G'day all,
Ric, the Victa 1996-8 Parts Manual is available [3.4MB PDF doco] here;
https://www.outdoorking-forum.com.au/images/files/1996-1998.pdfSee if you can find a Model Number on your machine, to match it exactly.
For engine servicing info, it would be helpful if you can find the engine model number. Should be a sticker on it somewhere.
There are service manuals available via the ODK Tecumseh paid subscription page; https://www.outdoorking-forum.com.au/forum/ubbthreads.php/forums/98/1/Engine_Manuals_&_Parts.html