G'day folks,
This machine will have a 3L carby, which isn't governed. Don't know that there was ever a full throttle RPM spec for these, but that for the later G3 governed carb models is 3800-4200rpm.
As tomo4192 says, your best chance for a height adjuster segment is a NOS one on FleaBay - after all this is a ~50 year old mower! It comes in a set with the handle cover.
There's one up there now, ending Sunday. Plug 'vintage victa height' into the search window there to find it.
