o ring in fuel tank valve 704

[Sailman 1,134]

I am just about completed with the 704 but the fuel tank is leaking from the shut off valve. The valve is attached to the metal tank so I can't replace it without serious cutting the tank. I have taken it apart and appears there should be an o ring. Any idea what size o ring? Is a replacement part available that replaces just the part pictured (not the body that attaches to the tank).

 

 

[peter lena 8,072]

@Sailman  don't have a  O  ring size , but use , super lube 4 oz Hydraulic Oil Bottle 68 ISO Viscosity, 80W SAE 52004 | Zoro on any rubber to metal movement point , local H/W  has small bottles in stock , makes for a smooth  / easy rubber/ plastic/ metal , slide / fit point , use this for years, pete