I have three different "designs" of Ryobi 4 stroke 26cc weedeater engines i plan to convert when I get around to it. I am looking for a Stihl 4-mIX that is 4 stroke with valves but mixes the oil in the gasoline that is circulated in the sump before going to the intake valve. Lighter, attitude independent for lubrication and best of all STIHL. but also expensive. I have not found one yet at my engine graveyard. I plan to look this weekend as the spring may have brought out some no-gos ffrom the uninformed throw it away and buy new group.

Sincerely, Richard/Club Saito #635