Cummins Onan MDKDR 21.5 kW Marine Generator

The 21.5 kW MDKDR, 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 optional sound shield further minimizes noise. The optimized mounting system greatly reduces vibration.

The MDKDR 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. 

Features of the MDKDR

• 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 providing
better, 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
• Single phase AC alternator with single or dual voltages,
brushless
• Digital voltage regulator integral with control
• 12 V DC electric system with battery charging, negative
ground
• Electric fuel transfer pump for priming and lift capability
• DC control console mounted with isolation and DC
protective circuit breakers
• Freshwater cooling system with heat exchanger, expansion
tank and coolant recovery system
• Water cooled exhaust mixing elbow
• Gear-driven raw water pump
• AC mainline circuit breaker
• Running time meter
• Air intake silencer
• Captive focalized 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
• Bulk head type connections for ease of installation include
fuel in, fuel out, battery, raw water inlet, wet exhaust,
generator set ground (vessel bond)
• Single point lifting bracket for ease of installation
• Plug-in watertight connector for optional remote control
• Closed crankcase breather re-circulation to eliminate
engine room contamination
• Coolant overflow bottle to easily maintain coolant level
• Fire extinguisher access port
• Factory load tested
• Five year limited warranty

Specifications