MDKBJ 7.5 kW Marine Generator, 60 Hz

MDKBJ 7.5 kW Marine Generator, 60 Hz

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MDKBJ 7.5 kW Marine Generator, 60 Hz

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CUMMINS ONAN 7.5 kW Marine Diesel Generator MDKBJ, 60 Hz, 1 phase, 120V, 2900 RPM. 3-cylinder, 4-stroke Kubota diesel. Digital Display provides user-friendly diagnostics, optimized mounting greatly reduces vibration. EPA & Lloyd's certified. Sound shield included. 5 year limited warranty.*


**Contact Us For Pricing On Marine Generators! 1-800-766-5256, [email protected] or chat with us below!

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Cummins Onan 7.5 kW Marine Diesel Generator - MDKBJ 

The Cummins Onan 7.5kW Marine Diesel Generator MDKBJ, part of Cummins Onan's digital QD (Quiet Diesel) series models, is the first marine generator with self-monitoring capability and network communication. The optional Cummins Onan Digital Display provides user-friendly self-diagnostic features and text display including extensive engine and alternator information.

Cummins Onan Marine Generators, with advanced design and development processes, use technology to lower sound and vibration. The sound shield (included) further minimizes noise. The optimized mounting system greatly reduces vibration.

The MDKBJ is certified to U.S. Environmental Protection Agency (EPA) emission standards. More than 90 years of marine experience stand behind every Cummins Onan Marine generator set, as well as the largest worldwide certified Distributor/Dealer support network in the industry. 

Onan 7.5 kW Marine Diesel Generator
Beneteau Swift Trawler completes the Great Loop, promotes cruising lifestyle,
with help from Cummins Onan MDKBJ 7.5kw marine generator.

Features of the MDKBJ

• Advanced digital electronic control providing extensive
diagnostic capability
• Shutdown with diagnostic indicator light for: high engine
coolant temperature, high exhaust temperature, low oil
pressure, over speed/voltage, starter overcrank, no raw
water flow, additional customer input and many more
• Start-run-stop switch with glow plug preheat and fuel
pump priming modes for easy starting; run light and
diagnostic indicator light
• Start function has automatic glow plug preheat for
cleaner starting
• Engine starter with automatic start disconnect
• Electronic governor allows the generator set to maintain
isochronous frequency control and close voltage
regulation to provide quality power for digital appliances
and computers
• Switchable between 50/60 Hz
• Front panel oil fill and level check
• Single phase AC alternator with single or dual voltages
• Digital voltage regulator integral with control
• 12 V DC electric system with battery charging, negative
ground and DC protective circuit breakers
• Electric fuel transfer pump for priming and lift capability
• Freshwater cooling system with heat exchanger,
expansion tank and coolant recovery system
• Water cooled exhaust mixing elbow
• AC mainline circuit breaker
• Running time meter
• Air intake silencer
• Mounting systems with vibration isolators
• Full flow lube oil filter
• Oil drain and hose extension
• Electric fuel shut-off via electronic governing actuator
• Fuel filter/water separator
• Drip pan base capable of containing all generator set fluids
• External mount tabs allow flexible mounting arrangement
• Bulk head type connections for ease of installation include
fuel in, fuel out, battery, raw water inlet, wet exhaust and
generator set ground (vessel bond)
• Integral enclosure for environmental protection from noise,
salt water, and moving parts
• Plug-in watertight connector for optional remote control
• Closed crankcase breather re-circulation to eliminate
engine room contamination
• Coolant overflow bottle for easy coolant level maintenance
• Fire extinguisher access port
• Factory load tested
• Five year limited warranty*

Specifications of the Onan 7.5 kW Marine Diesel Generator

Engine Model

3-cylinder, 4-stroke Kubota diesel


Cummins Onan model

Product Dimensions and Weight

Overall Length

mm (in)

664 (26)

Overall Width

mm (in)

583 (23)

Overall Height

mm (in)

535 (21)


kg (lb)

195 (429) 
















120 | 240


62.5 | 31.3



MDKBJ Generator Dimensions

*The Cummins Onan express, written limited warranty covers virtually everything except routine maintenance for the first two years you own your marine generator set, and covers parts and labor on major power train and generator set parts during the third through fifth years.



By on 16 Apr. 2018

class="review-name" itemprop="name">Onan

Big fan of lower speed, 3-cylinder generators, especially Onan. Quiet enough to leave it running all night on particularly hot nights, without bothering. Pricey, but well worth the money. My last Onan lasted me over 14 thousand hours, and expect the same from this one.

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