Gday all
Tyler, I must correct myself here.
This is a genuine Victa document, and I guess it makes the issue more complex.
I guess I was wrong

- at least in how the Imperial was introduced.
https://www.outdoorking-forum.com.au/forum/ubbthreads.php/topics/89934/victa-news-cuttings-january-1976.htmlMy best guess is that Victa simplified thinks after the Imperial 2-stroke's introduction in 1972-73.
The linked document suggests an alternative in the early days of the Imperial 2-stroke:
BP Zoom outboard
or use Victa's
EZIMIX at an 80:1 ratio.
I'm hoping
Tyler or
Gadge might explain this better than I have.
Cheers------------------------
Jack