Sorry vint_ mow I cant help, I do get the occasional Tecumesh on an alloy base Victas that are in good condition, dump the motor and keep the base. Can't say I have ever bothered to even see if they will run, always something wrong/missing on them usually with the carby so I don't waste my time.
You would have loved the Victa mower I saw abandoned on a street corner recently. It looked promising until I got out of the car and found the handles rusty, the base with rust bubbles all over it and a Tecumseh motor with missing fuel cap and busted pull starter. The nylon bearing wheels were badly worn and tatty as well. Absolutely nothing useful to be had from this mower.