Inboard QuestionsSterndrive Questions

Q:

What is the purpose of the rubber cushion hub in an outboard prop?
A: It is not intended to prevent blade damager as is sometimes assumed. This device protects lower unit parts by cushioning the shock of propeller impact. Its prime purpose, however, is to prevent excessive breakage of shear or drive pins that otherwise would occur due to the jolt or shock that is experienced in the process of shifting gears.


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