Patent Number: 6,250,982

Title: Exhaust arrangement for outboard motor

Abstract: An exhaust system for an outboard motor wherein the exhaust pipe which depends into the expansion chamber formed in the drive shaft housing is provided with a separate cooling jacket. Water from this separate cooling jacket is discharged into the expansion chamber at a point well below the discharge end of the exhaust pipe in a direction away from the exhaust pipe so as to avoid water ingestion into the engine through the exhaust system. A second expansion chamber communicates with an above the water exhaust gas discharge. This second expansion chamber communicates with the first expansion chamber through a restricted path formed in part by a flange of the exhaust pipe.

Inventors: Kashima; Yukinori (Hamamatsu, JP)

Assignee: Sanshin Kogyo Kabushiki Kaisha

International Classification: B63H 20/24 (20060101); B63H 20/00 (20060101); F01N 7/00 (20060101); F01N 7/12 (20060101); F01P 3/20 (20060101); F02B 61/00 (20060101); F02B 61/04 (20060101); B63H 20/26 (20060101); B63H 021/32 ()

Expiration Date: 06/26/2018