What year is the 8hp Mercury outboard with serial o6156590 ?
An 8hp Mercury would require a 50 : 1 ratio of fuel to oil, one pint of 2 cycle oil to six gallons of fuel.
50.1 ratio
50 to 1
50/1
My 75 Johnson is 50:1. If you use a synthetic oil you won't need to worry about it and no more smoke from too much oil
model number AE30ELCCE
The correct ratio of fuel to oil for the 8hp Merc is 50:1. Roughly one pint of 2 cycle oil to six gallons of fuel.
I have an early 90's 2cyl, 8hp, 2-stroke and the gap is .040.
185psi
50/1
Mercury outboard, 8hp, sn A721731 manufactured in 1987.