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Note: Scheduled delivery services are available to most of the contiguous United States (available in parts of Alaska and Hawaii). Call 888-228-5800 for more information.
Discontinued Product

Generac Guardian Series Air Cooled Gas Engine Generator - 005873-0

Abt Model: 5873 | UPC Code: 696471058734
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This product is no longer available.

Product Details

Generac Guardian Series Air Cooled Gas Engine Generator - 5873

Provides essential circuit power protection for your home, ensuring the necessities remain powered during an outage or up to whole house coverage when paired with one of Generac’s load shedding devices. Capable of backing up a five ton air conditioner.

Key Features:

  • Generac's Nexus™ Controller is the most comprehensive available. The dual line, tri-lingual LCD display allows for easy monitoring and management of generator functions.
  • Simple field conversion from natural gas to LP.
  • Generac’s OHVI® engine was designed specifically for generators. It outperforms most competitive generator engines with an engine life that is three to four times longer and has a significantly longer period between scheduled maintenance checkups.
  • TruePower™ Technology provides clean, smooth operation of sensitive electronics and appliances.
  • Choose from premium all-weather aluminum or sturdy galvanneal steel enclosures for superior protection against the elements, modeled to withstand 150 mph winds.
  • QuietTest™ Mode for a weekly self-test that runs quieter than other brands.
  • External "At-a-Glance" indicator lights offer an easy way to tell generator status without opening the generator enclosure.
  • Added Sound Reduction with enclosures that are lined with sound reducing foam panels for further noise reduction.
  • Hour Meter monitors run time, providing information to determine maintenance intervals.
  • Easiest installation on the market and an excellent value when purchased pre-packaged with a pre-wired transfer switch, or customize your system by purchasing the generator and transfer switch separately



  • Generac (OHVI) Design Maximizes engine "breathing" for increased fuel efficiency. Plateau honed cylinder walls and plasma moly rings help engine run cooler, reducing oil consumption. Because heat is the primary cause of engine wear, the OHVI has a significantly longer life than competitive engines.
  • "Spiny-lok" cast iron cylinder walls Rigid construction and added durability provide long engine life.
  • Electronic ignition/spark advance These features combine to assure smooth, quick starting every time.
  • Full pressure lubrication system Superior lubrication to all vital bearings means better performance, less maintenance and significantly longer engine life. Now featuring a 2 year/200 hour oil change interval.
  • Low oil pressure shutdown system Superior shutdown protection prevents catastrophic engine damage due to low oil.
  • High temperature shutdown Prevents damage due to overheating.


  • Revolving field: Allows for smaller, light weight unit that operates 25% more efficiently than a revolving armature generator.
  • Skewed stator: Produces a smooth output waveform for compatibility with electronic equipment.
  • Displaced phase excitation: Maximizes motor starting capability.
  • Automatic voltage regulation: Regulates the output voltage to ±1% prevents damaging voltage spikes.
  • UL 2200 Listed: For your safety


  • •Fully Automatic: Transfers your vital electrical loads to the energized source of power.
  • •Pre-wired, color coded conduits: Ensures the easiest, trouble free installation.
  • •Remote Mounting: Mounts near your existing distribution panel for simple, low cost installation
  • •UL Listed: . For your safety


  • Manual/Auto/Off switch: Selects the operating mode.
  • Utility voltage sensing: Constantly monitors utility voltage, setpoints 65% dropout, 75% pick-up, of standard voltage.
  • Generator voltage sensing: Constantly monitors generator voltage to ensure the cleanest power delivered to the home.
  • Utility interrupt delay: Prevents nuisance start-ups of the engine, setpoint approximately 10 seconds.
  • Engine warm-up: Ensures engine is ready to assume the load, setpoint approximately 10 seconds.
  • Engine cool-down: Allows engine to cool prior to shutdown, setpoint approximately 1 minute.
  • Programmable seven day exerciser: Operates engine to prevent oil seal drying and damage between power outages by running the generator for 12 minutes every week.
  • Smart battery charger: Delivers charge to the battery only when needed at varying rates depending on outdoor air temperature.
  • Main Line Circuit Breaker: Protects generator from overload.
  • Electronic governor: Maintains constant 60 Hz frequency.


  • Weather protective enclosure: Ensures protection against mother nature. Hinged key locking roof panel for security. Lift-out front for easy access to all routine maintenance items. Electrostatically applied textured epoxy paint for added durability.
  • Enclosed critical grade muffler: Quiet, critical grade muffler is mounted inside the unit to prevent injuries.
  • Small, compact, attractive: Makes for an easy, eye appealing installation.


  • Pre-wired External Connection Box
  • 1' Flexible Fuel Line Connector
  • Pre-wired conduits
  • UL Listed wire nuts
    • Easy Installation - Virtually all hardware included, plus step-by-step photographed Installation Guide.

EZ Transfer Switch

  • Electrically operated, mechanically-held contacts for fast, positive connections.
  • Rated for all classes of load, 100% equipment rated, both inductive and resistive.
  • 2 pole, 250 VAC contactors.
  • 160 millisecond transfer time.
  • Dual coil design.
  • Main contacts are silver plated or silver alloy to resist welding and sticking.
  • NEMA 1 (indoor rated) enclosure is standard on the 100 amp switch.
  • Pre-wired 30 foot whip to connect to the pre-wired external connection box.
  • Pre-wired 2 foot whip, color coded to connect into the existing electrical panel.

Package Content:

  • True Power® Electrical Technology
  • Two Line LCD Tri-lingual Digital Nexus Controller
  • 16 Circuit EZ Automatic Transfer Switch with Built-In Priority Load Center
  • Electronic Governor
  • Pre-wired External Connection Box
  • External Main Circuit Breaker, System Status & Maintenance Interval LED Indicators and GFCI Duplex Outlet
  • Flexible Fuel Line Connector
  • Pre-wired conduits
  • Natural Gas or LP Gas Operation
  • UL 2200 Listed



  • Rated Maximum Continuous Power Capacity (LP) 17,000 Watts*
  • Rated Maximum Continuous Power Capacity (NG) 16,000 Watts*
  • Rated Voltage 120/240 120/240
  • Rated Maximum Continuous Load Current – 240 Volts 70.8 LP/66.6 NG
  • Total Harmonic Distortion Less than 5%
  • Main Line Circuit Breaker 65 Amp
  • Phase 1
  • Number of Rotor Poles 2
  • Rated AC Frequency 60Hz
  • Power Factor 1
  • Battery Requirement (not included) Group 26R 12 Volts and 525 Cold-cranking Amperes Minimum
  • Sound output in dB(A) at 23 ft. with generator operating at normal load 66
  • Sound output in dB(A) at 23 ft. with generator in Quiet-Test™ low speed exercise mode 60


  • Type of Engine GENERAC OHVI V-TWIN
  • Number of Cylinders 2
  • Displacement 992cc
  • Cylinder Block Aluminum w/Cast Iron Sleeve
  • Valve Arrangement Overhead Valve
  • Ignition System Solid-state w/Magneto
  • Governor System Electronic
  • Compression Ratio 9.5:1
  • Starter 12 Vdc
  • Oil Capacity Including Filter Approx. 1.9 Qts./1.8L
  • Operating RPM 3,600
  • Fuel Consumption
    • Natural Gas cu.ft./hr.
      • 1/2 Load 183
      • Full Load 261
    • Liquid Propane ft3/hr (gal/hr)
      • 1/2 Load 59 (1.61)
      • Full Load 94 (2.57)
  • Required fuel pressure to generator fuel inlet at all load ranges - 5 to 7 inches of water column for natural gas, 10 to 12 inches of water column for LP gas


  • 2-Line Plain Text LCD Display Simple user interface for ease of operation
  • Mode Switch
    • Auto Automatic Start on Utility failure. 7 day exerciser
    • Off Stops unit. Power is removed. Control and charger still operate.
    • Manual/Test (start) Start with starter control, unit stays on. If utility fails, transfer to load takes place.
  • Programmable start delay between 10-30 seconds Standard
  • Engine Start Sequence Cyclic cranking: 16 sec. on, 7 rest (90 sec. maximum duration)
  • Engine Warm-up 10 seconds
  • Engine Cool-Down 1 minute Starter Lock-out
  • Starter cannot re-engage until 5 sec. after engine has stopped.
  • Smart Battery Charger Standard
  • Automatic Voltage Regulation with Over and Under Voltage Protection Standard
  • Automatic Low Oil Pressure Shutdown Standard
  • Overspeed Shutdown Standard, 72Hz
  • High Temperature Shutdown Standard
  • Overcrank Protection Standard
  • Safety Fuse Standard
  • Failure to Transfer Protection Standard
  • Low Battery Protection Standard
  • 50 Event Run Log Standard
  • Future Set Capable Exerciser Standard
  • Incorrect Wiring Protection Standard
  • Internal Fault Protection Standard
  • Common External Fault Capability Standard


  • No. of Poles 2
  • Current Rating (amps) 100
  • Voltage Rating (VAC) 250
  • Utility Voltage Monitor (fixed)
    • Pick-up 75%
    • Dropout 65%
  • Return to Utility approx. 15 sec.
  • Exerciser weekly for 12 minutes Standard
  • UL Listed Standard
  • Total of Pre-wired Circuits 16
    • No. 15A 120V 5
    • No. 20A 120V 5
    • No. 20A 240V 1
    • No. 40A 240V 1
    • No. 50A 240V 1
  • Circuit Breaker Protected
    • Available RMS Symmetrical Fault Current @ 250 Volts 10,000

Approximate Dimensions:

Main Unit:

  • Length: 48"
  • Width: 25"
  • Height: 29"

EZ Transfer Switch and Load Center:

  • Depth: 7"
  • Width: 12.5"
  • Height:26.5"

Approximate Weight:

  • Unit: 455 lbs
  • Shipping: 485 lbs

Warranty Information:

  • Manufacturers Warranty(authorized online retailer):
    • 2 Years Parts and Labor
    • 3rd Year Parts Only
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Key Features
Dual Line, Tri-Lingual LCD Display Nexus Controller/ Simple Field Conversion/ OHVI Engine/ TruePower Technology/ QuietTest Mode/ Added Sound Reduction/ Hour Meter/ Bisque Finish
More reasons to buy the Generac 005873-0 from Abt Electronics
  • is an authorized dealer (Learn More).
  • The Generac 005873-0 is Brand New.
  • The Generac 005873-0 Ships in a Factory Sealed Box.
A/C Rated Output17000 Watts
Starting MethodAuto/Manual
Fuel Tank Capacity (Gal.)None
Height (inches)29"
Width (inches)25"
Depth (inches)48"
Warranty3 Years Parts and Labor
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