300KW Cummins Marine Generator 400KW 500KW

Over 9000 Global Service Locations
Cummins maintains a massive network of more than 9,000 authorized service outlets across the globe, forming one of the most comprehensive dealer systems in the marine power industry. The marine diesel generator can gain timely professional support no matter which sea area or port the vessel arrives at. This reliable marine generator gets full lifecycle protection from the worldwide service layout of Cummins. Ship owners and operators never need to worry about after-sales issues during transoceanic voyages. The widespread service network ensures quick parts supply, on-site maintenance and technical guidance, delivering solid operational guarantee for long-distance global navigation.

Five-year / 2000-hour Warranty Coverage
The Onan marine series of Cummins launches an industry-leading warranty policy with five-year validity or 2000 operating hours, whichever comes first. This premium guarantee fully reflects the outstanding quality and confidence in the marine diesel generator. Using this durable marine generator, users can greatly reduce extra maintenance costs and operational risks in the early and middle service period. Backed by the favorable warranty terms from Cummins, ship operators can run the equipment with greater peace of mind. It serves as a cost-effective and reassuring choice for various medium and large vessels pursuing long-term stable operation.

24000-hour Warranty for X15 in Continuous Operation
For the X15 power unit running under continuous operation mode, Cummins offers a special warranty plan covering up to 24,000 operating hours, along with 24-month unlimited-hour protection. This long-cycle warranty is tailored for the marine diesel generator that works nonstop on large ships. Such generous after-sales terms fully prove the exceptional durability of this heavy-duty marine generator. Built with robust core components and exquisite craftsmanship, it adapts to round-the-clock working conditions at sea. The exclusive warranty policy from Cummins effectively cuts long-term operational expenditures and brings tremendous value to users.

User-friendly Digital Display & Diagnostic System
Equipped with dedicated Onan digital display screen, the Cummins marine diesel generator can clearly present full data of the engine and alternator in real time. This intuitive interface simplifies daily inspection and on-water troubleshooting significantly. Operators can quickly check running parameters and pinpoint potential faults without complex professional tools. This humanized marine generator lowers the difficulty of routine management aboard vessels. With the smart diagnostic function developed by Cummins, abnormal conditions can be handled in a timely manner, ensuring the whole power system stays stable and supporting safe sailing of all types of marine crafts.

FAQ Section

1. Q: What is the reason for the speed fluctuation when Cummins marine generator is running? How to deal with it?

A: According to actual case analysis, the common cause of small-range fluctuations in rotational speed (such as 50r/min) is that the temperature of the PT fuel system is too high, which leads to thermal expansion of the actuator coupling and a reduction in swing clearance. Processing method:

Install a fuel cooler: Install a cooler on the oil return pipe to reduce the temperature of the fuel entering and exiting the PT pump

Increase the capacity of the float tank: increase the mixing of new return oil and improve heat dissipation

Modify the oil tank layout: cancel the float tank and connect the oil return pipe directly to the daily oil tank
Taking these measures can reduce the oil temperature from 40°C to about 25°C and eliminate speed fluctuations.

2. Q: What protective shutdown functions does Cummins marine generator set have?

A: Cummins marine generator sets are equipped with multiple protection shutdown functions. When a fault occurs, the control switch indicator light will flash in different flash groups:

1 flash: The engine water temperature is too high and the engine shuts down.

2 flashes: The engine oil pressure is too low and the engine shuts down.

3 flashes: service failure (need to read fault code)

4 flashes: startup timeout failed and shutdown

5 flashes: Carbon monoxide (CO) concentration is too high and the machine shuts down.

7 flashes: shutdown due to loss of seawater flow (affecting engine and exhaust cooling)
Units with digital display screens can directly display fault codes and fault descriptions.

3. Q: What should I do if there is no AC output when the generator is running?

A: If the engine is working normally but the generator has no output voltage, follow the following steps to troubleshoot:

Check the generator circuit breaker: if it is tripped or closed

Check AVR (automatic voltage regulator): manual voltage selector switch is in the "auto" position

Check the entire AC power supply system: Are other circuit breakers tripped?

Check the connection lines: whether the generator output is connected normally
If there is still no output, a professional may need to check the excitation system and rotating rectifier.

4. Q: How to store and maintain Cummins marine generators in winter or during long-term shutdown?

A: Please pay attention to the following when sailing is suspended in winter or for a long time:

Antifreeze protection: If there is a danger of freezing on the seawater side of the heat exchanger, the water in the seawater pipe should be drained (freshwater antifreeze has protected it)

Battery maintenance: Disconnect the negative battery cable and recharge regularly

Ethylene glycol warning: Ethylene glycol is toxic. Antifreeze must not be discharged into the environment and cannot be used to protect the seawater side.

Regular operation: It is recommended to run once a month to keep the system lubricated

Fuel System: Keep the fuel tank full and add fuel stabilizer