Crusader - www.crusaderengines.com

Cummins - www.cummins.com

Detroit - www.detroitdiesel.com

Evinrude - www.omc-online.com

Force - See Mercury Marine

GE (General Electric) - Turbine's

Honda Marine - www.honda-marine.com

Johnson Outboard - www.omc-online.com

Lehmans - Unknown

Lister - Unknown

Lycomming - Turbine's

M.A.N. - www.man-mec.com

MTT - Marine Turbine Technologies - www.marineturbine.com

Mercury Marine / merCruiser - www.mercurymarine.com

MTU - Unknown

Nissan Marine - www.nissanmarine.com

OMC - www.omc-online.com Also Evinrude and Johnson outboards

Perkins - www.perkins.com

Pratt and Whitney www.pratt-whitney.com - Turbines

Rolls Royce - Turbine and large piston engines

Universal - www.westerbeke.com

Volvo Penta - www.penta.volvo.se

Yamaha - www.yamahausa.com/marine.htm

Yanmar - www.yanmar.com

Westerbeke - www.westerbeke.com