Victa VC 160 2-stroke push/walk behind. Australian invented/originated, but
has been acquired by B&S to sell more of their cheap, nasty engines. The
VC 160 engines are among the simplest and gutsiest around. The starter
pawls and pins are inside the crank case (!) which gives the engine and
mower a very low profile.
I have three. Hurricane x 2 (one key start, t'other with that functionality
removed; and one other of around the same year, as a back-up.) The key
start model is noticeably heavier, with all the extra hardware.
I've adapted all with a removable rear-end deflector chute that spreads the
clippings better than the standard equipment.
A Husqvarna 260ACX is on the wish-list.