Start with how the generator is used
A marine generator is often treated as something that either starts or does not. In practice, the useful question is not whether it ran last weekend. It is whether the starting, charging, cooling, fuel and electrical systems around it are being checked in a way that matches how the vessel is used.
For a boat that sits on a marina berth most weeks, the generator may only run occasionally. For a vessel that spends time away from shore power, it may be part of the normal daily routine. Both patterns produce different servicing priorities.
Write down how often the generator runs, what it powers while it is running, and whether it is used for short top-ups or long periods under load. This gives a much better picture than an hours figure on its own.
Watch the signs between services
Some symptoms are easy to dismiss because the generator still starts. A slow start, a change in exhaust note, a new vibration, a fuel or oil weep, or a battery that needs more charging than before are all worth recording.
Electrical symptoms can be less obvious than mechanical ones. A generator may run but fail to deliver charge properly, produce unstable voltage, or trip a breaker when a particular load is applied. These are reasons to arrange a scheduled inspection rather than to keep running the set until it fails.
If the generator is used for charging batteries, note how quickly the batteries accept charge and whether that behaviour has changed. If it powers equipment directly, note anything that has become intermittent or noisy.
- How the generator starts compared with previous use.
- Any change in exhaust note, vibration or noise.
- Whether charging takes longer or stops earlier than before.
- Equipment that trips, resets or behaves differently under load.
Build servicing around real use
A service schedule should reflect the vessel, the equipment and the way it is operated. Calendar intervals, running hours, fuel condition and the load profile all matter. A generator that runs lightly and often is not used in the same way as one that runs heavily for shorter periods.
When the generator is part of a wider charging system, it is worth looking at the batteries, chargers and alternator at the same time. A generator problem can sometimes be a symptom of a charging problem elsewhere aboard.
If the vessel has recently changed ownership or the service history is unclear, begin with a baseline check. Record what is there, what condition it is in and what needs attention. That makes later servicing easier to plan.
What to include in an enquiry
For a generator servicing enquiry, include the vessel type and approximate length, the marina or berth location, the generator make and model if known, how often it runs, and anything that has changed. If the service history is known, include when it was last serviced.
You do not need to diagnose the fault before getting in touch. If you are unsure what is mechanical and what is electrical, describe what you have noticed and let the conversation establish the next step.
- Vessel type and approximate length.
- Marina or berth location.
- Generator make and model, if known.
- How often it runs and what it powers.
- Any change in starting, running or charging behaviour.
- When it was last serviced, if known.
Where this fits with maintenance
Generator servicing often sits alongside scheduled maintenance for the rest of the vessel’s electrical system. A visit can cover the generator and the systems connected to it, rather than treating each item in isolation.
If the generator is not the only item that needs attention, include the other work in the enquiry. That gives a better picture of the time and access required and helps avoid a second visit for something that could have been planned together.
A practical next step
If you are not sure when the generator was last checked, start by describing how it is used and what has changed. Maritime Electrical can discuss the service approach and confirm the details before the visit is booked.
The aim is not to create a longer list of jobs for the sake of it. It is to keep the generator reliable for the way you use the boat and to deal with small changes before they become a trip-ending problem.