Nice find(s). I think it's pot luck whether you get a Tillotson or Walbro carbies in that era of Ryobis but a mate who dug a green lawn hornet out of his pile of junk also had a Tillotson. We bought the slightly higher spec Weed Hornet back in 89 with the larger green cover and it had a Walbro. It gave sterling service and impressed everyone who saw it perform it's duties!!
I love my Mitsubishi TU26 straight shaft number these days, but enjoy the nostalgia of using the comparatively torquey Ryobi for leaf blowing duties with the blower attachment.
Nice metal covered Monaro there. Pity you are in Perth v as I could let you have the chassis of an old store brand I have with that same chassis in the same Mayfair gold hammered finish without the hole, but everything else to do with the chassis has failed such as height adjustment.
