I have always said pretty don't cut the grass, a tough motor does and the Briggs just ain't tough motors,never have been, but the public love them because they are a 4 stroke. Give me a Victa 2 stroke any day, even the little 125's will blow the doors off all these new fancy looking mowers on the market now. The people are being dudded and they don't even know it
G'day Norm,
The Kirby-Lauson and Kirby-Tecumseh vertical shaft 4 stroke engines were much the same, on the 1960's models.
By the 70's, most of them had gone to the scrappies, and the two-stroke Victas of that era were still getting repaired, and soldiering on.