1:100....
50 - 1
50;1
A 175hp Mercury outboard requires a 50:1 fuel to oil ratio.
50:1
If manufactured after 1965, an 80 hp Mercury outboard requires a 50:1 fuel, to 2 cycle oil ratio.
The fuel to oil ratio, for the 1983 model 70 hp Mercury outboard, is 50:1. This is roughly one pint of 2 cycle oil, to six gallons of fuel.
The 1996 model, 15 hp Mercury outboard requires a 50:1 ratio, one pint of 2 cycle oil, to six gallons of fuel.
50:1
The 4.5 HP Mercury Outboard requires 50 to 1 fuel, to 2 cycle oil ratio. A mix of six gallons of gallons of fuel to one pint of oil is a good mix for the Outboard.
It depends on what year it is.
50/1
40:1 ratio