Cool,.... Thank you,...... 8 ounces it is,......Mix is 50:1----Is your tank volume in US gallons or IMP gallons ?---400 ounces requires 8 ounces of oil.------And ~500 ounces takes 10 ounces of oil.
Depending on which GallonYes, a 50:1 mix is about 2-1/2 ounces per gallon.
1979 Merc 7.5hp,...