If you want it to last, use a name brand oil mixed (really good) to a ratio of 32:1. That's 1 quart oil to 8 gallons of gas.
If you use Mercury brand oil and mix it really, really, really good, you can go 50:1. That's 1 quart oil to 50 quarts of gasoline.
50/1
50:1
it is recommended for all fuel oil mix to be 50:1
the ratio is 50:1 3oz per gallon
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.
As far as I know is 50:1.
A 175hp Mercury outboard requires a 50:1 fuel to oil ratio.
50:1
Merc's use a 50:1 mix
The 1976 year model, (ser.#4420321), 4.5hp Mercury outboard, requires a 50:1 fuel, to 2 cycle oil ratio. Mixing one pint of oil, to six gallons of fuel, will be a good mix.
The fuel to oil ratio for a 1984 model, 50 hp Mercury outboard is 50:1. This is roughly one pint of 2 cycle oil, to six gallons of fuel.
35:1 is the fuel mix ratio