Genuine Yanmar Saildrive Diaphragm Part B.
This is a genuine 196420-02721 Yanmar replacement diaphragm, Part B for all SD20, SD25, SD30, SD31 and SD50 Saildrives.
Yanmar Saildrive's diaphragm bellows should be changed every 7 years, often as an insurance requirement.
This genuine Saildrive diaphragm bellows is part B. Part A is 196420-02712.
Yanmar Part Number: 196420-02721
Previous part number: 196420-02720
Please note:
The diaphragm part required is 196420-02712.
The outer securing band required is part number 196420-02740.
The inner securing band is part number 196420-02730.
The O-ring between the upper and lower leg is part number 24321-000750
For Yanmar diesel engines:
SD20, SD25, SD30, SD31, SD40 and SD50 Saildrives.
