The 1981 model 9.8 hp Mercury outboard requires a 50:1 ratio, this is roughly 1 pint of 2 cycle oil, to 6 gallons of fuel.
50 : 1 is the correct fuel mixture
A 4hp Mercury outboard requires a 50:1 fuel to 2 cycle oil mix.
50:1
50:1
50:1
50;1
50:1
I have a 1999 Mercury 2stroke 5HP outboard and the owners manual states 50:1 Gas/Oil mixture.
20/1
the mixture is 50:1
For the Mercury 9.9 Two Stroke Engine it is 50:1...
50-1