not 100% sure but almost all new saw says 50 to 1.but i never run them that lean even if they saw its fine.i mix my stihl 35 to 1.if it doesnt fowl plug i run em heavy,i have a old 1980 saw that has cut 300 cords of wood and never had any work at all except replaced fuel line and filter.
50/1
40:1
I use 4oz. per gallon of gas.
50:1
.025:1, gas to oil
Looks to be 40:1 gas to oil
8 oz of oil per gallon of gas
jonsered oil/gas mixture ratio is 50 to 1.
The perfect gas oil mixture for the jonsereds 49SP is 1:40 !
i would have to know what kind but it is gennerally 32:1
1 gal gas + 2cycle engine oil
50-1 ratio most definitely.