초록 ▼

A four-cycle outboard motor has a lubricating system designed with external gas transfer pipes. Additionally, an internal gas transfer passageway is arranged to encourage the gases contained within the lubrication pan to be expelled through the secondary passageways without substantially blocking a

A four-cycle outboard motor has a lubricating system designed with external gas transfer pipes. Additionally, an internal gas transfer passageway is arranged to encourage the gases contained within the lubrication pan to be expelled through the secondary passageways without substantially blocking a lubrication return line from a camshaft chamber or a crankshaft chamber. The outboard motor features an inline vertically oriented cylinder bank, such that oil introduced at an upper region and drains back to a lubrication pan through the lubrication return passageways arranged at a lower portion of the camshaft chamber and the crankshaft chamber.

대표청구항 ▼

1. An outboard motor comprising a four-cycle engine having an engine body which includes at least a cylinder block and a cylinder head assembly connected to the cylinder block, the cylinder block having at least one cylinder, the cylinder having a substantially horizontal axis, a piston arranged for

1. An outboard motor comprising a four-cycle engine having an engine body which includes at least a cylinder block and a cylinder head assembly connected to the cylinder block, the cylinder block having at least one cylinder, the cylinder having a substantially horizontal axis, a piston arranged for reciprocation within the cylinder and connected to an output shaft, the output shaft having a substantially vertical axis, at least one combustion chamber defined between the head assembly and a piston, at least one intake port and at least one exhaust port communicating with the combustion chamber, an intake valve capable of closing and opening the intake port, an exhaust valve capable of closing and opening the exhaust port, an intake cam shaft capable of moving the intake valve, an exhaust cam shaft capable of moving the exhaust valve, a head cover positioned over the intake cam shaft and the exhaust cam shaft and defining, in part, a cam chamber, a lubrication reservoir arranged generally below a lower end of the cylinder block, a lubricant return passageway extending between the cam chamber and the lubrication reservoir, a gas passageway connecting the lubrication reservoir and the cam chamber, wherein at least a portion of the gas passageway includes a gas pipe positioned external to the engine body, and not cast monolithically therewith.