Cummins Onan Marine QD 22.5MDKDT-8206A

Cummins QD 22.5MDKDT-8206A

$16,920.00
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Description

During continuous offshore ocean passages, the Cummins QD 22.5MDKDT-8206A Marine Generator produces 22.5 kW continuous single-phase current at 1,500 RPM. Powered by an unstressed 3.3-liter four-cylinder diesel engine, this 50 Hz power unit energizes extensive whole-ship air conditioning networks, galley induction equipment, and deep-freeze refrigeration without light flicker or harmonic distortion.

Thick-wall cast iron block metallurgy isolates reciprocating drone from vessel accommodation bulkheads. The crank train combines a heat-treated forged alloy crankshaft, forged steel connecting rods, and oil-cooled aluminum pistons. Engine geometry measures a 98 mm cylinder bore, 110 mm stroke, 21:1 compression ratio, 11.5-quart oil sump capacity, and dry net weight of 1,120 lbs inside its sound shield. Splayed main bearing caps reinforce lower case rigidity under heavy loads.

Key Features of Cummins QD 22.5MDKDT-8206A

Superyacht builders buy Cummins QD 22.5MDKDT-8206A generator systems to provide massive single-phase electrical capacity inside medium-displacement vessels. The high-displacement block delivers unwavering torque reserves to handle heavy compressor starts without stalling.

  • 22.5 kW continuous 230-volt single-phase output maintains heavy vessel electrical grids without alternator overheating.
  • High-capacity brushless four-pole alternator uses digital regulation to hold voltage stability within one percent.
  • Sealed acoustic housing keeps machinery noise restricted to 65 decibels inside adjoining accommodation spaces.
  • 22.5MDKDT-8206A marine generator electronic monitoring system triggers immediate engine shutdown upon fault detection.
  • Oversized cupronickel heat exchanger maintains low engine coolant temperatures during full-load summer runs.
  • Water-cooled cast iron exhaust elbow isolates heat radiation from composite fiberglass engine beds.
  • Central service layout places dipsticks, oil filters, and the sea water pump behind one quick-release door.

Electrical Power Dynamic Verification

Turning at a steady 1,500 RPM, this four-stroke diesel delivers clean 50 Hz power across marine distribution panels. Continuous single-phase output yields 22.5 kW and 97.8 amps at 230 volts. Fuel burn averages 1.55 gallons per hour at 50 percent load and 2.75 gallons per hour at full continuous output. Lubrication galleries sustain 40 to 65 PSI hot pressure, keeping rod bearings protected under round-the-clock service during rough offshore navigation.

Engine Bed Machinery Clearances

Outer dimensions measure 49.3 inches long, 24.5 inches wide, and 27.2 inches high within its heavy sound enclosure. Four captive marine mounts detach engine harmonics from stringer frames. The 2.5-inch wet exhaust fitting requires direct fall to waterlock silencers, and side panels require six inches of technician working room.

Mandatory Service Protocol Safeguards

Vent the fuel injection circuit using the manual primer lever prior to first ignition. Fill the jacket freshwater loop to maximum levels to eliminate trapped air pockets. This generator package is not engineered for raw sea water block circulation, unvented bilges, or dry land installations.

  • Drain factory break-in engine oil and renew oil filter elements after the first 50 operating hours.
  • Inspect flexible raw water pump impellers and change primary fuel filter canisters every 250 operating hours.
  • Clean heat exchanger raw water tubes and thread in fresh zinc sacrificial anodes every 12 months.

Factory Warranty Crate Inventory

Cummins Onan covers this power plant with a 24-Month / 2,000-Hour limited marine manufacturer warranty. The heavy freight crate includes the complete generator unit, sound isolation enclosure, digital remote display station, vibration isolator pads, certified load bank test sheets, and technical operator maintenance manuals.

Overview

The Cummins Onan Marine QD 22.5MDKDT-8206A is designed for vessels requiring substantial onboard power capacity without compromising comfort, reliability, or efficiency. Built on Cummins Onan’s proven Quiet Diesel platform, this generator provides stable electrical output for a wide range of onboard systems while maintaining quiet and dependable operation.

Producing 22.5 kW of electrical power, the generator is suitable for larger vessels equipped with air conditioning systems, refrigeration units, navigation electronics, communication systems, watermakers, and other power-intensive equipment.

Its advanced electronic management system continuously monitors critical operating parameters, helping maximize uptime while protecting the generator from potentially damaging conditions.

Applications and Vessel Compatibility

The Cummins Onan QD 22.5MDKDT-8206A Marine Generator is suitable for numerous marine applications.

Common vessel types include:

  • Luxury motor yachts
  • Superyacht tenders
  • Sportfishing vessels
  • Offshore cruisers
  • Catamarans
  • Commercial workboats
  • Passenger vessels
  • Patrol boats
  • Offshore support vessels
  • Long-range cruising yachts

The generator’s high output capacity allows it to power multiple onboard systems simultaneously while maintaining stable and reliable electrical performance.

Its robust design makes it equally suitable for recreational and commercial marine operations.

Quiet Diesel Technology

The Cummins Onan Quiet Diesel Series is widely recognized for delivering reliable power with reduced noise levels.

The QD 22.5MDKDT-8206A benefits from advanced engineering designed to minimize sound and vibration during operation.

Advantages include:

  • Lower operating noise
  • Reduced vibration
  • Improved onboard comfort
  • Better passenger experience
  • Suitable for overnight use
  • Enhanced cruising enjoyment

The generator’s 1500 RPM operating speed further contributes to quiet performance and reduced mechanical stress, helping improve both comfort and longevity.

This makes it an ideal solution for premium yacht installations and comfort-focused marine applications.

Advanced Electronic Control System

The Cummins Onan Marine QD 22.5MDKDT-8206A features a sophisticated electronic control platform that continuously monitors generator operation.

The control system provides:

  • Real-time monitoring
  • Automatic safety protection
  • Integrated fault diagnostics
  • Operational status information
  • System performance tracking
  • Simplified troubleshooting

This intelligent management system helps ensure reliable operation while providing operators and technicians with valuable diagnostic information.

By continuously monitoring essential functions, the generator can quickly respond to abnormal operating conditions.

Automatic Protection and Shutdown Systems

The QD 22.5MDKDT-8206A incorporates comprehensive protection systems designed to safeguard critical generator components.

The generator automatically monitors and protects against:

  • High cooling water temperature
  • High exhaust temperature
  • Low oil pressure
  • Poor cooling water flow
  • Overspeed conditions
  • Excessive start duration
  • Low AC voltage
  • High AC voltage
  • Low AC frequency
  • High AC frequency

When abnormal conditions are detected, the generator automatically shuts down to prevent equipment damage.

This protection strategy helps maximize generator life while reducing repair costs and unexpected downtime.

Integrated Diagnostic Capabilities

The built-in diagnostic system simplifies generator maintenance and troubleshooting.

Benefits include:

  • Rapid fault identification
  • Reduced downtime
  • Faster repairs
  • Improved service efficiency
  • Enhanced operational reliability
  • Simplified maintenance planning

The generator provides valuable diagnostic information that helps operators and service technicians quickly identify and resolve issues.

For vessel owners and fleet operators, these capabilities contribute to greater confidence and reduced operational interruptions.

Reliable Marine Power Generation

Modern marine vessels rely on dependable electrical systems for both comfort and safety.

The Cummins Onan QD 22.5MDKDT-8206A is designed to support a broad range of onboard equipment including:

  • Air conditioning systems
  • Refrigeration units
  • Navigation electronics
  • Communication systems
  • Battery charging equipment
  • Watermakers
  • Lighting systems
  • Entertainment systems
  • Galley appliances
  • Auxiliary marine equipment

Its stable electrical output helps ensure the reliable operation of sensitive onboard systems during both short trips and extended voyages.

Durability and Long-Term Reliability

The Cummins Onan Marine Generator Series is engineered for long-term operation in demanding marine environments.

Key durability advantages include:

  • Marine-grade construction
  • Proven diesel technology
  • Comprehensive protection systems
  • Advanced cooling management
  • Reliable electrical components
  • Long service intervals

The combination of 1500 RPM operation, advanced monitoring systems, and Cummins engineering contributes to exceptional reliability and service life.

These characteristics make the QD series one of the most trusted marine generator platforms available.

Technical Specifications

The Cummins Onan Marine QD 22.5MDKDT-8206A is a 22.5 kW marine diesel generator operating at 1500 RPM. The generator is configured for 50 Hz electrical output and utilizes a 12-volt electrical system.

Advanced electronic controls continuously monitor critical operating functions and provide automatic shutdown protection for conditions including excessive temperature, low oil pressure, abnormal voltage, frequency irregularities, cooling water flow issues, overspeed conditions, and prolonged starting attempts.

Integrated diagnostics assist with maintenance and troubleshooting while supporting reliable marine power generation for demanding onboard electrical systems.

Product Support and Parts Availability

Owners of the Cummins Onan Marine QD 22.5MDKDT-8206A benefit from access to technical support, maintenance resources, service documentation, diagnostic assistance, and genuine replacement parts availability.

Cummins’ global support network helps ensure dependable operation and professional service support throughout the generator’s operational life.

Customers can also explore related marine generators, onboard power systems, marine electrical equipment, and energy management solutions to support complete vessel electrical installations.

Frequently Asked Questions

How much power does the Cummins Onan QD 22.5MDKDT-8206A produce

The generator delivers 22.5 kW of electrical power, making it suitable for larger yachts and commercial vessels with significant onboard electrical requirements.

What operating speed does the generator use

The QD 22.5MDKDT operates at 1500 RPM, helping reduce noise, vibration, and mechanical wear.

Is the generator suitable for yachts

Yes. The generator is widely used in luxury yachts, sportfishing vessels, cruisers, and commercial marine applications.

What protection systems are included

The generator monitors temperature, oil pressure, cooling water flow, engine speed, AC voltage, AC frequency, and starting performance.

Does the generator provide diagnostics

Yes. Integrated diagnostics help simplify troubleshooting and maintenance procedures.

What frequency does the generator provide

The generator is configured for 50 Hz operation.

Why choose the Cummins Onan Marine QD 22.5MDKDT-8206A

Its combination of 22.5kW output, 1500 RPM quiet operation, advanced diagnostics, automatic protection systems, and Cummins reliability makes it an excellent marine power generation solution.

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