6.5 EDT D-NET – 6.5kW, 60 Hz Diesel Generator

Description

Westerbeke 6.5 EDT D-NET 6.5 kW 60 Hz Marine Diesel Generator

Low-Speed Digital Marine Power with D-NET Control

The Westerbeke 6.5 EDT D-NET 6.5 kW 60 Hz marine diesel generator is a compact, electronically governed generator designed to provide stable onboard electricity for motor yachts, sailing yachts, cruising catamarans, passenger boats, liveaboard vessels, and light commercial craft.

Operating at 1800 RPM, the 6.5 EDT combines a naturally aspirated three-cylinder diesel engine with a brushless four-pole alternator, digital monitoring, electronic governing, freshwater cooling, a self-bleeding fuel system, remote starting, and automatic safety shutdowns. The standard 6.5 EDT-614 configuration supplies 120/240V single-phase power at 60 Hz, producing 54.1 amps at 120V or 27.0 amps at 240V.

Production-status note: Westerbeke currently classifies the 6.5 EDT D-NET as an older model that is no longer in production. Availability may therefore be limited to remaining new stock, unused surplus units, or professionally reconditioned generators. Westerbeke continues to provide technical documents and parts information for the model.

Designed for Marine Electrical Applications

The Westerbeke D-NET generator range was developed specifically for marine use, combining low-speed diesel performance with digital controls and network-capable communication.

The 6.5 EDT incorporates marine-specific features such as:

• Freshwater cooling with a marine heat exchanger
• Gear-driven raw-water pump
• Water-injected exhaust elbow
• Freshwater-cooled exhaust manifold
• Fail-safe anti-vibration mounts
• Tuned air-intake silencer
• Electronic engine governing
• Digital display and diagnostics
• Remote starting and stopping
• AC output circuit breaker
• Automatic protective shutdowns
• Self-bleeding diesel fuel system

These features make the generator suitable for compatible marine installations where dependable auxiliary power, reduced vibration, digital monitoring, and practical maintenance access are important.

6.5 kW Electrical Output at 60 Hz

The Westerbeke 6.5 EDT-614 produces 6.5 kW of single-phase electrical power at 60 Hz while operating at 1800 RPM.

The electrical configuration is suitable for compatible North American and other 60 Hz marine electrical systems. The official specification also describes the generator platform as adjustable between 50 and 60 Hz, but any conversion must follow approved Westerbeke procedures and include confirmation of the resulting electrical rating.

Its 6.5 kW capacity may support compatible onboard loads such as:

• Battery chargers and inverter-chargers
• Refrigerators and freezers
• Freshwater pumps
• Seawater pumps
• Navigation electronics
• Communication systems
• Cabin and deck lighting
• Entertainment systems
• Electrical outlets
• Selected galley appliances
• Appropriately sized air-conditioning systems

Actual suitability depends on the vessel’s continuous demand, motor-starting loads, simultaneous equipment use, wiring arrangement, and required operating reserve.

Smooth Three-Cylinder Diesel Engine

The 6.5 EDT uses a naturally aspirated, three-cylinder, four-stroke diesel engine with 58.09 cubic inches or approximately 0.952 litres of displacement.

The engine develops approximately 10.8 hp at 1800 RPM and uses a 23:1 compression ratio, swirl-type combustion system, Bosch-type injection pump, throttle-type injectors, and glow plugs for cold starting. Its cast-iron cylinder head and block are combined with a forged crankshaft supported by four main bearings.

The three-cylinder layout and low 1800 RPM operating speed help provide smoother performance than many small, high-speed generator sets.

Electronic Governing for Stable Frequency

The Westerbeke 6.5 EDT D-NET 6.5 is fitted with an electronic engine governor.

When a pump, compressor, charger, or other substantial load is connected, the generator engine experiences an immediate increase in mechanical demand. The governor adjusts fuel delivery to help maintain the correct engine speed and reduce frequency drop.

Westerbeke’s published frequency regulation is approximately 0.5 Hz, or 0.60%, from no load to full load. The manufacturer describes the system as virtually eliminating the speed “droop” commonly experienced when loads are applied.

Stable frequency supports reliable operation of compatible:

• Battery chargers
• Refrigeration compressors
• Air-conditioning equipment
• Electric motors and pumps
• Navigation electronics
• Communication equipment
• Lighting circuits
• Monitoring systems

Electronic governing improves load response but does not replace correct generator sizing.

D-NET Digital Monitoring and Diagnostics

The D-NET digital control system provides operational information and diagnostic monitoring through an illuminated display panel.

Published monitored functions include:

• Starting-battery voltage
• Generator voltage
• Generator frequency
• Engine-oil pressure
• Coolant temperature
• Exhaust temperature
• Generator operating condition

The display uses written diagnostic information rather than requiring the operator to interpret numerical fault codes. Indicator lights provide an immediate visual check, while additional information can be reviewed through the digital screen.

The model was offered with standard Westerlink communication or optional NMEA 2000-compatible databus communication, depending on its specification. Remote digital displays were available for both configurations.

NMEA 2000 Network Integration

When equipped with the appropriate NMEA 2000 configuration, the 6.5 EDT can communicate with compatible onboard network components through a shared databus. 6.5 EDT D-NET 6.5

A properly configured network can reduce the number of individual wiring harnesses required throughout the vessel and allow compatible instruments, controls, navigation systems, and displays to exchange operating information through a common backbone.

Network compatibility should be confirmed before purchase because this legacy generator may have been produced with Westerlink or NMEA 2000 control architecture. The existing control module, display, harness, and network accessories must be identified before ordering replacement components.

Brushless Four-Pole Alternator

The 6.5 EDT D-NET 6.5 uses a brushless, four-pole, revolving-field alternator.

Its published alternator design includes:

• Brushless construction
• Four-pole configuration
• Revolving electrical field
• Full-torque power take-off interface
• Class H insulation
• Direct-connected centrifugal cooling blower
• Approximately ±5% voltage regulation
• Approximately 0.5 Hz frequency regulation

The four-pole alternator produces 60 Hz electricity at 1800 RPM. Brushless construction reduces maintenance associated with carbon brushes, while Class H insulation provides additional thermal protection for the windings.

Westerbeke also states that its published electromagnetic-interference level exceeds the requirements of most marine radio telephones and standard televisions. Correct grounding, cable routing, circuit protection, and installation remain necessary for reliable onboard performance.

Freshwater Cooling with Marine Heat Exchanger

The Westerbeke 6.5 EDT D-NET 6.5 uses a freshwater cooling system with a shell-and-tube heat exchanger.

Engine coolant circulates through the cylinder block, cylinder head, and freshwater-cooled exhaust manifold. Raw water drawn through the vessel’s seawater intake removes heat through the exchanger before being discharged through the water-injected exhaust system.

The cooling arrangement includes:

• Closed freshwater coolant circuit
• Shell-and-tube heat exchanger
• Coolant-recovery tank
• Gear-driven raw-water pump
• Freshwater-cooled exhaust manifold
• 45-degree water-injected exhaust elbow
• One-inch raw-water connection

The published coolant capacity is approximately 4 US quarts or 3.78 litres.

Routine maintenance should include inspection of the coolant, raw-water strainer, seawater-pump impeller, heat exchanger, hoses, clamps, exhaust elbow, siphon break, and wet-exhaust system.

Self-Bleeding Diesel Fuel System

The generator uses a self-bleeding fuel system with primary and secondary filtration, a Bosch-type injection pump, throttle-type injectors, and a 12V electric fuel-transfer pump.

Published minimum and maximum fuel-line internal diameters are:

A correctly installed marine fuel system should include a suitable fuel-water separator, properly sized supply and return lines, accessible shutoff valves, secure hose supports, and clean diesel fuel.

Approximate Fuel Consumption

Westerbeke publishes the following approximate consumption figures for the 6.5 EDT D-NET 6.5 operating at 1800 RPM:

Actual fuel use will vary with electrical load, generator condition, fuel quality, installation, ambient temperature, ventilation, and maintenance.

Remote Starting and Safety Shutdowns

The 6.5 EDT D-NET 6.5 includes remote-start capability, a digital control panel, an AC circuit breaker, and automatic protective shutdowns.

The safety system monitors:

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

The standard generator also includes a 50-amp, 12V battery-charging alternator, a 12V starting motor, and glow-plug starting assistance. 6.5 EDT D-NET 6.5

These systems help protect the engine when abnormal operating conditions are detected. They do not replace routine checks of oil, coolant, seawater flow, fuel supply, exhaust components, wiring, belts, and hoses.

Full-Torque Power Take-Off Interface

The alternator design incorporates a power take-off interface. With correctly engineered accessories, the interface may support compatible hydraulic or mechanical systems.

Potential applications may include:

• Hydraulic pumps
• Bow or stern thruster systems
• Small compressors
• Winches
• Approved emergency-drive arrangements

Any power take-off installation must be engineered to prevent overloading the engine or compromising electrical output.

Tuned Air Intake and Quiet 1800 RPM Operation

The Westerbeke 6.5 EDT D-NET 6.5 combines a low-speed three-cylinder diesel engine with a tuned air-intake silencer, freshwater-cooled exhaust manifold, water-injected exhaust, and fail-safe rubber anti-vibration mounts.

Westerbeke describes the platform as providing smooth and quiet operation, with electronic governing further reducing noticeable changes in engine speed when electrical loads are connected.

Final onboard noise will also depend on:

• Generator foundation
• Engine-room insulation
• Ventilation openings
• Exhaust-hose routing
• Waterlift-muffler selection
• Hose and cable support
• Structural vibration transmission

Optional Westerbeke Sound Guard SST

The 6.5 EDT was offered with an optional Westerbeke Sound Guard SST, part number 52709, for additional sound attenuation.

The enclosure uses a corrosion-resistant stainless-steel base and frame with powder-coated aluminium panels. Westerbeke lists the 6.5/5.0 EDT among the generators compatible with its 5.0–7.6 kW Sound Guard platform. 6.5 EDT D-NET 6.5

The enclosure dimensions should be added to the generator’s installation requirements when calculating service access and machinery-space clearance.

Dimensions and Installation Planning

The current Westerbeke product summary lists the generator at approximately:

The advanced specification sheet lists a dry weight of approximately 407 lb. or 185 kg, indicating that figures may differ by production version or documentation revision. The approved installation drawing and serial-number-specific documentation should therefore be used when planning the foundation, lifting arrangement, access route, and vessel weight distribution.

Additional installation data includes:

Before installation, confirm:

• Machinery-space dimensions
• Mounting-hole positions
• Service access
• Generator removal route
• Raw-water supply
• Wet-exhaust configuration
• Siphon-break requirements
• Fuel supply and return lines
• Starting-battery cable size
• AC output wiring
• Grounding and bonding
• Shore-power transfer arrangement
• Digital control and network compatibility

Typical Marine Applications

The Westerbeke 6.5 EDT D-NET 6.5 may be suitable for:

Motor Yachts

Providing compatible power for battery charging, refrigeration, pumps, lighting, electronics, entertainment systems, and selected comfort loads.

Sailing Yachts and Catamarans

Supplying independent onboard electricity while cruising or remaining at anchor.

Liveaboard Vessels

Supporting refrigeration, lighting, water systems, charging equipment, electrical outlets, and essential domestic services.

Workboats and Professional Craft

Serving as a compact commercial marine generator for communications, lighting, pumps, refrigeration, chargers, and operational systems.

Generator Replacement Projects

Replacing an existing marine generator where the output, voltage, frequency, dimensions, cooling, exhaust, wiring, fuel system, and control requirements are compatible.

Complete Technical Specifications

The model remains supported by Westerbeke through technical documents and parts information, but it is no longer listed as a current-production generator. 6.5 EDT D-NET 6.5

Standard Equipment

Original factory literature lists the following standard features:

• Three-cylinder diesel engine
• Brushless four-pole alternator
• Electronic governor
• Digital display and diagnostic panel
• Remote starting
• Automatic safety shutdowns
• AC circuit breaker
• 50-amp battery-charging alternator
• Power take-off interface
• Self-bleeding fuel system
• Freshwater cooling
• Coolant-recovery tank
• Gear-driven raw-water pump
• Water-injected exhaust elbow
• Tuned air-intake silencer
• Fail-safe anti-vibration mounts
• Oil-drain hose and drip tray
• Top and side oil-fill points
• Belt guard
• Operator’s manual and parts list

The original specification sheet also advertised a five-year limited warranty. Because the model is now discontinued, warranty coverage for any currently available unit must be confirmed according to its condition, serial number, seller, commissioning date, and Westerbeke registration eligibility. 6.5 EDT D-NET 6.5

Optional Equipment

Original options included:

• NMEA 2000-compatible databus communication
• Remote NMEA 2000 digital display
• Remote Westerlink digital display
• Remote start-and-stop panel
• Remote lubricating-oil filter kit
• Sound Guard SST
• Hydro-Hush muffler and fittings
• Fuel-water separator
• Anti-siphon valve with stainless-steel loop
• Ship-to-shore transfer switch
• Power take-off adapter
• Onboard spare-parts kit
• Extended-cruising spare-parts kit
• Technical manual
• Optional white generator finish

Availability of legacy accessories should be confirmed before the order is finalised.

Frequently Asked Questions

Is the Westerbeke 6.5 EDT D-NET 6.5 still manufactured?

No. Westerbeke currently identifies the 6.5 EDT D-NET as an older model that is no longer in production. Parts and technical documentation remain available.

How much electrical power does it produce?

The generator produces 6.5 kW at 60 Hz and 1800 RPM. The standard single-phase configuration supplies 120/240V at 54.1/27.0 amps.

Does the 6.5 EDT D-NET 6.5 support NMEA 2000?

The model was available with optional NMEA 2000-compliant databus communication. Some units may instead use Westerlink, so the installed control configuration should be checked.

Is it electronically governed?

Yes. Electronic governing helps maintain 1800 RPM and stable 60 Hz frequency as the connected electrical load changes.

Is the engine freshwater cooled?

Yes. The engine uses freshwater cooling with a shell-and-tube heat exchanger and a freshwater-cooled exhaust manifold.

Is a sound enclosure available?

The generator was offered with the Sound Guard SST, part number 52709. Availability of a new enclosure or replacement panels should be confirmed.

Can it replace another 6–7 kW marine generator?

Potentially, provided the voltage, frequency, electrical output, dimensions, weight, mounting arrangement, cooling, exhaust, fuel, control, and vessel wiring are compatible. 6.5 EDT D-NET 6.5

Request Availability and Pricing

The Westerbeke 6.5 EDT D-NET 6.5 kW 60 Hz marine diesel generator offers low-speed 1800 RPM operation, electronic governing, digital diagnostics, a three-cylinder diesel engine, freshwater cooling, a brushless four-pole alternator, and optional NMEA 2000 integration.

Because this model is no longer in production, customers should request confirmation of the unit’s condition, serial number, production date, control configuration, included accessories, warranty status, and parts availability before purchasing.

Contact our marine generator specialists to check the latest Westerbeke 6.5 EDT D-NET 6.5 price, available inventory, shipping options, and compatibility with your vessel.