Marine engine mounts play a crucial role in ensuring engine vibrations don't pass to your boat. Moreover, they absorb vibrations and shocks when the engine runs, preventing damage and ensuring comfort for those on board. Generally, like other engine components, marine engine mounts are designed to last. However, normal wear and tear down the line and contamination from the seawater, coolant or engine oil can affect their performance over time. Therefore, it's imperative to plan for replacement when this happens.