US 6,484,685 B2 · Outboard engine

Abstract

An outboard engine comprises an engine having a crankshaft (36) extending vertically, a flywheel 56 provided on the crankshaft (36) below the engine body, an oil pump (58), and a flywheel chamber (59) defined by a pump body (65) of the oil pump (58) united to coupling walls 61, 62 of the engine body to accommodate the flywheel 56; and a mount case (4) having a support wall 64 for uniting the engine body. The engine body is united with its coupling walls (61, 62) to the support wall (64) via an outer circumferential wall (63) of the pump body (65) such that the coupling walls (61, 62), outer circumferential wall (63) and support wall (64) overlap in the direction of a rotation axis of the crankshaft (36). Such outboard engine permits a connecting portion between the engine body and the mount case, which are united together via the oil pump body, to be decreased in size and weight.

Claims10

Dependent claims

An outboard engine including:

an engine having an engine body, a crankshaft extending vertically in the engine body, a flywheel provided on the crankshaft below the engine body, an oil pump driven by a driving power of the crankshaft, and a flywheel chamber defined by a pump body of the oil pump to accommodate the flywheel;
and a mount case having a support portion for uniting the engine body, wherein:
said engine body is united with a coupling portion thereof to said support portion via an outer circumferential portion of said pump body such that said coupling portion, said outer circumferential portion of the pump body and said support portion overlap in the direction of extension of a rotating axis of said crankshaft.

An outboard engine including:

an engine having an engine body, a crankshaft extending vertically in the engine body, a flywheel provided on the crankshaft below the engine body, an oil pump driven by the crankshaft, and a flywheel chamber defined under said engine body between the engine body and a pump body of the oil pump which is coupled to a bottom of the engine body to accommodate the flywheel;
and a mount case having a substantially annular upstanding support wall on an upper surface thereof, said support wall uniting the engine body to the mount case, wherein:
said pump body is in the form of a pump housing and has an outer circumferential wall and said engine body has a substantially annular coupling wall projecting downwardly from the bottom of the engine body, said engine body being united with said upstanding support wall via said outer circumferential wall of said pump body such that said coupling wall, said outer circumferential wall of the pump body and said support wall overlap in the direction of extension of a rotating axis of said crankshaft.

Dependencies are inferred from the claim text.

Outboard engine

Life of this patent

Outboard engine

Life of this patent

Abstract

Claims10