Marine Generators
Shop petrol and diesel marine generators for catamarans and monohulls. Install a reliable Westerbeke marine genset with AHI Marine for years of hassle free cruising.
Westerbeke 3.5 KW (EFI) (3.5MCGA)
The World's SMALLEST, QUIETEST generator is in town. 2500 RPM 2 Cylinder, Naturally Aspirated, Multi Port Electronic Fuel Injected Engine Generator 3.5KW (15 amps). Built to last. LIGHTWEIGHT 102KG Quiet petrol unit - no sound enclosure required. For Westerbeke QLD look no further than AHI Marine. Schedule your call back to ensure you're in the queue.
Dimensions
- 687mm x 402mm x 382mm (LxWxH) 102kg.
Advanced Specifications
Westerbeke 4.2 KW (EFI) (4.2MCGB)
1500 RPM 3 Cylinder, Naturally Aspirated, Mutil Port Fuel Injection Engine Generator 4.2KW (18.2 amps). Built to last. Quiet petrol unit - no sound enclosure required. Optional Venclosure available - for aesthetics, may reduce sound but not designed to do so. Low-CO, Low-Profile, Low-Speed The 4.2 MCGB exemplifies one of the most compact low-CO, low-speed gasoline generators on the market. Westerbeke's unique marine design allows for a high performance generator that is comparable in size to high speed competitors. The lower operating speed of the 4.2 MCGB combined with a heavy-duty industrial base engine contribute to a longer-lasting more reliable product. Multiport EFI and Returnless Fuel System The 4.2 MCGB features sequential multiport electronic fuel injection (MPI). MPI provides optimum fuel efficiency, easy starting, improved reliability and reduced emissions. In conjunction with MPI, electronic speed control maintains the engine at a constant speed (precise frequency regulation) and virtually eliminates "bogging down" when load is applied. A water-cooled returnless fuel system aids in the prevention of vapor lock for improved performance in high ambient temperatures. MPI also features advanced diagnostic capabilities. Smooth and Quiet Operation Featuring a 3-cylinder industrial engine operating at an electronically controlled 1500 rpm, the 4.2 MCGB is extremely smooth and quiet running. In comparison, 3000 rpm engines are generally noisier than their 1500 rpm counterparts and require sound shields to attain similar sound levels.
Dimensions
- Open Frame REARX Exhaust: 672mm x 468mm x 455mm (LxWxH) 174.6kg.
- Open Frame SIDEX Exhaust: 740mm x 468mm x 455mm (LxWxH) 174.6kg.
- In Venclosure: 768mm x 550mm x 477mm (LxWxH) 183.60kg.
Advanced Specifications
Westerbeke 6.2 KW (EFI) (6.2MCGB)
Marine Petrol Generator built in USA (Massachusetts). Overview Engine: 1500 RPM. 0.795 Litre, 3 Cylinder, naturally aspirated. Multi Port EFI Fuel Injection. Governor: Electronic. Battery Charger: 12 amp, integral maintenance charger. Generator: 6.2KW (18.2 amps) at 230V / 50HZ*. Single Phase Only. *Field convertible to 1800 RPM, 7.5 KW Generator. Voltage Regulation - Capacitor.
Dimensions
- Standard REARX Exhaust: 672mm x 468mm x 459mm (LxWxH) 174.6kg.
- Optional SIDEX Exhaust: 740mm x 468mm x 455mm (LxWxH) 174.6kg.
- Optional 'Venclosure'*: 768mm x 550mm x 477mm (LxWxH). Adds 9kg.
*The Venclosure is only available on factory installation, not available separately for retrofit. The Venclosure has no sound insulation or dampening. It is not designed to protect the unit from water.
Advanced Specifications
Westerbeke 7.6 KW (EFI) (7.6MCGB)
1500 RPM 4 Cylinder, Naturally Aspirated, Mutil Port Fuel Injection Engine Generator 7.6KW (33.0 amps) MCGB. Built to last. Quiet petrol unit - no sound enclosure required. Optional Venclosure available - for aesthetics, may reduce sound but not designed to do so.
Dimensions
- Open Frame (standard sidex exhaust): 861mm x 469mm x 459mm (LxWxH) 152.4kg.
- Open Frame (optional rearx exhaust): 799mm x 469mm x 459mm (LxWxH) 152.4kg.
- Venclosure: 863mm x 573mm x 494mm (LxWxH) Add 14kg.
Advanced Specifications
What is a marine generator?
A marine generator is a generator specifically designed to produce electricity aboard boats and yachts, such as Fontaine Pajot and Leopard catamarans, as well as monohull sailing yachts and motor yachts. It typically uses a diesel engine to drive an electrical alternator, supplying power to air-conditioning, refrigeration, lighting, watermakers, cooking equipment, battery chargers and other onboard systems.
How is a marine generator different?
- Corrosion resistance: Marine generators are designed to withstand saltwater, humidity and corrosive marine environments, using appropriate materials, coatings and protective components.
- Cooling system: Many marine generators use a seawater heat exchanger to remove engine heat, rather than relying solely on a conventional land-based radiator and airflow.
- Compact installation: They are engineered to fit within confined engine rooms or dedicated compartments, with consideration for ventilation, exhaust routing and maintenance access.
- Noise and vibration: Yacht generators often incorporate sound-insulated enclosures, vibration-isolating mounts and exhaust silencing to minimise noise transmitted into cabins and living spaces.
- Marine safety: Their design must account for fuel systems, electrical protection, exhaust gases, fire risks and the possibility of water ingress. Applicable marine standards and certification depend on the vessel and market.
- Continuous operation: Marine generators are selected for reliable operation under sustained electrical loads and changing vessel conditions, including heat, humidity, vibration and vessel movement.
How does it compare with other generators?
A land-based generator is generally designed for stationary operation, with cooling, enclosure and environmental protection suited to its installation.
A portable generator prioritises portability, affordability and temporary power, often using an air-cooled engine and an open or lightly enclosed frame.
A marine generator prioritises safe, reliable power in a confined, moving, saltwater environment, with particular emphasis on corrosion protection, cooling, noise control and integration with the vessel's electrical system.
How to choose marine generator size
For premium cruising catamarans and monohull sailing yachts such as Fountaine Pajot and Leopard Catamarans, focus is on marine generator manufacturers with a strong reputation for reliability, low noise and vibration, compact installation, and Australia marine generator servicing.
The best choice depends on whether you're equipping a production cruising catamaran, a luxury monohull, or a high-end yacht with substantial air-conditioning, watermaker, induction cooking and battery-charging loads. To discuss boat electrical load requirements schedule a call back today to discuss your engineering requirements with AHI Marine.
What matters when choosing a generator for a catamaran?
Catamarans have a few particular considerations compared with monohulls:Unordered list
- Noise transmission: Generator vibration can travel through a hull and bulkheads into cabins. Sound insulation and proper isolation mounts are important.
- Installation space: Generator access, ventilation, cooling-water routing and servicing clearance can be just as important as the generator's physical dimensions.
- Electrical demand: Air-conditioning, watermakers, induction cooktops, refrigeration and battery charging can drive the required output considerably higher.
- Battery integration: A suitably designed inverter and lithium-battery system may allow you to run quieter loads from batteries instead of operating the generator continuously.
- Local marine generator servicing: For a yacht operating in Australia or the South Pacific, nearby technicians and spare-parts availability should carry significant weight.
Scheduling your call back is easy.
- Describe the marine engineering issues you're facing.
- Include preferred time and date and vessel LOA.
- Click Schedule Call Back
Marine generators price depends on size of vessel and new or refurbished.
Prices in Australia range from A$5,000 to A$30,000+
For small boats choose lower KVa and match the generator output to your vessels demand.
AHI Marine supplies marine generators for catamarans and monohulls in 40ft - 80ft range. Get expert advice today
Not at all.
First and foremost we're here to help. AHI Marine will contact you at your preferred time to understand your marine engineering requirements
We will provide expert advice and see if the issues you face are the right fit for AHI Marine.
AHI Marine specialises in marine mechanical and engineering maintenance of large catamarans and monohulls between 40ft - 80ft LOA such as Fontaine Pajot and Leopard.
AHI Marine is proud to be an official distributor of Westerbeke Generators.
Yes. AHI Marine sells used marine generators and gensets, meticulously refurbished by our expert engineers.
Simply schedule a call back.
- Enter refurbished Westerbeke product you are after.
- AHI Marine will call back to discuss pricing and after sales services.
List of popular boat generator brands
- Westerbeke
- Volvo
- Cummins
- Kohler
- Mase
- Nanni
Everything you need to know about next steps with AHI Marine.
Why AHI Marine?
AHI Marine not only brings you the latest in reliable marine power solutions but also offers years of expertise in marine installation and repair services.
Our team is dedicated to providing exceptional customer service and ensuring that your Westerbeke marine generator needs are met with the highest standards of quality and professionalism.
AHI Marine has been servicing, installing and repairing refurbished Westerbeke generators for many years on Australia's Gold Coast.
We are perfectly situated in the busy marine area of Coomera operating from The Boatworks and Gold Coast City Marina with access to all the services required to safely lift and stand your vessel for servicing.