About Us

We offer new, used and remanufactured “exchange" engines, power units and generator sets. Our qualified personnel can design, package and install power systems customized to your specific needs. All of our new and remanufactured equipment has been dyno or load bank tested and carry the industry standard 6-month warranty. Our customers are welcome and encouraged to witness testing at our facility.


For over forty years S&W has provided systems and generator sets to the oil patch. Our engines range from 35 h.p. to 2000 h.p. in both diesel and natural gas. We sell generators ranging from 5 kw to 2000 kw. We offer a variety of brands including:


  • Caterpillar
  • Cummins
  • Waukesha
  • Detroit Diesel
  • Volvo
  • Kohler
  • Kato
  • EM
  • Stamford
  • Marathon
  • CAT SR4
  • and more


Operate your diesel engines on natural gas


  • No engine modifications required
  • No power or efficiency losses
  • Low cost and easy to install
  • Allows use of interruptible gas
  • Extends run-time of standby engines
  • State-of-the-art controls and monitoring
  • Does not require high-pressure gas supply
  • Reduces operating costs
  • Lower Emissions


The GTI Bi-Fuel system from Altronic, Inc. is an innovative technology that enabled operators of heavy-duty diesel engines to substantially reduce operational costs and lover emissions by substituting diesel fuel with lower cost, cleaner-burning natural gas. The Bi-FueI System is comprised of patented technologies that allow engines to safely operate on gas percentages up to a maximum of 70%* of the total fuel requirement. Engines converted to GTI Bi-FueI exhibit diesel-like performance in such critical areas as efficiency, stability and load acceptance. A key feature of the Bi-FueI System is its ability to switch fuel modes without interruption in engine power output. The engine can be switched between diesel and gas automatically while maintaining speed and load.