3.5 MCGB-512 – Westerbeke 3.5 kW, 50 Hz Multiport EFI

Description

New Westerbeke 3.5 MCGB-512 3.5 kW 50 Hz Multiport EFI Marine Gasoline Generator For Sale

Compact Marine Power for Small Yachts and Recreational Vessels

The New 3.5 MCGB-512 3.5 kW 50 Hz Multiport EFI Marine Gasoline Generator is a compact, lightweight marine gasoline generator set engineered to provide dependable onboard electricity for small motor yachts, express cruisers, sport-fishing boats, cabin cruisers, day boats, and other gasoline-powered recreational vessels.

Designed for compatible 230V, 50 Hz marine electrical systems, the Westerbeke 3.5 MCGB-512 3.5 delivers 3.5 kW of single-phase electrical power. Its two-cylinder gasoline engine operates at an electronically controlled 2500 RPM, while sequential multiport electronic fuel injection, a water-cooled returnless fuel system, freshwater cooling, automatic safety shutdowns, one-touch controls, and advanced diagnostic capability support dependable onboard operation.

The standard 50 Hz configuration supplies 230V AC power at approximately 15 amps, using a single-phase, two-wire arrangement with a power factor of 1.0. The MCGB-512 is manufactured specifically for 50 Hz operation and is not field-convertible to 60 Hz.

Its 3.5 kW capacity may support a compatible marine air-conditioning unit, battery charger, refrigerator, water heater, lighting, entertainment equipment, freshwater pumps, electrical outlets, and other moderate onboard loads, subject to a proper electrical-load assessment.

Customers looking for the Westerbeke 3.5 MCGB-512 for sale should confirm the vessel’s voltage and frequency, expected electrical demand, machinery-space dimensions, raw-water supply, exhaust arrangement, fuel-system compatibility, control-panel requirements, and installation accessories before ordering.

Purpose-Built Westerbeke Marine Generator Engineering

The Westerbeke 3.5 MCGB generator range is developed specifically for onboard marine power generation. Unlike portable household generators or general-purpose industrial units adapted for vessel use, the MCGB integrates marine cooling, water-injected exhaust compatibility, gasoline ignition protection, electronic fuel management, automatic safety systems, vibration isolation, and vessel-compatible controls.

The generator is engineered for operating conditions that may include:

• Continuous vessel vibration
• High machinery-space humidity
• Salt-laden marine air
• Restricted installation space
• Changing electrical demand
• Elevated engine-room temperatures
• Vessel movement and inclination
• Extended operation away from shore power

Westerbeke identifies the 3.5 MCGB-512 3.5 as its most compact and lightweight 3.5 kW multiport EFI marine generator. The unit weighs approximately 226 lb. or 102 kg and is intended for smaller vessels requiring useful AC power without installing a substantially larger generator package.

The generator meets applicable United States Coast Guard requirements, CARB and United States EPA requirements, and is identified by Westerbeke as CE-certified.

Customers comparing the Westerbeke 3.5 MCGB price should consider more than its 3.5 kW rating. Compact size, low weight, multiport EFI, electronic governing, reduced-emission design, freshwater cooling, safety monitoring, diagnostic capability, and worldwide parts and service support all contribute to the generator’s overall value.

Smooth Two-Cylinder Gasoline Engine Performance

The Westerbeke 3.5 MCGB-512 3.5 uses a naturally aspirated, two-cylinder, four-cycle gasoline engine with a horizontal inline configuration.

Its published engine characteristics include:

• Two cylinders in a horizontal inline arrangement
• Four-cycle gasoline operation
• Naturally aspirated air intake
• Approximately 20.3 cubic inches or 0.33 litres of displacement
• 2.40-inch bore
• 2.24-inch stroke
• 10.2:1 compression ratio
• Semi-spherical combustion chambers
• Electronic engine governing
• 2500 RPM rated engine speed
• Approximately 6 horsepower at rated speed
• Aluminium cylinder head and block
• Forged crankshaft supported by two main bearings
• Overhead valves

These specifications are published in Westerbeke’s official March 2024 advanced specification sheet for the 3.5 MCGB-512 3.5 platform.

The two-cylinder configuration, precise electronic throttle control, and specially designed flywheel help provide smoother operation than many compact single-cylinder generator platforms. Westerbeke also highlights the generator’s 2500 RPM engine speed as lower than the 3000 or 3600 RPM commonly associated with many small gasoline generators.

Lower-speed two-cylinder operation may contribute to:

• Reduced vibration
• Smoother power delivery
• Lower mechanical operating frequency
• Improved onboard comfort
• Reduced noise
• Better suitability for overnight and cruising use
• Dependable operation under moderate electrical loads

The generator is rated for a maximum continuous operating inclination of approximately 20 degrees in all directions, although the installation must still provide dependable lubrication, fuel delivery, cooling-water flow, ventilation, and exhaust drainage.

A properly sized marine gasoline generator allows boat owners to operate essential AC systems while underway or at anchor without relying continuously on marina shore power.

3.5 kW Single-Phase Electrical Output

The standard Westerbeke 3.5 MCGB-512 3.5 configuration provides the following electrical ratings:

Electrical Specification	Rating
Rated Electrical Output	3.5 kW
Voltage	230V
Frequency	50 Hz
Electrical Configuration	Single Phase
Number of Wires	Two
Power Factor	1.0
Rated Current	15 Amps
Engine Operating Speed	2500 RPM
Starting Method	Remote Electric Start
Alternator Type	Brushless, Two Pole

Westerbeke also manufactures the MCGB-612 configuration for 120V, 60 Hz operation. However, the official specification clearly states that the 50 Hz and 60 Hz versions are not field-convertible between frequencies. Customers must therefore select the correct model for the vessel’s electrical system when ordering.

The vessel’s continuous electrical demand should remain within the generator’s rated capacity while preserving sufficient reserve for temporary startup loads.

Electrical systems that may require additional starting current include:

• Marine air-conditioning compressors
• Refrigerators and freezers
• Freshwater pumps
• Water heaters
• Battery chargers
• Compact water makers
• Ventilation fans
• Small galley appliances

An undersized generator may experience:

• Voltage reduction
• Frequency instability
• Difficulty starting compressors
• Circuit-breaker operation
• Excessive engine loading
• Protective shutdown
• Reduced generator service life

A professional marine electrical load assessment should consider normal running demand, compressor and motor startup current, simultaneous equipment use, battery-charger consumption, and a practical operating reserve.

A 3.5 kW generator should not automatically be expected to operate every appliance aboard the vessel simultaneously. Load management may be required, particularly when starting an air conditioner, water heater, charger, or other high-demand system.

Multiport Electronic Fuel Injection

One of the principal features of the Westerbeke 3.5 MCGB-512 3.5 is its sequential multiport electronic fuel-injection system.

Multiport EFI supplies fuel through electronically controlled injectors rather than a traditional marine carburettor. Westerbeke states that the system provides improved fuel efficiency, easier starting, increased reliability, reduced emissions, and advanced diagnostic capability.

The EFI system works with the generator’s electronic control unit, engine sensors, fuel pumps, ignition system, and electronic governor.

Potential benefits include:

• Easier cold and warm starting
• Precise fuel delivery
• Improved response to electrical-load changes
• Reduced emissions
• Better high-temperature operation
• Electronic fault monitoring
• Reduced carburettor-related maintenance
• More consistent engine performance

Fuel quality remains important. Water contamination, deteriorated gasoline, blocked filters, deposits, damaged fuel hoses, or unsuitable long-term fuel storage can cause difficult starting, unstable operation, injector problems, or fuel-system damage.

The vessel should use an approved marine gasoline water-separating filter between the fuel tank and generator. Westerbeke’s operator manual notes that gasoline-filter assemblies should comply with applicable United States Coast Guard requirements and typically use metal rather than transparent bowls.

Water-Cooled Returnless Fuel System

The Westerbeke 3.5 MCGB uses a water-cooled returnless gasoline fuel system designed to improve operation in elevated machinery-space temperatures.

The returnless arrangement helps prevent vapour lock by controlling fuel temperature before gasoline reaches the electronic injectors. Vapour lock can occur when fuel becomes excessively hot and forms vapour within the fuel-delivery system, interrupting normal engine operation.

Westerbeke identifies improved high-ambient-temperature performance as one of the main benefits of the water-cooled returnless design.

Published fuel-system features include:

• Sequential multiport EFI
• Electric fuel-transfer pump
• Water-cooled fuel module
• Returnless fuel arrangement
• Electronic ignition and fuel control
• Minimum 1/4-inch fuel-supply piping
• Advanced diagnostic capability

Fuel hoses, shutoff valves, filters, electrical components, and ventilation must comply with applicable marine gasoline-installation standards.

Electronic Governing for Stable Frequency

The Westerbeke 3.5 MCGB-512 3.5 uses an electronic engine governor to maintain consistent engine speed as connected electrical demand changes.

When an air-conditioning compressor, pump, charger, refrigerator, or water heater is connected, the engine experiences an immediate increase in mechanical load. The governor responds by adjusting engine throttle and fuel delivery to maintain the rated operating speed.

Electronic governing helps reduce the engine-speed drop commonly described as “bogging down” and supports more stable frequency when electrical load is applied. Westerbeke lists frequency regulation of approximately 0.7 Hz, or 1%, from no load to full load.

This can improve the operation of:

• Marine air-conditioning systems
• Refrigeration equipment
• Battery chargers
• Freshwater pumps
• Electric motors
• Lighting systems
• Entertainment equipment
• Sensitive onboard electronics

Stable generator performance still depends on correct electrical wiring, grounding, output-cable sizing, ventilation, circuit protection, and sensible load management.

Brushless Two-Pole Marine Alternator

The Westerbeke 3.5 MCGB-512 uses a brushless two-pole marine alternator designed for compact and dependable onboard electricity generation.

Its published alternator features include:

• Brushless construction
• Two-pole design
• Capacitor voltage regulation
• Class H insulation
• Approximately ±5% voltage regulation
• Approximately 0.7 Hz frequency regulation
• Direct-connected moulded centrifugal cooling blower
• Marine electromagnetic-interference control

The 50 Hz alternator configuration supplies 3.5 kW at 230V and 15 amps, using a single-phase, two-wire electrical arrangement with a power factor of 1.0.

Brushless construction reduces maintenance associated with carbon brushes, while Class H insulation provides protection for the alternator windings in demanding machinery-space temperatures.

Potential benefits include:

• Reduced brush-related maintenance
• Compact generator dimensions
• Stable onboard electrical output
• Protected alternator windings
• Practical long-term serviceability
• Compatibility with properly installed marine electrical systems

Westerbeke states that the generator’s electromagnetic-interference performance exceeds the requirements of most marine radio telephones and standard television equipment.

Electrical performance depends on the complete vessel installation, including output-cable sizing, circuit breakers, neutral and grounding arrangements, transfer switching, ventilation, and load distribution.

Freshwater Cooling with Marine Heat Exchanger

The 3.5 MCGB-512 3.5 uses a freshwater cooling system with a marine heat exchanger.

Internal coolant circulates through the engine, while raw water removes heat through the heat-exchanger circuit. The raw water is then discharged through the generator’s water-injected exhaust system.

The cooling arrangement includes:

• Closed freshwater coolant circuit
• Marine heat exchanger
• Coolant-recovery tank
• Belt-driven freshwater pump
• Belt-driven raw-water pump
• Raw-water-cooled exhaust manifold
• Water-injected exhaust elbow
• Thermostatic temperature control

The published cooling-system capacity is approximately 1.46 US quarts or 1.38 litres. The operator manual lists raw-water flow at approximately 3.4 US gallons or 12.9 litres per minute at 2500 RPM, measured before discharge into the exhaust elbow.

Cooling and Exhaust Connection	Specification
Raw-Water Connection	0.50 in. OD
Exhaust-Elbow Connection	2.0 in. OD
Cooling-System Capacity	1.46 qt. / 1.38 L
Approximate Operating Temperature	170–190°F / 77–88°C
Approximate Raw-Water Flow	3.4 GPM / 12.9 LPM

Routine maintenance should include inspection of:

• Coolant level and condition
• Raw-water intake and seacock
• Seawater strainer
• Raw-water pump impeller
• Freshwater circulation pump
• Drive belts
• Heat exchanger
• Cooling hoses and clamps
• Exhaust mixing elbow
• Waterlift muffler
• Wet-exhaust hose
• Siphon-break arrangement

Restricted raw-water flow, a blocked strainer, worn pump impeller, damaged belt, fouled heat exchanger, restricted exhaust elbow, or insufficient machinery-space ventilation may cause overheating.

Low-CO Marine Generator Technology

The Westerbeke 3.5 MCGB-512 3.5 is part of the manufacturer’s low-carbon-monoxide multiport EFI gasoline-generator range.

Westerbeke explains that its multiport EFI generators are designed to reduce normal carbon-monoxide levels by precisely controlling the engine’s air-to-fuel ratio and treating exhaust through a specialised catalyst.

Low-CO does not mean CO-free.

Carbon monoxide is colourless, tasteless, odourless, and potentially fatal. Even a generator that normally produces reduced CO levels can create a dangerous situation if untreated exhaust enters an engine compartment, cabin, cockpit, enclosed canvas area, or space beneath a swim platform.

A correctly installed gasoline-generator system should include:

• Operational carbon-monoxide detectors in occupied areas
• Properly designed wet-exhaust routing
• Adequate machinery-space ventilation
• Secure exhaust hoses and clamps
• A correctly sized waterlift muffler
• Appropriate exhaust-outlet positioning
• Regular catalyst inspection
• Periodic exhaust-system inspection
• Immediate investigation of every CO alarm

Westerbeke’s operator manual states that the generator should not be operated unless the vessel has a functioning marine carbon-monoxide detector. It also warns against swimming or remaining near the exhaust outlet while the generator is running.

The manual advises inspection and replacement of the catalyst when necessary every 500 operating hours. It also calls for verification of satisfactory CO levels seasonally or every 250 operating hours, whichever occurs first, using an appropriate CO analyser.

Correct exhaust-system design is essential because water intrusion can damage the catalyst and compromise generator operation.

Fuel Consumption

Westerbeke publishes the following approximate fuel-consumption figures for the 3.5 MCGB:

Generator Load	Approximate Fuel Consumption
100% Load	0.58 US gal/hr / 2.2 L/hr
75% Load	0.56 US gal/hr / 2.1 L/hr
50% Load	0.47 US gal/hr / 1.8 L/hr
25% Load	0.36 US gal/hr / 1.4 L/hr

Actual fuel consumption may vary according to electrical demand, fuel quality, engine condition, maintenance, machinery-space temperature, installation, and operating environment.

Remote Starting and Automatic Safety Shutdowns

The Westerbeke 3.5 MCGB-512 includes a simple one-touch start-and-stop control panel.

The rocker-switch control eliminates the need for separate start, stop, and fuel-priming switches. The standard panel also includes a running-hour meter and warning-annunciation light strip.

An optional remote start-and-stop panel can be installed using a compatible extension harness connected to the side of the generator’s control box.

Automatic protection systems are designed to warn the operator or stop the generator when potentially damaging conditions are detected.

Published warning and shutdown functions include:

• Engine overspeed
• Engine underspeed
• Low engine-oil pressure
• High exhaust temperature
• High engine-coolant temperature
• Additional electronic-control faults

Other standard electrical and control features include:

• 12V electric starting motor
• 0.6 kW starter
• 5-amp flywheel battery charger
• AC output circuit breaker
• 12V negative-ground electrical system
• Electronic ignition and fuel control
• Running-hour meter
• Warning-annunciation panel

Westerbeke lists a cranking requirement of approximately 70 amps at 70°F. Final battery selection should also consider cable length, voltage drop, ambient temperature, and applicable marine electrical standards.

Automatic shutdown protection helps reduce the risk of serious generator damage but does not replace regular inspection. Engine oil, coolant, raw-water flow, fuel supply, exhaust components, electrical connections, and ventilation should be checked routinely.

Quiet 2500 RPM Operation

Noise and vibration are important considerations aboard smaller boats where the generator may be installed close to cabins, seating areas, or overnight accommodation.

The Westerbeke 3.5 MCGB combines:

• Smooth two-cylinder operation
• Electronically controlled 2500 RPM engine speed
• Precise throttle control
• Specially designed flywheel
• Flexible vibration isolators
• Water-cooled exhaust manifold
• Water-injected marine exhaust
• Compact installation footprint

Westerbeke describes the generator as exceptionally smooth and quiet, highlighting its two-cylinder engine and electronically controlled 2500 RPM operation.

A properly installed quiet marine gasoline generator should also include:

• Correctly sized waterlift muffler
• Proper wet-exhaust routing
• Suitable machinery-space insulation
• Flexible fuel and cooling connections
• Correct vibration-isolator positioning
• Properly supported hoses and cables
• Adequate compartment ventilation
• Sufficient maintenance clearance

Final onboard sound levels depend on the complete installation rather than the generator alone. Hull construction, mounting strength, machinery-space insulation, exhaust routing, ventilation openings, and structural vibration transfer all influence the result. 3.5 MCGB-512 3.5

Optional Drip Shield and Acoustic Installation Considerations

Westerbeke lists an optional drip shield and drip tray for the 3.5 MCGB but does not identify a dedicated factory Sound Guard enclosure among the standard published options for this model.

The dimensional drawing shows an optional drip shield increasing the approximate installation envelope to:

Drip-Shield Measurement	Approximate Specification
Length	30.6 in. / 777 mm
Width	16.4 in. / 417 mm
Height	15.6 in. / 397 mm

Any custom acoustic enclosure must preserve the generator’s ventilation, combustion-air supply, cooling performance, fuel-system safety, exhaust routing, and service access. A poorly designed enclosure may trap heat, restrict airflow, obstruct maintenance points, or create an unsafe gasoline-vapour environment.

Installation Dimensions and Weight

The approximate base-generator dimensions are:

Measurement	Specification
Length	27.1 in. / 688 mm
Width	15.8 in. / 401 mm
Height	15.0 in. / 381 mm
Dry Weight	226 lb. / 102 kg
Maximum Operating Inclination	20° in All Directions

These dimensions and weight are published on Westerbeke’s current 3.5 MCGB-512 3.5product page and official advanced specification sheet.

Before installation, the vessel owner, boat builder, or marine engineer should confirm:

• Machinery-space dimensions
• Mounting-point locations
• Generator lifting and removal route
• Dry and operating weight
• Service clearances
• Machinery-space ventilation
• Ignition-protected electrical installation
• Raw-water inlet position
• Wet-exhaust routing
• Siphon-break requirements
• Fuel-supply connection
• AC output cable route
• Starting-battery cable route
• Remote-control harness route
• Carbon-monoxide detector placement
• Drip-shield clearance

When replacing an existing small marine generator, matching only the electrical output is insufficient. Voltage, frequency, phase, dimensions, weight, mounting centres, cooling, exhaust, fuel supply, ventilation, ignition protection, and control compatibility must also be evaluated.

Applications of the Westerbeke 3.5 MCGB-512 3.5

Small Motor Yachts

The generator may support compatible air conditioning, battery charging, refrigeration, lighting, water heating, entertainment equipment, and electrical outlets.

Express Cruisers

Its compact dimensions and gasoline fuel system make it suitable for compatible gasoline-powered express cruisers requiring independent 230V power away from shore. 3.5 MCGB-512 3.5

Sport-Fishing Boats

The MCGB-512 may provide electricity for refrigeration, battery chargers, lighting, marine electronics, pumps, and selected onboard appliances.

Cabin Boats

The generator may support overnight-comfort systems such as compact air conditioning, lighting, battery charging, water heating, and refrigeration.

Day Boats and Weekend Cruisers

Its relatively small footprint can suit vessels requiring moderate auxiliary power but having limited machinery-space volume.

Marine Refit Projects

The generator may be considered when replacing an ageing, unreliable, or undersized gasoline generator, provided its mechanical, electrical, cooling, exhaust, fuel, and safety requirements are compatible with the vessel.

Technical Specifications of the Westerbeke 3.5 MCGB-512

Specification	Details
Brand	Westerbeke
Model	3.5 MCGB-512
Generator Category	Multiport EFI Marine Gasoline Generator
Rated Electrical Output	3.5 kW
Voltage	230V
Frequency	50 Hz
Electrical Configuration	Single Phase
Number of Wires	Two
Rated Current	15 Amps
Power Factor	1.0
Engine Operating Speed	2500 RPM
Starting Method	Remote Electric Start
Engine Configuration	Two Cylinders, Horizontal Inline
Engine Cycle	Four-Cycle Gasoline
Aspiration	Naturally Aspirated
Displacement	20.3 cu. in. / 0.33 L
Bore × Stroke	2.40 × 2.24 in.
Compression Ratio	10.2:1
Combustion Chamber	Semi-Spherical
Engine Output	Approximately 6 HP at 2500 RPM
Governor	Electronic
Fuel System	Sequential Multiport EFI
Fuel Arrangement	Water-Cooled Returnless System
Fuel-Transfer Pump	Electric
Full-Load Fuel Consumption	0.58 GPH / 2.2 LPH
Alternator Type	Brushless, Two Pole
Voltage Regulation	Approximately ±5%
Frequency Regulation	Approximately 0.7 Hz / 1%
Alternator Insulation	NEMA Class H
Cooling System	Freshwater with Heat Exchanger
Cooling-System Capacity	1.46 qt. / 1.38 L
Raw-Water Connection	0.50 in. OD
Exhaust Connection	2.0 in. OD
Exhaust System	Water-Injected Marine Exhaust
Lubricating-Oil Capacity	1.75 qt. / 1.66 L
Starting System	12V DC, Negative Ground
Starting Motor	0.6 kW
Battery Charger	5 Amps
Cranking Requirement	Approximately 70 Amps at 70°F
Remote Start Connection	Optional Panel and Harness
Maximum Operating Angle	20° in All Directions
Approximate Dimensions	27.1 × 15.8 × 15.0 in.
Approximate Dry Weight	226 lb. / 102 kg
Frequency Conversion	Not Field-Convertible to 60 Hz

The specifications above are based on Westerbeke’s March 2024 advanced specification sheet, current product page, and March 2025 operator manual. Specifications may vary according to serial number, installed accessories, or later manufacturer revisions.  3.5 MCGB-512 3.5

Standard Equipment and Available Options

Typical standard equipment includes:

• Two-cylinder Westerbeke gasoline engine
• Sequential multiport electronic fuel injection
• Water-cooled returnless fuel system
• Electronic engine governor
• Brushless two-pole alternator
• One-touch start-and-stop control panel
• Running-hour meter
• Warning-annunciation light strip
• Automatic safety warnings and shutdowns
• Freshwater cooling system
• Marine heat exchanger
• Coolant-recovery tank
• Electric fuel-lift pump
• AC output circuit breaker
• 5-amp battery charger
• Water-injected exhaust elbow
• Belt-driven raw-water pump
• Flexible vibration isolators
• Lubricating-oil drain hose
• Operator’s manual
• Parts documentation

Available options may include:

• Remote start-and-stop panel
• Extension harness
• Onboard spare-parts Kit A
• Extended-cruising spare-parts Kit B
• Hydro-Hush muffler and fittings
• Anti-siphon valve with stainless-steel loop
• Ship-to-shore transfer switch
• Auxiliary DC power adapter
• Drip shield
• Drip tray

The final package should be confirmed during quotation because accessory availability and generator configuration may vary.

Frequently Asked Questions

What is the Westerbeke 3.5 MCGB-512 price?

The 3.5 MCGB-512 3.5 price depends on current availability, included controls, installation accessories, packing requirements, shipping destination, and export documentation.

How much power does the Westerbeke 3.5 MCGB-512 provide?

It delivers 3.5 kW at 230V and 50 Hz, with rated single-phase output of approximately 15 amps.

Is the Westerbeke 3.5 MCGB-512 a diesel generator?

No. It is a marine gasoline generator powered by a two-cylinder naturally aspirated engine with sequential multiport electronic fuel injection.

What is the difference between the MCGB-512 and MCGB-612?

The 3.5 MCGB-512 3.5 supplies 230V at 50 Hz and 15 amps. The MCGB-612 supplies 120V at 60 Hz and 29 amps. The models are not field-convertible between 50 Hz and 60 Hz.

What does Multiport EFI mean?

Multiport EFI uses electronically controlled fuel injectors to supply fuel precisely to the engine. It supports easier starting, improved fuel efficiency, reduced emissions, better load response, and electronic diagnostic capability.

What does low-CO mean?

Low-CO means the generator is designed to reduce normal carbon-monoxide output through precise electronic fuel control and catalyst-based exhaust after-treatment. It does not mean that the exhaust is free of carbon monoxide. Proper ventilation, exhaust installation, and functioning CO detectors remain essential.

How many cylinders does the engine have?

The generator uses a two-cylinder horizontal inline gasoline engine with approximately 0.33 litres of displacement.

What speed does the engine operate at?

The engine operates at an electronically controlled 2500 RPM.

How much fuel does it consume?

Published full-load fuel consumption is approximately 0.58 US gallons per hour or 2.2 litres per hour.

Does it include remote starting?

The generator uses electric starting, and an optional remote start-and-stop panel and extension harness are available.

Can it operate a marine air conditioner?

It may operate a compatible air-conditioning system, depending on the unit’s running demand and compressor-starting current. A proper electrical-load assessment should be completed before purchase. 3.5 MCGB-512 3.5

Is an acoustic enclosure available?

Westerbeke’s published options list a drip shield and drip tray but do not identify a dedicated factory Sound Guard for this model. Any custom enclosure must preserve ventilation, cooling, safety, and maintenance access.

Can it replace another 3.5 kW marine generator?

Potentially. The installer must verify voltage, frequency, phase, dimensions, weight, mounting, fuel supply, ventilation, ignition protection, raw-water cooling, exhaust routing, electrical connections, and service access.

Request a Quote for the Westerbeke 3.5 MCGB-512

The New 3.5 MCGB-512 3.5 kW 50 Hz Multiport EFI Marine Gasoline Generator is a practical choice for owners of smaller gasoline-powered vessels requiring compact, lightweight, and dependable marine auxiliary power.

Its 3.5 kW output, 230V single-phase configuration, electronically controlled 2500 RPM operation, sequential multiport EFI, water-cooled returnless fuel system, low-CO technology, brushless alternator, freshwater cooling, automatic safety protection, and compact installation footprint make it suitable for a wide range of recreational marine applications.

Contact our marine generator specialists to confirm:

• Current stock availability
• Generator serial number and production date
• Warranty eligibility
• 230V, 50 Hz electrical configuration
• Included control panel and harness
• Catalyst and emissions-system condition
• Included installation accessories
• Packing dimensions and shipment weight
• Domestic or international shipping options