Mac 310 fuel/oil ratio is 40:1
From 1975 when I owned a mac 3 it was fine at 25 to 1 regards
16:1
The full ratio according to the embossed diagram on my Mac Cat 435 fuel cap is 40:1. Hope this helps.
3216
5784 + 3216 = 9,000
402
There are: 3216*12 = 38,592 inches
1st Use a calculator 3216 / 8 = 402 2nd 3216 =3200+16 =8*400+8*2 =8*(400+2) =8*402 3216/8=402
8 into 3200 is 400 8 into 16 is 2 3216/8 = 402
mine says 40:1 on the gas cap, and its the origanal cap. hope this helps.
25 to 1 is the mixture for the fuel