5.5 EDC D-NET – 5.5kW, 60 Hz Diesel Generator

New Westerbeke 5.5 EDC D-NET 5.5 kW 60 Hz Marine Diesel Generator For Sale

Reliable Low-Speed Marine Power for Yachts and Professional Vessels

The New Westerbeke 5.5 EDC D-NET 5.5 kW 60 Hz Marine Diesel Generator is a compact, low-speed, electronically governed marine diesel generator set engineered to provide stable onboard electricity for motor yachts, sailing yachts, cruising catamarans, liveaboard boats, passenger vessels, and light commercial marine applications. 5.5 EDC D-NET 5.5 Designed for compatible 120V, 60 Hz marine electrical systems, the Westerbeke 5.5 EDC delivers 5.5 kW of single-phase electrical power while operating at 1800 RPM. Its naturally aspirated three-cylinder diesel engine, brushless four-pole alternator, electronic governor, freshwater cooling, self-bleeding fuel system, digital diagnostics, remote starting, and automatic safety shutdowns make it a dependable source of auxiliary power. 5.5 EDC D-NET 5.5

The standard 60 Hz configuration supplies approximately 45.8 amps at 120V, using a four-wire single-phase arrangement with a power factor of 1.0. The generator platform was also designed to be adjustable for 50 Hz operation, where the corresponding 5.0 EDC configuration is rated at 5.0 kW, 230V, 21.7 amps, and 1500 RPM. Any frequency conversion should be completed by a qualified technician following Westerbeke procedures. 5.5 EDC D-NET 5.5

Its 5.5 kW capacity may support compatible marine air-conditioning systems, refrigeration, battery chargers, freshwater pumps, lighting, navigation electronics, communication systems, water heaters, electrical outlets, and selected galley appliances. The exact combination depends on each appliance’s running demand and startup current. 5.5 EDC D-NET 5.5

The original 5.5 EDC D-NET 5.5 is no longer in production. Westerbeke continues to provide manuals, wiring diagrams, installation drawings, diagnostic software, parts information, and technical documentation for the model. A generator marketed as new will therefore normally be unused dealer stock, warehouse inventory, or a surplus unit rather than a recently manufactured generator.

Customers looking for the Westerbeke 5.5 EDC D-NET 5.5 for sale should confirm its serial number, production date, storage history, warranty eligibility, voltage and frequency configuration, D-NET control package, included accessories, and overall condition before ordering.

Purpose-Built Westerbeke Marine Generator Engineering

The Westerbeke 5.5 EDC D-NET 5.5 generator was developed specifically for onboard marine electricity generation. Unlike portable generators or general-purpose industrial units adapted for vessel use, it integrates marine cooling, wet-exhaust compatibility, electronic speed control, digital monitoring, vibration isolation, remote operation, and automatic engine protection.

The generator is designed for operating conditions that may include:

• Continuous vessel movement and vibration
• Salt-laden marine air
• High machinery-space humidity
• Restricted installation space
• Changing electrical demand
• Elevated compartment temperatures
• Extended operation away from shore power
• Simultaneous use of multiple onboard systems

The D-NET platform was offered with standard Westerlink communication or optional NMEA 2000-compliant databus communication. Compatible components can communicate through a shared vessel network, reducing the amount of individual wiring normally required for separate displays and monitored functions. 5.5 EDC D-NET 5.5 Its digital control system provides straightforward operating information rather than relying only on difficult-to-interpret numerical fault codes. The display monitors battery voltage, generator voltage, frequency, engine-oil pressure, coolant temperature, and exhaust temperature. Illuminated indicators provide an at-a-glance view of generator condition, while additional operating and diagnostic information can be reviewed through the screen. 5.5 EDC D-NET 5.5

Customers comparing the Westerbeke 5.5 EDC D-NET 5.5 price should consider more than the generator’s rated output. Low-speed operation, D-NET monitoring, electronic governing, marine cooling, alternator construction, service accessibility, optional sound attenuation, and continued parts support all contribute to its overall value. 5.5 EDC D-NET 5.5

Smooth Three-Cylinder Diesel Performance

The Westerbeke 5.5 EDC uses a naturally aspirated, three-cylinder, four-cycle diesel engine with a vertical inline configuration.

Its published engine characteristics include:

• Three cylinders in a vertical inline arrangement
• Four-cycle diesel operation
• Naturally aspirated air intake
• Approximately 58.09 cubic inches or 0.952 litres of displacement
• 2.99-inch bore
• 2.76-inch stroke
• 23:1 compression ratio
• Swirl-type combustion system
• Electronic engine governing
• 1800 RPM operation at 60 Hz
• Approximately 11 horsepower at 1800 RPM
• Cast-iron cylinder head and block
• Forged crankshaft supported by four main bearings
• Rotating overhead valves

These specifications are published in Westerbeke’s official advanced specification sheet for the 5.5/5.0 EDC generator platform.

The three-cylinder engine provides smoother power delivery than many compact single-cylinder and twin-cylinder generator platforms. Its 1800 RPM operating speed also produces a lower mechanical frequency than high-speed 3600 RPM marine generators. 5.5 EDC D-NET 5.5

Lower-speed three-cylinder operation may contribute to:

• Reduced vibration
• Smoother power delivery
• Lower mechanical operating noise
• Improved onboard comfort
• Better suitability for extended operation
• Reduced speed variation under load
• Longer service life when correctly maintained

The engine uses a tuned air-intake silencer designed to reduce induction noise. Westerbeke combines this with electronic governing and fail-safe rubber anti-vibration mounts to improve onboard comfort. 5.5 EDC D-NET 5.5

The official advanced specification lists a maximum continuous operating inclination of up to 25 degrees in all directions. Installation conditions must still provide reliable lubrication, cooling-water flow, fuel supply, ventilation, and exhaust drainage.

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

5.5 kW Single-Phase Electrical Output

The standard Westerbeke 5.5 EDC D-NET 5.5-614 configuration provides the following electrical ratings:

These ratings are published in Westerbeke’s official 5.5/5.0 EDC technical specification.

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

Electrical systems that may require substantially more current during startup include:

• Marine air-conditioning compressors
• Refrigerators and freezers
• Freshwater pumps
• Seawater pumps
• Battery chargers
• Compact water makers
• Ventilation motors
• Galley appliances
• Electric water heaters

An undersized generator may experience:

• Voltage reduction
• Frequency instability
• Difficult compressor or motor starting
• Circuit-breaker operation
• Excessive engine loading
• Protective shutdown
• Increased exhaust smoke
• Reduced generator service life

A professional marine electrical load assessment should consider continuous demand, motor-starting current, simultaneous appliance operation, battery-charger consumption, voltage drop, and a practical operating reserve.

A 5.5 kW generator should not automatically be expected to operate every appliance aboard the vessel simultaneously. Load management may be necessary when starting air-conditioning compressors, water heaters, pumps, chargers, or other high-demand systems.

Electronic Governing for Stable Frequency

One of the principal features of the Westerbeke 5.5 EDC D-NET 5.5 is its electronic engine governor.

When an air-conditioning compressor, pump, charger, refrigerator, or electric motor starts, the generator experiences an immediate increase in mechanical demand. The electronic governor responds by adjusting fuel delivery to help maintain the rated 1800 RPM operating speed.  5.5 EDC D-NET 5.5

Westerbeke describes the electronic governing system as virtually eliminating the speed “droop” that can occur when electrical load is applied. Published frequency regulation is approximately 0.5 Hz, or 0.60%, from no load to full load. 5.5 EDC D-NET 5.5

Stable engine speed can improve the operation of:

• Marine air-conditioning systems
• Refrigeration equipment
• Battery chargers and inverter-chargers
• Freshwater and seawater pumps
• Electric motors
• Lighting circuits
• Navigation electronics
• Communication systems
• Sensitive onboard monitoring equipment

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

Brushless Four-Pole Marine Alternator

The Westerbeke 5.5 EDC uses a brushless four-pole revolving-field alternator designed for dependable onboard electrical production.

Its published alternator features include:

• Brushless construction
• Four-pole design
• Revolving electrical field
• Power takeoff interface
• Class H winding insulation
• Approximately ±5% voltage regulation
• Approximately 0.5 Hz frequency regulation
• Direct-connected centrifugal cooling blower
• Marine electromagnetic-interference control

These alternator characteristics are listed in Westerbeke’s official advanced specification sheet.

The four-pole design allows the generator to produce 60 Hz electricity at 1800 RPM. By comparison, a conventional two-pole 60 Hz generator generally operates at 3600 RPM.

Potential benefits include:

• Lower operating speed
• Reduced mechanical frequency
• Reduced brush-related maintenance
• Stable onboard electrical output
• Improved winding protection
• Better suitability for extended marine use
• Lower operating noise than many high-speed alternatives

Westerbeke specifies Class H insulation and states that the alternator’s electromagnetic-interference performance exceeds the requirements of most marine radiotelephones and standard televisions.

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

Freshwater Cooling with Marine Heat Exchanger

The Westerbeke 5.5 EDC uses a freshwater cooling system with a marine heat exchanger.

Internal coolant circulates through the engine and freshwater-cooled exhaust manifold. Raw water removes heat through the heat exchanger before being discharged through the generator’s water-injected marine exhaust system.

The cooling arrangement includes:

• Closed freshwater coolant circuit
• Marine heat exchanger
• Coolant-recovery tank
• Gear-driven raw-water pump
• Freshwater circulation pump
• Freshwater-cooled cast-aluminium exhaust manifold
• 45-degree water-injected exhaust elbow
• Thermostatically controlled engine temperature

The published cooling-system capacity is approximately 4 US quarts or 3.78 litres. The generator uses a 1-inch outside-diameter seawater connection and a 2-inch outside-diameter exhaust-elbow connection.

The operator manual lists a normal operating-temperature range of approximately 170–190°F, or 77–88°C, and raw-water flow of approximately 6.5 US gallons per minute before discharge into the exhaust elbow.

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 belt
• Heat exchanger
• Cooling hoses and clamps
• Exhaust mixing elbow
• Waterlift muffler
• Wet-exhaust hose
• Siphon-break arrangement
• Machinery-space ventilation

Restricted raw-water flow, a blocked strainer, worn impeller, fouled heat exchanger, damaged exhaust elbow, or inadequate ventilation may cause overheating even when the generator is operating below its maximum electrical output.

Self-Bleeding Marine Fuel System

The 5.5 EDC uses a self-bleeding diesel fuel system designed to simplify routine operation and servicing.

Published fuel-system features include:

• Bosch-type fuel-injection pump
• Solenoid fuel shutoff
• Throttle-type injectors
• Secondary replaceable fuel filter
• 12V electric fuel-transfer pump
• Fuel supply and return connections
• Self-bleeding fuel arrangement
• Tuned air-intake silencer

The electric fuel-transfer pump assists fuel circulation, while the self-bleeding system reduces the amount of manual bleeding normally required following routine filter replacement or minor fuel-system servicing.

Westerbeke specifies a minimum 1/4-inch inside diameter for the fuel piping and a maximum 3/8-inch inside diameter within the published supply-and-return arrangement. The final line sizes and routing should follow the applicable installation manual.

Published approximate full-load fuel consumption is:

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

Clean diesel fuel remains essential. A correctly sized marine fuel-water separator should be installed between the vessel’s tank and generator. Fuel lines should be securely supported, protected from excessive heat and abrasion, and fitted with suitable shutoff valves.

Remote Starting, Digital Monitoring and Automatic Safety Shutdowns

The Westerbeke 5.5 EDC D-NET 5.5 includes a digital display and diagnostics panel designed to simplify generator operation, monitoring, and troubleshooting.

The D-NET panel monitors:

• Starting-battery voltage
• Generator voltage
• Generator frequency
• Engine-oil pressure
• Engine-coolant temperature
• Exhaust temperature
• Generator operating status
• Warning and shutdown conditions

Illuminated indicators provide an at-a-glance view of generator condition. Additional information can be reviewed as text through the digital screen, allowing the operator to identify warnings without decoding basic numerical fault codes.

Depending on the installed configuration, remote control and communication options may include:

• Westerlink databus communication
• Optional NMEA 2000-compliant communication
• Remote Westerlink digital display
• Remote NMEA 2000 digital display
• Remote start-and-stop panel

Actual network compatibility should be confirmed from the generator’s serial number, electronic-control unit, communication module, wiring harness, and installed vessel network.

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

Published safety shutdowns include:

• Engine overspeed
• Engine underspeed
• Low engine-oil pressure
• High exhaust temperature
• High engine-coolant temperature

When a fault occurs, the failure light illuminates and the digital display identifies the affected system. The condition must be corrected and the DC circuit breaker reset before restarting the generator.

Other standard electrical features include:

• 12V electric starting motor
• 50-amp battery-charging alternator
• 12V glow-plug starting aid
• 12V negative-ground electrical system
• AC output circuit breaker
• DC control protection
• Remote electric starting
• Power takeoff interface

The operator manual lists a dedicated starting battery capacity of approximately 800–1,000 cold-cranking amps and an engine cranking current of approximately 190–200 amps when cold. Final battery and cable selection should account for cable length, voltage drop, ambient temperature, and applicable marine standards.

Automatic shutdown protection helps reduce the risk of serious engine or alternator damage but does not replace routine inspection. Engine oil, coolant, raw-water flow, fuel supply, electrical connections, hoses, belts, and exhaust components should be checked regularly.

Quiet 1800 RPM Operation

Noise and vibration are important considerations aboard yachts, passenger vessels, liveaboard boats, and cruising craft where the generator may be installed close to accommodation areas.

The Westerbeke 5.5 EDC D-NET 5.5 combines:

• Low-speed 1800 RPM operation
• Smooth three-cylinder diesel performance
• Electronic governing
• Tuned air-intake silencer
• Fail-safe rubber anti-vibration mounts
• Freshwater-cooled exhaust manifold
• Water-injected marine exhaust
• Optional Sound Guard SST enclosure

Westerbeke describes the 5.5 EDC D-NET 5.5 as smooth and quiet, attributing this performance to its three-cylinder engine, low-speed operation, tuned intake system, and electronic governor.

A properly installed quiet marine diesel generator should also include:

• A 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 electrical cables
• Adequate machinery-space ventilation
• Sufficient maintenance clearance

Final onboard sound levels depend on the complete installation rather than the generator alone. Hull construction, machinery-space insulation, ventilation openings, mounting strength, exhaust routing, and structural vibration transfer all influence the result. 5.5 EDC D-NET 5.5

Optional Westerbeke Sound Guard SST

For installations requiring additional sound attenuation, the Westerbeke 5.5 EDC D-NET 5.5 can be fitted with the optional Westerbeke Sound Guard SST, originally identified as part number 52709 for the digital generator.

The enclosure uses a corrosion-resistant stainless-steel base and frame with powder-coated aluminium panels. Removable panels provide service access while helping reduce airborne generator noise.

Approximate Sound Guard SST specifications are:

These dimensions and weight are published in Westerbeke’s official 5.5/5.0 EDC specification sheet.

The enclosure increases the generator’s total installation dimensions and weight. Machinery-space access, ventilation, hose routing, cable entry, and panel-removal clearance should therefore be checked before purchase.

Because the original EDC model is discontinued, availability of a compatible new Sound Guard should be verified using the generator’s serial number and Westerbeke parts documentation.

Installation Dimensions and Weight

The approximate base-generator dimensions are:

The current Westerbeke product-support page lists the overall dimensions as approximately 27.8 × 18.5 × 20.6 inches and the dry weight as 373 lb. The advanced dimensional drawing shows a principal body length of 27.1 inches plus an additional projecting section, accounting for the published overall length.

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

• Machinery-space dimensions
• Mounting-point positions
• Generator lifting and removal route
• Dry and operating weight
• Service clearances
• Machinery-space ventilation
• Raw-water inlet location
• Wet-exhaust routing
• Siphon-break requirements
• Fuel supply and return
• AC output cable route
• Starting-battery cable route
• Remote-control harness route
• Westerlink or NMEA 2000 cable route
• Sound Guard clearance
• Access to filters, belts, oil fill, and service points

When replacing an existing boat generator, matching only its electrical rating is insufficient. Voltage, frequency, phase, dimensions, mounting centres, weight, cooling, exhaust, fuel connections, control integration, and service access must also be evaluated.

Applications of the Westerbeke 5.5 EDC D-NET

Motor Yachts

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

Sailing Yachts and Cruising Catamarans

Its low-speed diesel operation and compact dimensions make it suitable for compatible cruising vessels requiring dependable onboard electricity while underway or at anchor.

Liveaboard Vessels

The generator may support refrigeration, battery banks, freshwater systems, lighting, electrical outlets, climate-control equipment, and selected domestic appliances.

Sport-Fishing Boats

The 5.5 EDC may provide electricity for refrigeration, bait-well systems, battery chargers, lighting, communications, marine electronics, and other operational loads.

Workboats and Professional Craft

It may serve as a compact commercial marine generator for pumps, chargers, communication systems, work lighting, refrigeration, and monitoring equipment.

Marine Refit Projects

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

Technical Specifications of the Westerbeke 5.5 EDC D-NET

The specifications above are based on Westerbeke’s official product-support page, advanced specification sheet, and operator documentation. Individual configurations may vary according to serial number, production date, voltage arrangement, control package, and installed accessories.

Standard Equipment and Available Options

Typical original standard equipment includes:

• Three-cylinder Westerbeke diesel engine
• Brushless four-pole alternator
• Electronic engine governor
• Digital display and diagnostics panel
• Standard Westerlink communication
• Automatic safety shutdowns
• AC output circuit breaker
• 50-amp battery-charging alternator
• Power takeoff interface
• Self-bleeding fuel system
• Electric fuel-transfer pump
• Freshwater cooling system
• Marine heat exchanger
• Coolant-recovery tank
• Gear-driven raw-water pump
• 45-degree water-injected exhaust elbow
• Tuned air-intake silencer
• Fail-safe rubber anti-vibration mounts
• Lubricating-oil drain hose
• Drip tray
• Top and side oil-fill points
• Belt guard
• Operator’s manual and parts documentation

These items are listed as standard features in Westerbeke’s official advanced specification.

Available original options may include:

• Westerbeke Sound Guard SST
• NMEA 2000-compliant databus communication
• NMEA 2000 remote digital display
• Westerlink remote digital display
• Remote start-and-stop panel
• Hydro-Hush muffler and fittings
• Marine fuel-water separator
• Anti-siphon valve with one-inch stainless-steel loop
• Ship-to-shore transfer switch
• Power takeoff adapter
• Onboard spare-parts Kit A
• Extended-cruising spare-parts Kit B
• Technical manual
• White generator finish

The final package should be confirmed during quotation because the model is discontinued and availability of original accessories may vary.

Frequently Asked Questions

What is the Westerbeke 5.5 EDC D-NET 5.5 price?

The Westerbeke 5.5 EDC D-NET 5.5 price depends on current availability, generator condition, serial number, production date, voltage and frequency configuration, installed controls, optional Sound Guard, included accessories, packing requirements, and shipping destination.

How much power does the Westerbeke 5.5 EDC provide?

It produces 5.5 kW at 120V, 60 Hz, and 1800 RPM, with rated single-phase output of approximately 45.8 amps.

Is the Westerbeke 5.5 EDC single phase?

Yes. The standard 5.5 EDC-614 configuration supplies 120V single-phase electricity using a four-wire arrangement and a power factor of 1.0.

Is the Westerbeke 5.5 EDC D-NET 5.5 still manufactured?

No. Westerbeke identifies the original 5.5 EDC D-NET 5.5 as no longer in production. Manuals, wiring diagrams, installation drawings, diagnostic software, parts information, and technical documents remain available.

How many cylinders does the engine have?

The generator uses a naturally aspirated three-cylinder vertical inline diesel engine with approximately 0.952 litres of displacement.

What speed does the engine operate at?

The 5.5 kW, 60 Hz configuration operates at 1800 RPM.

Does it use electronic governing?

Yes. Its electronic governor helps maintain engine speed and stable frequency as connected electrical demand changes. Published frequency regulation is approximately 0.5 Hz from no load to full load.

Is the 5.5 EDC D-NET 5.5 compatible with NMEA 2000?

The generator was available with optional NMEA 2000-compliant communication and a compatible remote digital display. The installed configuration should be verified using the generator serial number and control-package information.

Can the generator be converted to 50 Hz?

Westerbeke identifies the platform as adjustable to 50 or 60 Hz. The 50 Hz configuration is rated at 5.0 kW, 230V, 21.7 amps, and 1500 RPM. Conversion should be completed by a qualified marine generator technician.

How much fuel does it consume?

Published approximate full-load fuel consumption is 0.61 US gallons per hour or 2.3 litres per hour at 1800 RPM.

Is a sound enclosure available?

The original generator was available with the optional Sound Guard SST, part number 52709, measuring approximately 33.3 × 21.1 × 22.3 inches. Current availability should be confirmed using the generator serial number.

Does the generator include remote starting?

Yes. The standard generator supports remote electric starting, with optional remote start-and-stop controls and digital displays available for compatible Westerlink or NMEA 2000 installations.

Can it operate a marine air conditioner?

It may operate a compatible marine air-conditioning system, depending on the unit’s running demand, compressor-starting current, vessel wiring, and other simultaneous loads. A professional electrical-load assessment should be completed before purchase. 5.5 EDC D-NET 5.5

Can it replace another 5.5 kW marine generator?

Potentially. The installer must verify voltage, frequency, phase, dimensions, weight, mounting centres, fuel connections, ventilation, raw-water cooling, exhaust routing, electrical wiring, digital controls, and service access.

Request a Quote for the Westerbeke 5.5 EDC D-NET

The Westerbeke 5.5 EDC D-NET 5.5 kW 60 Hz Marine Diesel Generator is a dependable option for yacht owners, boat builders, shipyards, marine installers, and professional operators requiring compact, low-speed marine auxiliary power.

Its 5.5 EDC D-NET 5.5 kW output, smooth three-cylinder diesel engine, electronically governed 1800 RPM operation, brushless four-pole alternator, freshwater cooling, self-bleeding fuel system, digital D-NET diagnostics, remote-start capability, automatic protection, and optional Sound Guard SST make it suitable for a broad range of marine applications.

Contact our marine generator specialists to confirm:

• Current stock availability
• New, unused, rebuilt, or used condition
• Generator serial number and production date
• Warranty eligibility
• 120V, 60 Hz electrical configuration
• D-NET control-panel version
• Westerlink or NMEA 2000 compatibility
• Included remote controls
• Sound Guard SST availability
• Included installation accessories
• Packing dimensions and shipment weight
• Domestic or international shipping options