36:1
32:1 ratio
The factory owners manual recommends 20:1 fuel to oil ratio.
32-1
36 parts fuel to 1 part oil..........
1991 evinrude 9.9 engine, could you tell me the gas oil ratio please
should be 32:1
50:1
ratio is 16 ounces of oil per six gallons of fuel
DEPENDING ON WHAT TYPE OF FUEL YOU USE , IT CAN BE EITHER 40:1 , OR 50:1 .
The correct ratio for 1991 85hp Yamaha is 1:50. 1 liter of oil for 50 liters of fuel.
THE FUEL RATIO IS 32:1-----YOU NEED 4 OZ OF 2 CYCLE OIL FOR EVERY GALLON OF 92 OCTANE GASOLINE. :)