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Claims for Patent: 6,062,927

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Claims for Patent: 6,062,927

Title: Component arrangement for outboard motor
Abstract:This invention is an outboard motor for use in propelling a watercraft. The motor has a cowling in which is positioned an internal combustion engine. The internal combustion engine comprises a V shaped cylinder block cooperating with first and second cylinder heads to define first and second cylinder banks. The cylinder banks form a valley therebetween. Each of the cylinder banks include at least one combustion chamber. A crankcase is located at an end of the block opposite the heads forming a crankcase chamber. The engine also includes an exhaust system for routing the products of combustion from at least one combustion chamber and an intake system for providing air to the at least one combustion chamber. The intake system includes a single surge tank positioned between the cowling and the crankcase of the engine. At least one first intake pipe extends from the surge tank in a first direction along the cylinder block to the first cylinder head and at least one second intake pipe extends along the cylinder block to the second cylinder head.
Inventor(s): Hiraoka; Noriyoshi (Hamamatsu, JP), Takahashi; Masanori (Hamamatsu, JP)
Assignee: Sanshin Kogyo Kabushiki Kaisha (Hamamatsu, JP)
Application Number:09/018,901
Patent Claims: 1. An outboard motor for use in propelling a watercraft, the motor having a cowling in which is positioned an internal combustion engine, said internal combustion engine comprising a V shaped cylinder block cooperating with first and second cylinder heads to define first and second cylinder banks, said cylinder banks forming a valley therebetween juxtaposed to a first end surface of said cowling, each of said cylinder banks including at least one combustion chamber, a crankcase located at an end of said block opposite said heads forming a crankcase chamber in which a crankshaft is journalled for rotation about a vertical axis, said crankcase being juxtaposed to a second end surface of said cowling, an exhaust system for routing the products of combustion from said at least one combustion chamber of each of said cylinder banks, an intake system for providing air to said at least one combustion chamber of each of said cylinder banks, said intake system including a single surge tank positioned between said cowling second end surface and said crankcase of said engine, at least one first intake pipe extending directly from said surge tank in a first direction along said cylinder block to said first cylinder head and at least one second intake pipe extending directly from said surge tank along said cylinder block to said second cylinder head.

2. The outboard motor of claim 1 wherein a silencer is located, at least in part, under said surge tank for delivering air to said surge tank, and further including a throttle body member located in the flow path between said silencer and said surge tank.

3. The outboard motor of claim 1 wherein said at least one first intake pipe is located on a first side of said V shaped cylinder block outside of said valley and a first component is mounted beneath said at least one first intake pipe and said at least one second intake pipe is located on a second side of said V shaped cylinder block outside of said valley and a second component is mounted beneath said at least one second intake pipe.

4. The outboard motor of claim 3 wherein the first component is an ignition control and the second component is a vapor separator.

5. The outboard motor of claim 3 further including a third component being located between said at least one first intake pipe and said V shaped cylinder block and a fourth component is located between said at least one second intake pipe and said V shaped cylinder block.

6. The outboard motor of claim 5 wherein said third component is a starter motor and said fourth component is a fuel pump.

7. The outboard motor of claim 6 wherein said first component and said third component are located on one side of said V shaped cylinder block and said second component and said fourth component are located on a second side of said V shaped cylinder block.

8. The outboard motor of claim 1 wherein an alternator is mounted above said surge tank.

9. The outboard motor of claim 1 wherein the surge tank is located between a surface of the crankcase facing away from the cylinder block and the cowling.

10. The outboard motor of claim 9 wherein the surge tank does not extend transversely beyond the sides of the crankcase.
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