The fuel oil ratio for a 140 hp Mariner outboard motor is 50:1. Mariner is a brand of the Mercury Marine company.
50.1 ratio
50 to 1
50 to 1
model number AE30ELCCE
A 175hp Mercury outboard requires a 50:1 fuel to oil ratio.
The 3.3 hp Mariner outboard requires a 50:1 ratio, one pint of 2 cycle oil to six gallons of fuel.
The 1998 model Mariner outboards use a 50:1 ratio.
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
The correct ratio for a 5hp Mariner outboard would be 50:1, this is roughly one pint of 2 cycle oil, to six gallons of fuel.
A 5 hp Mariner outboard will do fine with a 50:1 ratio, one pint of 2 cycle oil, to six gallons of fuel.
I always run my 2 cycle outboards at a 50 to 1 ratio. also be sure you are using outboard 2 cycle. not all 2cycle oil is the same!