Patent ID: 6645019
Filing Date: 2003-11-11
Classification: B63H,F02B,F16F

Abstract:
An outboard engine system comprisinga system body (41), an engine (E) mounted on said system body (41), a mounting means (55) which is detachably mounted to a hull (S), and a mount device (65) having a pair of left and right elastomeric members (74) for supporting said system body (41) on said mounting means (55), characterized in that said engine (E) is disposed such that a crankshaft (15) is disposed vertically, and a cylinder head (12) is disposed to face rearwards with a cylinder axis disposed in a longitudinal direction parallel to a propeller shaft (53), and a rate of balance between the reciprocal inertia mass of a piston (14) and a rotational inertia mass of the crankshaft (15) is set at approximately 100%; said elastomeric members (74) are disposed on left and right opposite sides of the engine (E), and the rigidity of said mount device (65) is set so that the rigidity in a tangent direction about a phantom center point (C) of vibration in a high rotational speed range of the engine (E) is lower than the rigidity in a radial direction about the phantom center point (C) of vibration.