This mount can be soft to reduce engine vibration because a separate part of it handles the horizontal thrust of the engine. Most rubber mounts have to be too hard for the first task in order to handle the second.
Engine mounts that are cast-molded from two hardnesses of elastomer. The softer inner core provides vibration, noise and shock dampening, while the stiff outer shell restricts engine movement.
Mount gives good vertical compression for optimum damping of vibrations, while horizontal fore-and-aft stiffness accepts considerable thrust.. Models from 6 to 480 HP.
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Placed between the engine and its supports, these adjustable mounts reduce structure-borne noise.