G'day Mystyler,

Have you seen this History Record thread on the 320's?

https://www.outdoorking-forum.com.au/forum/ubbthreads.php?ubb=showflat&Number=59826

Even includes a PDF Owner Manual - which says that the fuel tap is push-pull. On that vintage of mower, it will have a cylindrical cork seal, not o-rings. Replacement seals are still available through the ODK Shop.
https://www.outdoorking-forum.com.au/engines...r-fuel-parts/victa-fuel-tap-cork-ha25031


Cheers,
Gadge

"ODK Mods can explain it to you, but they can't understand it for you..."

"Crazy can be medicated, ignorance can be educated - but there is no cure for stupid..."