and cable connections, control and preheat operation, fuel level and supply, and any panel indication. We then test the starting and fuel systems methodically. |
| It starts, then stops and shows an alarm. | We record the displayed code or lamp pattern and review available fault history before resetting it. Initial checks cover cooling-water flow, fluid levels, engine-protection inputs, wiring and the conditions when the shutdown occurred. |
| The generator is running but there is no usable AC power. | We check the line circuit breaker, generator output and frequency, then isolate whether the issue is within the set, distribution or connected load. Electrical testing is carried out only with the system made safe. |
| The temperature is rising or there is little water at the exhaust. | We check the seawater intake position, strainer for debris, raw-water flow, hose condition and leaks first. We then investigate the pump, heat-exchange side and other causes of restricted cooling flow. |
This is a guide, not a diagnosis. If anything affects safety, stop and call us on +34 971 251 374.
The more of this we have, the better our chances of arriving with the right parts. The online booking asks for it step by step.
Yes. Our engineers can attend your yacht at a berth, shipyard or anchorage in Mallorca and throughout the Balearic Islands, subject to safe access and the job scope. Send the generator model and serial number, running hours, any alarm code and the yacht’s location. This lets us prepare the visit and discuss the fault before attendance.
A service is planned from the generator’s model-specific manufacturer schedule and running hours. It can include the usual maintenance work indicated in the operator information, such as oil and filter changes, battery and connection checks, and inspection for leaks. We also check the seawater side, hoses and clamps, exhaust connections, and operation under load where conditions allow.
Reduce or remove non-essential electrical load if it is safe to do so, then record the fault code or take a clear photo of the panel before resetting anything. Do not continue to run a set that has a cooling-water issue, fluid leak, abnormal noise or repeated shutdown. Tell us what happened, the running hours and your location. For a breakdown, call the 24/7 emergency line.
Need it fixed?
Tell us what's wrong — by phone, WhatsApp, or online with photos.
Cummins Onan and other product names are trademarks of their respective owners. They are used here only to identify the equipment we work on.