1) Remove the retainer ring from the fuel tank using the special tool.
Caution
- Do not reuse the retainer ring.
- Cover the retainer ring with a shop cloth, etc.
- Breakage may occur if the special tool comes into contact with the ribbed bottom portion of the retainer ring.

SST: 5-8840-3263-0 - Wrench;Chain
2) Remove the fuel tank unit from the fuel tank.
Caution
- The fuel tank unit seal cannot be reused.
- Remove it gradually not to distort the float arm.