Fuel/oil mixture ratio for 31cc weed wacker?

[DamoMotorized]

What fuel/oil mixture ratio should i use for my 31cc Ryobi weed wackers?

At the moment i have been using 40:1. Is that ok?

 

[RdKryton]

32 to 1 is what I found online. I use 24 to 1 in mine because that's what my chain saw uses too. 40 to 1 may be a little light on the oil unless your using something like Opti-2.

Jim

 

[DamoMotorized]

Thanks. Yeah i guess i will use 32:1, better to be safe.