A 175hp Mercury outboard requires a 50:1 fuel to oil ratio.
40to1
50:1
mix 50:1
50 to 1 oil and gas mixture
50 to 1
The gas to oil ratio is 50 to 1 50: 1 I have the same motor, good luck
Its 4 stroke so 100:0
My 2003 3.3hp outboard motor is 50:1 mixture.
the ratio is 50 to 1 50 parts gas to 1 part oil so 6 gallons of gas per 1 pint of oil
I just purchased a 1977 merc 7.5 horse and the mechanic said to use 4 ounces of oil per gallon of gas.
The 20 hp Mercury outboard requires a 50:1 ratio, roughly one pint of 2 cycle oil, to six gallons of fuel.