The Tohatsu Diaphragm B is a crucial component for maintaining the performance and efficiency of your Tohatsu outboard motor. This specific diaphragm, part number 356-04005-0, is designed to fit various Tohatsu outboard models, including the 356-04030-0 and 853731. Made from high-quality materials, this diaphragm is built to withstand the harsh marine environment and provide reliable operation for years to come. It plays a key role in regulating the fuel flow within the carburetor, ensuring proper combustion and optimal engine performance. Replacing a worn or damaged diaphragm with the genuine Tohatsu Diaphragm B will help restore your outboard motor's power and efficiency. It is recommended to consult your owner's manual or a professional mechanic to ensure proper installation and compatibility with your specific outboard model. Investing in genuine Tohatsu parts like the Diaphragm B is essential for maintaining the longevity and reliability of your outboard motor, so you can enjoy smooth and trouble-free boating experiences.