Radiator cap replacement for 2gm20f

[Dubo]

My radiator cap is shot on my Yanmar. Does anyone know what the PSI rating should be and will an off the auto parts shelf cap be ok as a replacement?

thanks

 

[Ed Schenck]

I have seen radiator caps on Yanmars that were all rusted. I wonder where they were purchased? My 1979 2QM20 cap was always shiny. Maybe Torresen would provide the details. They do sell the cap: http://shop.torresen.com/ships_stor...0-44590&prod_name=Radiator+Cap&sectionid=5160 .