Ab Volvo Penta
Abb Marine & Ports
Akasaka Diesels Ltd.
Anglo Belgian Corp.
Becker Marine Systems
Bergen Engines
Beta Marine Uk
Bukh A/s
Burmeister & Wain
Caterpillar Marine Power Systems
CUMMINS INC.
Daihatsu Diesel
Deutz AG
Diesel United
Doosan Infracore Co. Ltd.
Fairbanks Morse
FPT INDUSTRIAL S.P.A.
Gardner Marine Diesels
GE MARINE SOLUTIONS
GM Powertrain
Hitachi Zosen
HYUNDAI HEAVY INDUSTRIES
HYUNDAI SEASALL
JAPAN ENGINE CORP.
JOHN DEERE POWER SYSTEMS
MAKITA CORP.
MAN ENERGY SOLUTIONS
MERCURY MARINE
MITSUI E&S MACHINERY CO. LTD.
MOTEURS BAUDOUIN
MTU FRIEDRICHSHAFEN GMBH
NANNI INDUSTRIES
NIIGATA POWER SYSTEMS
PERKINS ENGINES CO. LTD.
PROGRESS RAIL
Rolls-Royce
SCAM MARINE
SCANIA
SIEMENS AG
SINOTRUK
SOLE DIESEL
STEYR MOTORS
WARTSILA CORP.
WEICHAI HEAVY MACHINERY CO.
WINTERTHUR GAS & DIESEL LTD.
YANMAR
ZORYA-MASHPROEKT