Outboard motor
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorKatsumi OCHIAI
Life of this patent
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Abstract
An engine is disposed in a top cowling. Burned gas produced in the engine is discharged to the outside through a first exhaust pipe, a second exhaust pipe, a third exhaust pipe, exhaust passage, and a exhaust passage. A catalyst is disposed to be housed in the first exhaust pipe and the second exhaust pipe. The first exhaust pipe and the second exhaust pipe are disposed in the top cowling. A fan is provided above the catalyst. As a result of this unique structure, a temperature increase in the cowling is prevented from being caused by heat radiated from the catalyst.
Claims10
An outboard motor comprising:
- a cowling;
- an engine disposed in the cowling;
- a discharge section arranged below the cowling and to discharge burned gas generated in the engine;
- an exhaust passage arranged to guide burned gas from the engine to the discharge section;
- a catalyst arranged to purify the burned gas in the exhaust passage;
- and
- an electric fan arranged above the catalyst and to discharge air in the cowling to an outside of the cowling.
The outboard motor according to claim 11, further comprising a second cover member arranged to cover a side of the catalyst.
Dependencies are inferred from the claim text.