Bring home CSX's blue and yellow heritage in O Scale with the MTH Premier 20219711 Dash-8 Diesel Engine #7690, complete with Proto-Sound 3.0 for lifelike operation on your layout. This Hi-Rail model captures every rivet and grille of the prototype that powered CSX's high-horsepower mainline freight service, while PS3 delivers digital sound, smoke, speed control, and full DCC/DCS command compatibility straight out of the box.
Key Features
- Proto-Sound 3.0 with digitally recorded GE 4-stroke diesel prime mover, realistic horn, and bell
- Operates on O gauge track — runs on a minimum O-54 curve, Hi-Rail wheels for 3-rail layouts
- Full DCS, DCC, and conventional AC control compatibility
- Intricately detailed ABS body with die-cast truck sides, pilots, and fuel tank
- Metal chassis, metal handrails, and metal horn
- Moveable roof fans and metal body-side grilles
- Detachable snow plow and two hand-painted engineer cab figures
- Rule 17 directional LED headlights, illuminated number boards, and lighted cab interior
- Two remote-controlled Proto-Couplers plus O Scale Kadee-compatible coupler mounting pads
- Authentic CSX dark blue and yellow paint scheme with road number 7690
Specifications
| Brand |
MTH Premier |
| Item Number |
20-21971-1 |
| Scale |
O Scale (Hi-Rail / 3-Rail) |
| Road Name |
CSX Transportation |
| Road Number |
7690 |
| Locomotive Type |
GE Dash-8 Diesel |
| Sound / Electronics |
Proto-Sound 3.0 (DCS / DCC / Conventional AC) |
| Minimum Curve |
O-54 |
| Era |
Modern |
| Couplers |
Two operating Proto-Couplers + Kadee-compatible mounting pads |
| Lighting |
Rule 17 directional LED headlights, illuminated number boards, lighted cab |
| Includes |
Snow plow, two engineer figures, owner's manual, detail parts |
FAQ
Does this locomotive run on conventional AC power or does it require DCS?
Proto-Sound 3.0 is fully compatible with conventional AC transformers, MTH DCS, and DCC command systems — run it the way your layout is set up today.
What minimum curve does it need?
The Premier Dash-8 is rated for O-54 minimum curves, making it a good fit for mid-size and larger 3-rail layouts.
Is this Hi-Rail or Scale wheel?
This #7690 release uses Hi-Rail wheels for 3-rail O gauge track. If you need scale wheels, look for the separate 2-rail scale-wheel version.
Does it come with a snow plow installed?
The snow plow is included and detachable, so you can run with or without it depending on your preferred look.
Explore More
Round out your CSX fleet at squeakystrains.com/collections/o-scale, browse more diesel power at squeakystrains.com/collections/locomotives, or shop the full squeakystrains.com/collections/mth lineup.
