Cummins Onan Marine QD 21.5MDKDR-8112A

Cummins QD 22.5MDKDT-8207A

$16,800.00
In Stock
In Stock
Add to wishlist
Category:
Brand:

Description

Need steady three-phase current for commercial shipboard loads? Select the Cummins QD 22.5MDKDT-8207A Marine Generator. Operating at 1,500 RPM, this 3.3-liter four-cylinder diesel gen-set outputs 22.5 kW continuous three-phase power. It delivers balanced 400-volt alternating current to support industrial water chillers, high-pressure deck winches, commercial galleys, and navigation electronics across demanding sea passages.

Compacted gray 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-8207A

Commercial mariners buy Cummins QD 22.5MDKDT-8207A generator packages to achieve dependable three-phase power inside large working hulls. This 50 Hz power unit outputs balanced 400-volt alternating current to eliminate phase imbalances across heavy machinery spaces.

  • 22.5 kW continuous 400-volt three-phase output supports heavy induction motor starts without voltage sag.
  • Four-pole brushless alternator design uses solid-state regulation to hold line voltage variation within one percent.
  • Heavy sound attenuation housing suppresses internal combustion noise down to 65 decibels at one meter.
  • 22.5MDKDT-8207A marine generator electronic governor maintains precise 50 Hz frequency under sudden electrical step loads.
  • Cupronickel tube-and-shell heat exchanger prevents raw seawater from contacting internal cast iron water jackets.
  • Automatic engine protection network halts operation upon detection of high exhaust heat or low oil pressure.
  • Starboard maintenance layout clusters oil filters, fuel filters, and water pump behind one panel.

Three Phase Alternator Output Verification

Turning at a governed 1,500 RPM, this four-stroke diesel delivers clean 50 Hz electrical power across marine switchboards. Continuous three-phase output yields 22.5 kW (28.1 kVA at 0.8 power factor) across 400-volt circuits. Fuel burn records 1.55 gallons per hour at half load and 2.75 gallons per hour at full continuous rating. Pressurized internal lubrication galleries sustain 40 to 65 PSI hot oil pressure, shielding critical crankshaft and camshaft journals from friction during non-stop offshore commercial operations.

Sound Shield Hull Clearance Boundaries

The sound shield capsule measures 49.3 inches long, 24.5 inches wide, and 27.2 inches high, dropping between structural inboard stringers. Four captive rubber isolators prevent mechanical vibration transmission to hull frames. A 2.5-inch water-cooled wet exhaust mixer drops cooled gases overboard, requiring six inches of starboard clearance for technician access.

Diesel Generator Service Maintenance Rules

Purge air from fuel injection passages using the manual primer arm before engaging the electric starter. Fill freshwater cooling loops with approved marine coolant to prevent localized hot spots. This unit is not engineered for dry land exhaust operation, raw sea water block circulation, or unventilated bilge spaces.

  • Drain factory break-in lube oil and install fresh filter elements after the first 50 operating hours.
  • Inspect flexible raw water pump impellers and drain fuel sediment bowls every 250 running hours.
  • Clean cupronickel heat exchanger tubes and replace sacrificial zinc anode plugs every 12 months.

Marine Warranty Pack Manifest

Cummins Onan supports this generator with a 24-Month / 2,000-Hour limited commercial marine warranty. The wooden freight crate contains the complete generator unit, sound attenuation enclosure, remote digital control panel, flexible fuel line kit, factory load test printout, and technical operator service documentation binder.

The Cummins Onan Marine QD 22.5MDKDT-8207A marine generator is designed to provide consistent electrical power for vessels operating in demanding marine environments. It delivers stable output for onboard systems, ensuring that essential equipment functions smoothly during both short trips and extended voyages.

This marine diesel generator is part of the Quiet Diesel (QD) series, known for reduced noise levels and efficient performance. It is built for marine operators who require dependable onboard electricity without excessive vibration or disruption.

Manufactured by Cummins Onan, this generator reflects a strong reputation for reliability and precision engineering in marine power systems.

Where This Generator Works Best

The Cummins Onan Marine QD 22.5MDKDT-8207A marine generator is suitable for a wide range of marine vessels that require steady electrical power.

It is commonly used in:

  • Luxury yachts
  • Offshore cruising vessels
  • Commercial marine vessels
  • Fishing boats
  • Passenger and charter boats

This marine diesel generator supports critical onboard systems such as lighting, navigation equipment, HVAC systems, and electronic devices. It ensures that power is consistently available, even during long offshore operations.

Its design allows for efficient integration into various vessel configurations, making it a versatile solution for different marine applications.

Built for Marine Durability and Quiet Operation

Marine generators must operate reliably under harsh conditions, and the Cummins Onan marine generator is engineered to meet those demands.

Key features include:

  • Marine-grade construction for corrosion resistance
  • Advanced sound shielding for quieter operation
  • Efficient cooling system for temperature control
  • Durable internal components for continuous use

The Quiet Diesel technology reduces noise and vibration, making it suitable for vessels where comfort is important. This is especially beneficial for passenger vessels and yachts where onboard experience matters.

This marine diesel generator is built to deliver long-term performance with minimal operational disruption.

What Makes This Generator a Smart Choice

The Cummins Onan Marine QD 22.5MDKDT-8207A marine generator stands out for its balance of power, efficiency, and quiet operation.

Key advantages include:

  • Reliable electrical output for essential systems
  • Quiet operation for improved onboard comfort
  • Fuel-efficient diesel performance
  • Durable design for long-term use
  • Suitable for both recreational and commercial vessels

This Cummins Onan marine generator is designed to meet the needs of operators who require consistent and dependable onboard power.

Who This Generator Is Best For

The Cummins Onan Marine QD 22.5MDKDT-8207A marine generator is ideal for users who need reliable electrical power at sea.

It is best suited for:

  • Yacht owners requiring quiet onboard power
  • Commercial operators running daily marine activities
  • Offshore vessel operators
  • Charter service providers
  • Marine professionals managing large vessels

This marine diesel generator is particularly valuable for those who depend on stable electrical systems during extended operations.

Key Specifications Explained Simply

The Cummins Onan Marine QD 22.5MDKDT-8207A marine generator delivers approximately 22.5 kW of electrical power, making it suitable for vessels with high onboard energy demands.

It operates on diesel fuel, providing efficient and reliable performance over extended periods. The generator is designed with advanced sound insulation, reducing noise levels and improving onboard comfort.

Its construction includes marine-grade materials that resist corrosion and withstand harsh environmental conditions. The cooling system ensures consistent performance, even during prolonged use.

This marine generator system is built to provide stable and efficient power for modern marine applications.

Buying with Confidence

Choosing the Cummins Onan Marine QD 22.5MDKDT-8207A marine generator means selecting a dependable onboard power solution.

This marine diesel generator is suitable for both recreational and commercial vessels, offering flexibility across different marine applications. Buyers can also explore related marine generators within the same category to compare power capacities and find the best fit for their vessel.

Selecting the right generator ensures reliable onboard systems and long-term operational efficiency.

Frequently Asked Questions

What type of vessels can use this generator

The Cummins Onan Marine QD 22.5MDKDT-8207A marine generator is suitable for yachts, commercial vessels, and offshore boats requiring reliable onboard power.

How much power does this generator produce

This marine diesel generator delivers approximately 22.5 kW, making it suitable for high-demand onboard systems.

Is this generator quiet during operation

Yes, it is part of the Quiet Diesel series, designed to reduce noise and vibration for improved onboard comfort.

Can it be used for commercial marine operations

Yes, the Cummins Onan marine generator is suitable for both recreational and commercial applications.

Is it fuel efficient

Yes, diesel-powered generators are designed for better fuel efficiency and long operational life compared to gasoline alternatives.

The generator is controlled by a proven control system that also monitors the operation of all essential functions. In the event of any problems, the system automatically shuts down the unit to prevent damage and also provides diagnostics for easy and quick troubleshooting.

All models are equipped with an electronic control system that monitors the operation of the unit, including automatic shutdown for:

  • high cooling water temperature
  • high exhaust temperature
  • low oil pressure
  • poor cooling water flow
  • overspeed
  • long start time
  • low/high AC voltage
  • low/high AC frequency

Generators in local stock can usually be shipped or picked up the next business day. Delivery time for generators in main stock is approximately 10 days from order.

We reserve the right to any errors and price changes.

Reviews

There are no reviews yet.

Be the first to review “Cummins QD 22.5MDKDT-8207A”