RE: Name this gas engine! Win a No-prize!
propellermonkey,
Let's not rush to judgement. Notice the the Walbro coil is not attached to the cylinder as in recent Ryobi's. The case is the early style, like the Evra 190 offered by Hobby Lobby in the around 1980. It is a twin ringed version and may be a 28cc. The carb is under sized, 7 to 8mm. It is a Ryobi, but a very early version.
Dave