Product family · Marine generator
Marine generators
The generation half of the marine line: five listed GM ratings for shipboard power, and the specification checks that make a marine quote reliable.
This page collects the marine generation offer in one place. The verified core is the marine power generation table: Cummins GM series engines listed at 47 kW (4BTA3.9-GM47), 55 kW (GM55), 65 kW (GM65), 80 kW (6BT5.9-GM80) and 83 kW (GM83), on 3.9-litre and 5.9-litre displacements at 1,500–1,800 rpm. These are engine ratings for marine generator sets — the machinery that keeps a working vessel's lights, refrigeration, pumps and deck equipment running.
A marine generator enquiry succeeds or fails on the same discipline as a land genset enquiry, plus two marine specifics: frequency (the table spans both 1,500 and 1,800 rpm ratings) and duty profile (a fishing vessel's hotel and refrigeration load runs very differently from a standby set on a cargo vessel). State both in the enquiry, and confirm the exact GM model's rating at your frequency before you order.
Listed range at a glance
| Model / line | Details on record |
|---|---|
| 4BTA3.9-GM47 / GM55 / GM65 | 47 / 55 / 65 kW · 3.9 L · 1,500–1,800 rpm listed |
| 6BT5.9-GM80 / GM83 | 80 / 83 kW · 5.9 L · listed at 1,500 rpm |
| Parent tables | Cummins family tables (B series) and the marine power generation listing |
| Terms on record | Complete units: delivery 15–30 days · warranty 1 year or 1,200 hours |
Specifying against the GM table
Build the load list by circuit: lighting, refrigeration compressors (note starting current), pumps, winches or deck machinery, navigation and accommodation loads. Sum the running load of that hour, and note the largest starting event separately. The GM figures are marine engine ratings, not complete-set electrical outputs, so the load list does not select a model by itself: use it to state the electrical output and starting capability the complete set must deliver, and have the set that meets them confirmed for the exact model in the enquiry, with your duty margin. Describe the load pattern in the enquiry rather than rounding up silently, because an oversized marine genset that runs chronically underloaded is its own maintenance problem.
Then confirm the commercial side for the exact model: scope of supply for the marine variant, delivery window, and the warranty as it applies to the marine model. Listed terms for complete units are delivery 15–30 days and warranty 1 year or 1,200 hours, whichever comes first — have them restated for your model in the quote, and confirm the rating point (speed and frequency) in the same document before you order.
How buyers spec this line
- GM80 and GM83 are listed at 1,500 rpm — confirm 60 Hz figures separately.
- Send a load list, not a single kW guess, for a first-time-right quote.
- Confirm marine-variant scope of supply in writing.
- The sizing method is worked through in the blog guide.
Terms on record
Listed terms on record: complete engines and power units carry a delivery window of 15–30 days and a warranty of 1 year or 1,200 hours, whichever comes first, as published in the supplier's FAQ. Confirm the exact rating, scope of supply and delivery window for your model before you order.
Buyer questions
Engine only, or complete marine genset?
The GM table lists marine generation engines. If you need a complete set with alternator, say so and have the set scope confirmed in the quote.
What if my load is above 83 kW?
Larger marine models are listed in the marine category. Send your load list and target, and confirm the model's listed rating in the enquiry.
How is marine warranty stated?
Listed terms for complete units are 1 year or 1,200 hours, whichever comes first. Confirm the terms for your marine model in the quote.
Related lines
Send the model designation, get a spec-matched quote
Tell us the exact model designation, quantity, destination port and the rating your application needs. Confirm the listed specification, price and delivery window for that model before you place an order.
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