Yamaha Hatsudoki Kabushiki Kaisha

Japan Metal Gasket Co., Ltd.

Takanobu Suzuki

Hiroyuki Matsumoto

Takuma Kameyama

A metal gasket has a primary bead formed on an area positioned between a cylinder bore and a cooling water passage. A second bead is formed on an area corresponding to an opening of one or more cooling passages. A base member of the metal gasket comprises bead plates that have a rubber coating layer. The base member also comprises a shim member disposed between the bead plates. The primary bead is formed by defining a space respectively between the bead plates and the shim member. The secondary bead is formed by defining a space on a given area between the bead plates.

Sealing structure using metal gasket

A metal gasket is made up of a backing material made of stainless steel, a galvanizing film is formed on a surface of the backing material, and a sealing rubber film is formed on a surface of the galvanizing film. In one embodiment a silane coupling type vulcanizing adhesive is applied to the surface of the galvanizing film and heated at a temperature of 100&#xb0; C. to 200&#xb0; C. for a prescribed period to generate a zinc oxide film on the surface of the galvanizing film and to bake the silane coupling type vulcanizing adhesive. Vinylidene fluoride type rubber containing a polyol type vulcanizing agent can be calcined onto its surface to form the sealing rubber film. The metal gasket can be provided on a mating surface of a cylinder head and a cylinder body of an engine provided in an outboard motor.

Growing community of inventors

Shizuoka, Japan

Takanobu Suzuki