Athearn Genesis 12337 Southern Pacific SP F7AB #6382/6295 DC HO

Athearn Genesis

MSRP: $379.98
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Detailed Information


  • First time with all-new LED lighting
  • 1st time sound version offered
  • 1st time with late era nose and eyebrow grabs plus nose mounted MU receptical
  • Rubber MU hoses for durability


  • Last Rio Grande F units in service
  • Operated on Rio Grande Zephyr and Ski Train
  • B-units equipped with steam generators
  • Ladder grabs mounted on the roof
  • Spark arrestors on 5771 & 5762. Standard exhaust stacks on 5774 & 5772
  • Nose MU receptacle on 5771


  • 3rd unit of Rio Grande Zephyr F9 set
  • Steam Generator
  • Spark Arrestors
  • Ladder grab mounted on roof


  • Freight units without steam generators
  • 36” dynamic brake fan
  • Hostler “backup” light on blind ends
  • Ladder rest grabs


  • “Eyebrow” grabs
  • Dual single-chime horns
  • Kick plates
  • Rear roof corner grab
  • Emergency “Big Hole” light; activated when E-stop button is pressed on DCC+Sound version only.


September 1958 with the publication of SP's "Bulletin" company magazine began the "New look for Our Trains", indoctrinating the scarlet and grey colors. Some details were still being refined as a few locomotives would be adorned with the sans-serif style lettering on the hood.


  • As depicted on the cover of the SP "Bulletin" September 1958

#6382, #8295 F7A & B-UNIT SETS

  • First time in Genesis: 1958-painted Grey & Scarlet with Gothic style lettering
  • B unit equipped with steam generator
  • 3 or 5 chime horn as appropriate
  • SP features upper gyralight & lower headlight, cut skirts


  • Nose door without light, full skirts


  • Spark Arrestors
  • Winterization hatch
  • Dual lights with upper gyralight (effect on DCC+Sound version only)
  • Single chime or 3-chime horns as appropriate
  • Additional grab irons on engineer’s side of nose
  • Nose MU receptacle


  • 1970 BN merger renumbering, with faded paint colors per prototypes
  • Single or 3-chime horns as appropriate
  • Additional grab irons on engineer’s side of nose
  • Headlights replaced with dual sealed-beam lights top and bottom. (Gyralight effect on DCC+Sound version only)


  • All units are powered
  • Factory installed SoundTraxx Tsunami2 sound and DCC decoder (DCC+sound units only)
  • DCC+Sound models are “dual mode” and will operate under both DCC and DC
  • Directional constant lighting; headlight brightness remains constant
  • On DCC-ready B-units, back-up lights or marker lights (if equipped) will come with LEDS, but wires will not be connected to the circuit board.
  • Scaled from prototype resources including drawings, field measurements, photographs, and more
  • Fully-assembled and ready-to-run
  • Accurately-painted and printed paint schemes
  • Separately applied photo etched metal and injection molded detail parts
  • Cab interior
  • Coupler cut levers
  • MU hoses
  • Trainline hose
  • Windshield wipers
  • Lift rings
  • Wire grab irons
  • Detailed fuel tank with fuel fillers, fuel gauges, breather pipes, and retention tanks
  • Sander lines
  • Body mounted McHenry scale knuckle couplers - Kadee compatible
  • DCC-ready Non-sound version features 21-pin NEM DCC plug
  • Genesis driveline with 5-pole skew wound motor, precision machined flywheels, and multi-link drivetrain for trouble free operation
  • All-wheel drive with precision gears for smooth and quiet operation
  • All-wheel electrical pickup provides reliable current flow
  • Wheels with RP25 contours operate on all popular brands of track
  • LEDs for realistic appearance
  • Blomberg-B trucks
  • Heavy die-cast frame for greater traction and more pulling power
  • Packaging securely holds for the model for safe storage
  • Replacement parts available
  • Minimum radius: 18”


  • Onboard DCC decoder with SoundTraxx Tsunami2 decoder pre-installed
  • Sound units operate in both DC and DCC
  • Individual sound boards installed in both A and B units (sound units only)
  • Engine, horn, and bell sounds work in DC
  • Some functions are limited in DC
  • All functions NMRA compatible in DCC mode
  • Excellent low-speed operation
  • Program a multiple unit (MU) lashup with lead unit only horn, bell, and lights
  • Lighting effects such as beacons, Gyralight where prototypically accurate
  • Many functions can be altered via Configuration Value (CV) changes
  • CV chart included in the box 


EMD F-units were a line of diesel-electric locomotives produced between November 1939 and November 1960 by General Motors Electro-Motive Division and General Motors-Diesel Division. Final assembly for all F-units was at the GM-EMD plant at La Grange, Illinois and the GMDD plant in London, Ontario, Canada. They were sold to railroads throughout the United States, Canada, and Mexico. 

Structurally, the locomotive was a carbody unit, with the body as the main load-bearing structure, designed like a bridge truss and covered with cosmetic panels. The so-called bulldog nose was a distinguishing feature of the locomotive’s appearance, and made a lasting impression in the mind of the traveling public.

The F-units were the most successful “first generation” road (main line) diesel locomotives in North America, and were largely responsible for superseding steam locomotives in road freight service. Before this, diesel units were mostly only built as switcher locomotives, and only used in rail yards.

F-units were sometimes known as “covered wagons”, due to the similarity in appearance of the roof of an F-unit to the canvas roof of a Conestoga wagon, an animal-drawn wagon used in the westward expansion of the United States during the late 18th and 19th centuries. When a train’s locomotive consist included only F-units, the train would then be called a wagon train. These two usages are still popular with the railfan community.

This page is based on the copyrighted Wikipedia article "EMD F-unit"; it is used under the Creative Commons Attribution-ShareAlike 3.0 Unported License (CC-BY-SA You may redistribute it, verbatim or modified, providing that you comply with the terms of the CC-BY-SA.


DCC: Ready/21-Pin NEM
SOUND: Ready
Axles: 4
Minimum Age Recommendation: 14 years
Is Assembly Required: No