Which component has a clear body allowing for visibility of blockages?

The raw water strainer is designed with a clear body, often made of transparent materials such as plastic or glass, which allows for easy visibility of any blockages or debris that may accumulate inside. This design is crucial for boat maintenance because it enables the operator to quickly and visually assess the condition of the strainer without needing to disassemble it. Regular inspection can prevent clogging that could lead to engine overheating or other issues, ensuring the proper flow of cooling water through the system.

In contrast, other components such as the fuel filter, oil cooler, and exhaust manifold typically do not feature clear bodies. They are either opaque or require more extensive disassembly for inspection, making the raw water strainer unique in its visibility aspect and maintenance convenience.