Natural Gas engines: major World manufacturers  

1. CATERPILLAR
2. Cooper Cameron Corporation
3. Cummins Engine Company
4. Detroit Diesel Corporation - manufacturer of diesel and naturalgas engines
5. Deutz AG
6. Fairbanks Morse Engines - manufacturer of diesel engines for locomotive, power generation and pump drivers. OEM source for parts and service.
7. Jenbacher
8. Kohler Co.
9. MTU Friedrichshafen - diesel engines from 35 kW up to 7400 kW gas turbines 13,6 MW up to 44 MW cardan shafts injection systems.
10. Pielstick S.E.M.T.
11. Perkins
12. Wдrtsilд Diesel - manufacturer of medium-speed diesel engines and gas engines and supplier of high-speed marine diesel engines.
13. Waukesha Engine Division Dresser Industries - global manufacturer of gaseous fueled internal combustion engines for natural gas compression, prime and standby power generation, pump, chiller and other industrial applications.
14. IMPCO Technologies - designs, manufactures and markets equipment that allows internal combustion engines to operate on alternative fuels, primarily propane and natural gas
15. Air-x-changers - manufactures custom-designed engine-driven and horizontal electric motor-driven air-cooled heat exchangers for the natural gas and process industries worldwide.
16. Penzdieselmash- Russian manufacturer of medium speed diesel and natural gas engines.
17. ГП "Malyshev Plant Малышева"- Ukranian manufacturer of diesel and gas gensets 1000 KW and more.