Patent ID: 6428373
Filing Date: 2002-08-06
Classification: F02B

Abstract:
A ventilation cover structure for an outboard engine provided with: a four-stroke cycle engine having an engine block, a vertical crankshaft having an upper end portion projecting upward from the engine block, a vertical camshaft having an upper end portion projecting upward from the engine block, a belt-drive transmission including a camshaft driving pulley mounted on the upper end portion of the crankshaft, a camshaft pulley mounted on the upper end portion of the camshaft, and a belt extended between the camshaft driving pulley and the camshaft pulley to interlock the crankshaft and the camshaft, and a flywheel disposed above the camshaft driving pulley and mounted on the upper end portion of the crankshaft; and engine covers defining an engine room in which the four-stroke cycle engine is disposed, said ventilation cover structure comprising:a first cover for placement above the engine block so as to cover at least the flywheel and opening downward; and a second cover for placement above the engine block so as to cover a space extending over a portion of the engine block including the camshaft and opening downward; wherein when the first and the second covers are joined together and placed above the engine block, spaces covered with the first and the second covers are united in a single space, and sections of the first and the second covers lying outside a space occupied by the flywheel jointly form a discharge duct defining a space communicating with the single space covered with the first and the second covers.