G'day Norm,
Jeff I paid $20 for the one I just pulled the Briggs off, Gadge put me onto that one but it was a fair drive to the Morwell tip to pick it up and a bloke just picked his mower up that I had fitted that Briggs on. I never expected that it would ever run, obviously had been out in the weather for a very long time, but it starts and runs well so he went away a happy man.
Interesting that the Briggs was original fitment on that 24; I wasn't sure of that, when I looked it over.
Those Briggs Quantum 50 series 190cc models seem to be a lot better engine than I'd really expect of a sidevalve with a plastic camshaft; I have one on a Masport alloy chassis Maxicatch 550 - it's my 'everyweek mower'. The US built ones, at any rate - mine's one of those.