Outboard engine

Details Outboard engine Outboard engine

B - Operations, Transporting

63

H

B63H 20/00 (2006.01) F01M 1/02 (2006.01) F01M 11/00 (2006.01) F01M 11/06 (2006.01) F02B 61/04 (2006.01) F02B 75/02 (2006.01) F02B 75/18 (2006.01) F02B 75/22 (2006.01)

Patent

CA 2369375

It is intended to provide a compact and lightweight outboard engine and to prevent its output loss by preventing or minimizing lubricant oil staying in a crank chamber while the engine is driven in a tilt-up condition. For this purpose, the outboard engine (1) mounted to a boat stern by a mounting device having a tilt shaft comprises an engine (2) including a flywheel (56) positioned at a lower end portion of a vertically extending crankshaft, and an oil pan positioned below the flywheel (56). An upper wall of a flywheel chamber (59) accommodating the flywheel 56 is made up of a bottom wall of a crank chamber made of a crankcase (30), etc., and a bottom wall (30a) of the crankcase (30) forming a front portion of the engine body (3) has a return oil path 71 formed forward of an inner circumferential wall surface (60e) of a circumferential wall (60) of the flywheel chamber (59) and having inflow openings (71a, 71b) through which lubricant oil flows from the crank chamber.

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