I'm interested to see that the HG Palmer shown in the link you provided has the carb/exhaust on opposite sides to mine. Is this unusual, or would the various applications these motors have been used for (edgers, pumps etc) explain this ? Is it as simple as the barrel being turned 180 degrees, or did it require different castings? I notice the Sheerline 2-stroke has the same configuration as the motor on my mower, but most other Victas I could see on Vintage mowers had the opposite (but that could be a failure to observe closely enough).
The fuel tank, which I suppose doesn't have to be originally matched with the motor, has a Victa fuel cap, which is on the opposite side to that on the HG Palmer. I will attach a photo of the tank and decal. Although it can't be seen in the photo, I can just make out a faded Victa mowers where Tiger was to be seen in the HG Palmer mower photos.
Along with the mower as I have shown it, I picked up a spare motor at the same time. It also has the same carb/exhaust configuration with the exhaust being cigar shaped as shown in the Sheerline 2 stroke photos you directed me to. I've attached a photo of the engine number (CA 1473P). Does it tell you anything re its origins?
And lastly, another motor I picked up somewhere (can't remember from where), which I assume has Victa origins, has the engine number 47720 396. I've thrown in a photo of the whole motor, which has a vacuum unit on the head and the spark plug seemingly entering slightly from the side rather than from the top (as per the other two motors). I assume that makes it a much later model.
Enjoy your weekend, Max (and any others who might happen upon this thread).