MF you nailed it, motor is from an alloy base low arch Mayfair, not sure where the pull start came from, it needed a bit of modification to the cowl to take the 2 rear screws, no big deal, file slots in the cup to make the starter grab and not slip. This motor would have been fitted with a G3 carby but it now has an LM fitted. Works like a treat and starts first pull, downside is I spent a lot of time building it up but it was just a little challenge and it gets rid of a couple more mowers from here and that keeps the missus off my back
