The oil to fuel ratio for a 2004 model, 25 hp Mercury outboard is 50:1, roughly one pint of 2 cycle oil, to six gallons of fuel.
50:1
50:1
B128289
An 1985 model, 25 hp Mercury outboard requires a 50:1 fuel, to 2 cycle oil ratio.
normal is 50:1 16 ounces oil per 6 gallons of gas
Is there a shear on a 1975 mercury 200 (20hp) outboard motor
1984.
50:1
50:1
50:1
25:1 for break-in, after that 50:1
i have a 25 hp mariner and i use a 50:1 mixture