7.6 MCGB-514 Westerbeke 7.6 kW Multiport EFI – 50 Hz – 1500 RPM

Description

New Westerbeke 7.6 MCGB-514 7.6 kW Multiport EFI Marine Generator For Sale

Compact 50 Hz Marine Power with Low-Speed Multiport EFI Performance

The Westerbeke 7.6 MCGB 7.6 kW Multiport EFI Marine Generator is a compact, electronically governed generator developed for gasoline-powered motor yachts, sport cruisers, houseboats, passenger vessels, and other compatible marine applications.

Delivering 7.6 kW at 230V, 50 Hz and 1500 RPM, the Westerbeke 7.6 MCGB 7.6-514 combines a smooth four-cylinder industrial engine with sequential multiport electronic fuel injection, a water-cooled returnless fuel system, electronic speed control, freshwater cooling, a brushless four-pole alternator, remote starting, and automatic safety protection.

The standard single-phase configuration produces 33 amps at 230V and operates at a power factor of 1.0. Westerbeke currently lists the 7.6 MCGB 7.6 among its production Multiport EFI marine gasoline generators.

Its output may support compatible onboard systems such as:

• Battery chargers and inverter-chargers
• Refrigerators and freezers
• Freshwater and seawater pumps
• Navigation and communication systems
• Cabin and deck lighting
• Entertainment systems
• Electrical outlets
• Galley appliances
• Appropriately sized marine air-conditioning systems
• Other compatible hotel and auxiliary loads

Actual suitability depends on the vessel’s continuous electrical demand, compressor and motor-starting current, simultaneous appliance use, and required operating reserve.

A Marine Gasoline Generator, Not a Diesel Generator

The Westerbeke 7.6 MCGB 7.6-514 is a gasoline or petrol generator. It is not designed to operate on diesel fuel.

Its Multiport EFI system electronically controls gasoline delivery, while its water-cooled returnless fuel arrangement helps maintain reliable fuel flow in hot machinery spaces. The generator should only be installed aboard a vessel with a compliant marine gasoline fuel system, ignition-protected components, correctly engineered ventilation, and a suitable wet-exhaust system.

Correctly identifying the generator’s fuel type is essential when planning:

• Fuel-tank compatibility
• Fuel-hose specifications
• Fuel filtration
• Machinery-space ventilation
• Ignition-protected electrical components
• Fire and explosion protection
• Exhaust routing
• Carbon-monoxide detection
• Installation-code compliance

Installation and maintenance should be carried out by qualified marine technicians familiar with gasoline fuel systems and applicable marine safety standards.

Low-Profile, Low-Speed Westerbeke Engineering

The 7.6 MCGB 7.6 Multiport EFI generator is designed to provide substantial electrical output without using the 3000 RPM speed found on many compact 50 Hz generators.

Its electronically controlled 1500 RPM operating speed is intended to provide smoother and quieter performance while reducing mechanical operating frequency. The low-profile design allows the generator to deliver 7.6 kW from a package measuring approximately 31.5 inches long, 18.5 inches wide and 18.1 inches high.

Principal marine features include:

• Four-cylinder industrial gasoline engine
• Sequential Multiport EFI
• Water-cooled returnless fuel system
• Electronic engine governing
• Low-CO exhaust technology
• Freshwater cooling with heat exchanger
• Freshwater-cooled exhaust manifold
• Water-injected exhaust elbow
• Belt-driven raw-water pump
• Brushless four-pole alternator
• One-touch start-and-stop control
• Remote-control capability
• Automatic safety warnings and shutdowns
• AC output circuit breaker
• Vibration isolators
• Remote lubricating-oil filter
• Optional ventilated enclosure

These characteristics make the generator suitable for compatible new builds, yacht refits, and marine generator replacement projects.

Smooth Four-Cylinder Gasoline Engine

The Westerbeke 7.6 MCGB 7.6 uses a naturally aspirated, four-cylinder, four-stroke gasoline engine with a displacement of 64.1 cubic inches or approximately 1.051 litres.

In the 50 Hz configuration, the engine operates at 1500 RPM and produces approximately 13.4 hp. Its construction includes an aluminium cylinder head, cast-iron cylinder block, forged crankshaft supported by four main bearings, overhead rotating valves, and a semi-spherical combustion chamber.

Engine specification	Published value
Number of cylinders	4
Cylinder arrangement	Vertical inline
Engine cycle	Four stroke
Fuel type	Gasoline/petrol
Aspiration	Naturally aspirated
Displacement	64.1 cu. in. / 1.051 L
Bore × stroke	2.58 × 3.07 in.
Compression ratio	9.0:1
Output at 1500 RPM	Approximately 13.4 hp
Rated operating speed	1500 RPM
Combustion system	Semi-spherical
Fuel system	Sequential Multiport EFI
Governor	Electronic
Electrical system	12V DC, negative ground

The four-cylinder arrangement provides smoother power delivery than many compact twin- or three-cylinder generator platforms. Combined with low-speed operation and electronic governing, it helps minimise noticeable vibration and engine-speed fluctuation when electrical loads change.

7.6 kW Electrical Output at 50 Hz

The Westerbeke 7.6 MCGB 7.6-514 produces 7.6 kW of single-phase electrical power at 50 Hz.

Electrical specification	Rating
Generator model	7.6 MCGB-514
Rated output	7.6 kW
Voltage	230V
Rated current	33.0 amps
Frequency	50 Hz
Phase	Single phase
Number of wires	Four
Power factor	1.0
Operating speed	1500 RPM
Starting arrangement	Remote

These electrical ratings are taken from Westerbeke’s February 2026 advanced specification sheet.

The 230V, 50 Hz arrangement is suitable for compatible European, British, Australian, African, Asian, and international marine electrical systems. Vessel voltage, grounding, neutral configuration, shore-power switching, and appliance compatibility should be confirmed before installation.

A professional marine electrical load assessment should consider:

• Total continuous electrical demand
• Air-conditioning compressor startup
• Refrigeration compressor startup
• Pump and electric-motor starting current
• Battery-charger demand
• Simultaneous appliance use
• Generator operating reserve
• Potential future electrical additions

Electric motors and compressors may draw several times their running current during startup. The Westerbeke operator’s manual notes that certain motor types may require approximately two to seven times their normal running current to start, depending on the motor and connected mechanical load.

Field-Convertible 50 and 60 Hz Generator Platform

The 7.6 MCGB 7.6 shares its engine and generator platform with the 9.5 MCGB 60 Hz model.

The two published configurations are:

Configuration	Output	Voltage	Frequency	Speed
7.6 MCGB-514	7.6 kW	230V	50 Hz	1500 RPM
9.5 MCGB-614	9.5 kW	120/240V	60 Hz	1800 RPM

Westerbeke describes the platform as field-convertible between 50 and 60 Hz. Conversion should only be performed using approved Westerbeke procedures because it affects engine speed, electrical output, voltage connections, circuit protection, control settings, and the compatibility of connected vessel systems.

Sequential Multiport Electronic Fuel Injection

A major feature of the 7.6 MCGB 7.6 is its sequential Multiport Electronic Fuel Injection, commonly abbreviated as Multiport EFI or MPI.

Rather than relying on a traditional carburettor, the system electronically meters and delivers gasoline to the engine’s intake ports. Westerbeke identifies the benefits as easier starting, improved fuel efficiency, dependable performance, reduced normal emissions, and advanced diagnostic capability.

Potential advantages include:

• Easier cold and warm starting
• More precise fuel delivery
• Consistent air-to-fuel control
• Improved response to changing loads
• Reduced fuel-related hesitation
• Better operation in changing ambient conditions
• Electronic fault diagnostics
• Reduced normal exhaust emissions

The Multiport EFI system works with electronic governing to help prevent the engine from bogging down when a substantial electrical load is connected.

Westerbeke also provides EC-11 diagnostic software for qualified technicians working on compatible EFI generator models.

Water-Cooled Returnless Fuel System

Gasoline can vaporise when exposed to high machinery-space temperatures. This may interfere with fuel delivery and contribute to vapor lock, difficult starting, or unstable operation.

The Westerbeke 7.6 MCGB 7.6 uses a water-cooled returnless fuel system designed to control fuel temperature and improve performance in demanding ambient conditions.

A correctly installed marine gasoline fuel system should include:

• Approved gasoline-resistant marine fuel hose
• Correctly sized fuel-supply piping
• An accessible fuel shutoff valve
• A suitable gasoline water-separating filter
• Secure and leak-free connections
• Proper grounding and bonding
• Ignition-protected electrical components
• Adequate machinery-space ventilation
• Routine checks for leakage and deterioration

The generator’s published fuel-supply connection is approximately ¼-inch internal diameter or 6.35 mm.

Westerbeke specifies clean, filtered unleaded gasoline with an octane rating of at least 89 and a maximum ethanol content of 10%. Gasoline containing more than 10% ethanol is not approved and may affect warranty coverage.

Westerbeke Low-CO Technology

The Westerbeke 7.6 MCGB 7.6 is described as a Low-CO marine gasoline generator.

Its electronically controlled fuel system maintains a precise air-to-fuel ratio, while exhaust after-treatment through a specialised catalyst helps reduce normal carbon-monoxide emissions. Westerbeke stresses that emission levels can vary with generator load and the condition of the fuel, air, control, sensor, and catalyst systems.

Low-CO does not mean zero carbon monoxide. Carbon monoxide remains colourless, odourless, poisonous, and potentially fatal.

Every installation should include:

• Functioning marine carbon-monoxide detectors
• Correct detector placement
• Adequate machinery-space ventilation
• A leak-free exhaust system
• Correct exhaust-outlet positioning
• Routine catalyst inspection
• Regular fuel- and air-system maintenance
• Periodic CO testing with an appropriate analyser

Westerbeke instructs operators not to run the generator unless the vessel has a functioning marine CO detector and warns that untreated exhaust leaks are extremely dangerous.

Catalyst and Exhaust-System Maintenance

The catalyst is critical to the Low-CO system. Water intrusion into the exhaust may damage the catalyst and significantly reduce its ability to control emissions.

Westerbeke’s January 2026 operator’s manual requires catalyst inspection at prescribed intervals and states that exhaust CO levels should be verified seasonally or every 250 operating hours, whichever occurs first. The catalyst should be inspected and replaced if necessary every 500 operating hours. 7.6 MCGB 7.6

The exhaust system should be inspected for:

• Water intrusion
• Exhaust leakage
• Catalyst deterioration
• Corrosion of the water-injected elbow
• Loose clamps
• Damaged exhaust hose
• Incorrect siphon protection
• Excessive exhaust back pressure

A damaged catalyst, leaking exhaust joint, or faulty CO detector should be corrected before the generator is returned to operation.

Electronic Governing for Stable Frequency

The 7.6 MCGB 7.6 uses an electronic engine governor to maintain the correct 1500 RPM speed as connected electrical demand changes.

When a compressor, pump, charger, or other motor-driven load starts, the engine experiences an immediate increase in mechanical demand. The governor adjusts engine operation to minimise speed loss and maintain stable 50 Hz frequency.

Westerbeke publishes frequency regulation of approximately 0.5 Hz, or 1%, from no load to full load.

Stable frequency supports the operation of compatible:

• Marine air-conditioning systems
• Refrigeration compressors
• Battery chargers
• Electric pumps
• Navigation electronics
• Communication systems
• Lighting circuits
• Monitoring equipment
• Entertainment systems

Electronic governing improves load response, but it cannot compensate for an undersized or continuously overloaded generator.

Brushless Four-Pole Alternator

The Westerbeke 7.6 MCGB 7.6 uses a brushless, four-pole revolving-field alternator.

Its published alternator characteristics include:

• Brushless construction
• Four-pole design
• Revolving electrical field
• Class H winding insulation
• Direct-connected centrifugal cooling blower
• Approximately ±5% voltage regulation
• Approximately 0.5 Hz frequency regulation
• Controlled temperature rise within the stated NEMA standard

The four-pole design enables the generator to produce 50 Hz electricity at 1500 RPM. Brushless construction also reduces routine maintenance associated with carbon brushes.

Westerbeke states that the generator’s electromagnetic-interference performance exceeds the requirements of most marine radio telephones and standard televisions. Correct grounding, cable routing, circuit protection, and electrical installation remain essential.

Freshwater Cooling with Marine Heat Exchanger

The 7.6 MCGB 7.6 uses a freshwater cooling system with a marine heat exchanger.

Engine coolant circulates through the cylinder block, aluminium cylinder head, and freshwater-cooled cast-aluminium exhaust manifold. Raw water drawn from outside the vessel removes heat through the exchanger before being discharged through the water-injected exhaust.

The cooling arrangement includes:

• Closed freshwater coolant circuit
• Marine heat exchanger
• Coolant-recovery tank
• Freshwater-cooled exhaust manifold
• Belt-driven raw-water pump
• Water-injected exhaust elbow
• ¾-inch raw-water connection

The published cooling-system capacity is approximately 4.75 US quarts or 4.5 litres.

Routine maintenance should include inspection of:

• Coolant level and condition
• Raw-water intake and seacock
• Seawater strainer
• Raw-water pump and impeller
• Pump drive belt
• Heat-exchanger passages
• Cooling hoses and clamps
• Zinc anode
• Exhaust-injection elbow
• Siphon break
• Wet-exhaust hose and muffler

Restricted raw-water flow may cause high exhaust or coolant temperature and trigger a protective shutdown.

Approximate Fuel Consumption

Westerbeke publishes the following approximate gasoline-consumption figures for the 7.6 MCGB operating at 1500 RPM:

Generator load	Approximate fuel consumption
100% load	1.00 US gal/hr / 3.76 L/hr
75% load	0.84 US gal/hr / 3.18 L/hr
50% load	0.66 US gal/hr / 2.48 L/hr
25% load	0.48 US gal/hr / 1.81 L/hr

Actual fuel consumption may vary according to electrical demand, engine condition, gasoline quality, ambient temperature, ventilation, installation, and maintenance.

One-Touch Control and Remote Starting

The 7.6 MCGB 7.6 includes a simple one-touch start-and-stop control panel with a running-hour meter and warning-annunciation lights.

Remote operation is supported through an optional start-and-stop panel and extension harness, allowing the generator to be controlled from a helm, saloon, electrical panel, or another suitable location aboard the vessel.

The control arrangement includes:

• Local start-and-stop control
• Running-hour meter
• Warning-annunciation display
• AC output circuit breaker
• Electronic engine-control system
• Automatic protective shutdowns
• Optional remote-panel connection

Automatic Safety Warnings and Shutdowns

The generator monitors potentially damaging operating conditions and can shut down automatically when a serious fault is detected.

Published protection includes:

• Engine overspeed
• Engine underspeed
• Low lubricating-oil pressure
• High exhaust temperature
• High engine-coolant temperature
• Additional monitored operating faults

These systems help protect the engine and alternator but do not replace routine inspection of oil, coolant, raw-water flow, fuel connections, exhaust components, ventilation, wiring, and carbon-monoxide detectors.

Starting System and Battery Charging

The 7.6 MCGB 7.6 uses a 12V, 1.4 kW electric starting motor and has a published minimum cranking requirement of approximately 120 amps at 70°F.

Westerbeke’s current product page lists a 10-amp battery charger, while the February 2026 advanced specification sheet lists an integral 12-amp battery charger. The exact charging-system rating should therefore be confirmed for the generator’s production date and serial number before quotation or installation.

The starting battery should be:

• Correctly sized
• Properly secured
• Connected with marine-grade cables
• Protected by appropriate switches and circuit protection
• Regularly inspected for charge and corrosion
• Dedicated to the generator where required

Smooth and Quiet 1500 RPM Operation

The Westerbeke 7.6 MCGB 7.6 combines several features intended to reduce operating noise and vibration:

• Low-speed 1500 RPM operation
• Smooth four-cylinder engine
• Electronic governing
• Flexible vibration isolators
• Freshwater-cooled exhaust manifold
• Water-injected exhaust system
• Heavy-duty industrial engine construction

Westerbeke describes the four-cylinder 1500 RPM platform as exceptionally smooth and quiet compared with many 3000 RPM gasoline generators, which may require additional sound shielding to achieve similar onboard noise levels.

Final onboard sound levels also depend on:

• Generator foundation
• Machinery-space insulation
• Ventilation openings
• Exhaust-muffler selection
• Exhaust-hose routing
• Flexible connections
• Structural vibration transmission
• Optional enclosure selection

Optional Westerbeke Ventilated Enclosure

The 7.6 MCGB is available with an optional Westerbeke ventilated enclosure, commonly referred to as the Venclosure.

Enclosure measurement	Specification
Length	34.0 in. / 863 mm
Width	22.6 in. / 573 mm
Height	19.5 in. / 494 mm
Approximate weight	30 lb. / 14 kg

Westerbeke states that the enclosure is not sold separately, so it should normally be specified with the original generator order.

The enclosure provides a finished protective installation while maintaining generator airflow. It does not replace correctly engineered machinery-space ventilation or ignition-protected blower arrangements.

Dimensions, Weight and Installation Planning

The Westerbeke 7.6 MCGB has the following published base-generator dimensions:

Measurement	Specification
Length	31.50 in. / approximately 800 mm
Width	18.50 in. / approximately 470 mm
Height	18.10 in. / approximately 460 mm
Dry weight	445 lb. / 201.9 kg
Raw-water connection	¾ in. / 19.1 mm
Exhaust connection	2 in. / 50.8 mm
Fuel-supply connection	¼ in. ID / 6.35 mm
Lubricating-oil capacity	4.1 US qt / 3.9 L
Cooling-system capacity	4.75 US qt / 4.5 L
Maximum operating angle	25° in all directions

The manufacturer notes that general drawings are for reference and should not be used as final installation drawings. The approved model-specific drawing should be used when fabricating foundations and planning hose, wiring, and exhaust connections.

Before installation, confirm:

• Machinery-space dimensions
• Mounting-hole positions
• Lifting and removal route
• Routine service access
• Fuel-system compatibility
• Ignition-protected ventilation
• Raw-water intake arrangement
• Siphon-break requirements
• Wet-exhaust routing
• Starting-battery cable size
• AC output cable size
• Grounding and bonding
• Shore-power transfer switching
• Carbon-monoxide detector placement
• Optional enclosure clearance

Applications of the Westerbeke 7.6 MCGB 7.6-514

Gasoline-Powered Motor Yachts

The generator is particularly suitable for compatible vessels whose propulsion engines and fuel-storage systems already use gasoline.

Sport Cruisers

Its 1500 RPM operation and compact height make it suitable for cruisers requiring dependable electricity for refrigeration, battery charging, pumps, lighting, electronics, and comfort systems.

Houseboats and Liveaboard Vessels

The 7.6 MCGB 7.6 may support compatible refrigerators, freshwater systems, battery banks, lighting, electrical outlets, entertainment systems, and selected domestic appliances.

Passenger and Hospitality Craft

It may provide auxiliary electricity for lighting, refrigeration, communication systems, pumps, galley appliances, and passenger-service loads.

Marine Generator Replacement

The 7.6 MCGB 7.6 may replace an existing gasoline generator where the voltage, frequency, output, fuel system, dimensions, weight, ventilation, cooling, exhaust, controls, and vessel wiring are compatible.

Complete Technical Specifications

Specification	Details
Manufacturer	Westerbeke
Model	7.6 MCGB-514
Generator type	Multiport EFI Marine Gasoline Generator
Rated output	7.6 kW
Voltage	230V
Frequency	50 Hz
Phase	Single phase
Rated current	33.0 amps
Number of wires	Four
Power factor	1.0
Operating speed	1500 RPM
Engine cylinders	Four
Engine configuration	Vertical inline
Engine cycle	Four stroke
Aspiration	Naturally aspirated
Displacement	64.1 cu. in. / 1.051 L
Bore × stroke	2.58 × 3.07 in.
Compression ratio	9.0:1
Engine output	Approximately 13.4 hp at 1500 RPM
Fuel system	Sequential Multiport EFI
Fuel cooling	Water-cooled returnless system
Low-CO system	Electronic air/fuel control with catalyst
Governor	Electronic
Alternator	Brushless, four pole
Voltage regulation	Approximately ±5%
Frequency regulation	Approximately 0.5 Hz
Cooling system	Freshwater with heat exchanger
Exhaust manifold	Cast aluminium, freshwater cooled
Raw-water pump	Belt driven
Starting system	12V, 1.4 kW electric
Raw-water connection	¾ inch
Exhaust connection	2 inches
Lubricant capacity	4.1 qt / 3.9 L
Cooling capacity	4.75 qt / 4.5 L
Dimensions	31.5 × 18.5 × 18.1 in.
Dry weight	445 lb. / 201.9 kg
Maximum operating angle	25° in all directions
Optional enclosure	Westerbeke Venclosure
Production status	Current production

These specifications are based on Westerbeke’s current model page and February 2026 advanced specification sheet. Final configuration should be confirmed against the serial-number-specific documentation before installation.

Standard Equipment

Typical standard equipment includes:

• Four-cylinder gasoline engine
• Sequential Multiport EFI
• Water-cooled returnless fuel system
• Low-CO exhaust catalyst system
• Electronic engine governor
• One-touch start-and-stop panel
• Running-hour meter
• Warning-annunciation lights
• Automatic safety shutdowns
• Freshwater cooling
• Coolant-recovery tank
• Freshwater-cooled exhaust manifold
• AC circuit breaker
• Starting-battery charger
• Water-injected exhaust elbow
• Belt-driven raw-water pump
• Flexible vibration isolators
• Remote lubricating-oil filter
• Lubricating-oil drain hose
• Belt guard
• Operator’s manual
• Parts documentation

Westerbeke states that the model meets applicable US Coast Guard requirements, CARB and US EPA regulations, and is CE certified. The generator is also advertised with a five-year limited warranty, subject to Westerbeke’s registration, installation, application, commissioning, and warranty conditions.

Optional Equipment

Available options may include:

• Remote start-and-stop panel
• Extension wiring harness
• Ventilated enclosure
• SIDEX water-injected exhaust elbow
• Hydro-Hush muffler and fittings
• Anti-siphon valve with stainless-steel loop
• Ship-to-shore transfer switch
• Auxiliary DC power adapter
• Onboard spare-parts kit
• Extended-cruising spare-parts kit

Accessory availability and final package contents should be confirmed when requesting a quotation.

Frequently Asked Questions

Is the Westerbeke 7.6 MCGB 7.6 a diesel generator?

No. It is a gasoline or petrol marine generator equipped with sequential Multiport EFI.

How much power does the 7.6 MCGB 7.6-514 produce?

It produces 7.6 kW at 230V, 50 Hz and 1500 RPM, with a rated current of 33 amps.

Is the generator single phase?

Yes. The 7.6 MCGB 7.6-514 is rated as a four-wire, 230V, single-phase generator.

How many cylinders does the engine have?

The generator uses a naturally aspirated four-cylinder engine with approximately 1.051 litres of displacement.

Does it use electronic fuel injection?

Yes. Sequential Multiport EFI provides electronically controlled fuel delivery, easy starting, reliable load response, and diagnostic capability.

Is it electronically governed?

Yes. Electronic governing maintains the 1500 RPM operating speed and helps stabilise 50 Hz frequency as electrical demand changes.

Is the engine freshwater cooled?

Yes. It uses freshwater cooling with a marine heat exchanger and a freshwater-cooled cast-aluminium exhaust manifold.

What does Low-CO mean?

Low-CO means the generator uses precise electronic fuel control and exhaust after-treatment to reduce normal carbon-monoxide emissions. It does not eliminate CO or make the exhaust safe to breathe.

Is a carbon-monoxide detector required?

A functioning marine CO detector is essential. Westerbeke instructs operators not to run the generator without an approved operating detector aboard the vessel.

Is a ventilated enclosure available?

Yes. An optional Westerbeke Venclosure is available but is not sold separately from the generator package.

Can the generator replace an older marine genset?

Potentially. Compatibility must be confirmed for fuel type, voltage, frequency, output, dimensions, weight, ventilation, exhaust, cooling, controls, and vessel wiring.

Request a Quote for the Westerbeke 7.6 MCGB-514

The New Westerbeke 7.6 MCGB 7.6 kW Multiport EFI Marine Generator combines low-speed 1500 RPM operation, smooth four-cylinder performance, electronic governing, sequential fuel injection, a water-cooled returnless fuel system, freshwater cooling, a brushless four-pole alternator, remote operation, and Low-CO marine technology.

It is a dependable choice for compatible gasoline-powered yachts and marine vessels requiring 230V, 50 Hz auxiliary electricity.

Contact our marine generator specialists to request the latest Westerbeke 7.6 MCGB 7.6-514 price, confirm availability, select the appropriate accessories, and review compatibility with your vessel’s fuel, electrical, ventilation, cooling, and exhaust systems.