For a number of obvious reasons, mostly to do with safety and peace of mind, your Yamaha marine engine has to be reliable (safety) smooth (comfort) and powerful (safety, comfort and overall performance).
The engine this component suits is renowned for its rugged reliability and longevity, so when the time comes for a complete refurbishment/rebuild, make sure that any part displaying wear, damage or excessive salt water corrosion is replaced with a new component if the old item is beyond economic repair?
More parts related to the cylinder, cylinder-head and crankcase you may wish to consider:
Add as many items as you wish to the same shopping cart, new gaskets, seals and shiny new bolts (the old ones will probably be corroded beyond re-use) for example, and still only pay the same single fixed price shipping cost. Pro-workshop Gasket sealant, 08C70K0234M to help achieve a professional level of engine building expertise. This component may have other applications within Yamaha marine engines and/or motorcycles; so please make sure you order the correct part number/s for your application.