313778 OMC WATER TUBE LONG

OEM Johnson/Evinrude/OMC water tube long (part 313778) is a cooling system component used in outboard engine cooling circuits. Part diverts raw water from water pump to exhaust housing and engine block for thermal management. Genuine factory original equipment. Specific application on individual engine models varies; reference service manual for compatibility. Part is available as new old stock from marine parts retailers specializing in Johnson/Evinrude outboard and sterndrive components.