It's aliiive!!!

Lessons learnt:
1. Things are sometimes much quicker and easier than expected
2. On top of a wheelie bin is a good spot to plonk a mower when you don't have another workspace
3. Draining the fuel
before taking the bowl off the carby is advisable
4. People on this forum know their stuff
Thanks everyone!

Oh, and I didn't take the top cover off the engine so didn't get the numbers, but it is a "Made in USA" B&S Quantum 60 and there's another sticker at the front that says "XRS". I was able to get the bowl off without taking anything else off and the main jet was in the nut, just as vccomm said.
I've been looking around the forums, and there's some great stuff here. Having seen some pictures, I'm strangely attracted to a Victa Vortex, just for the look of it.
I have:
The resurrected Masport, a Rover ProCut 560, Masport Home Gardener, Shindaiwa T230XR and a Stihl SH86CE. I'm on the lookout for an edger next, probably an Atom.