50:1 16oz per 6gal tank
The dry weight of an 85hp Yamaha outboard is 245lbs.
60kph
50:1
50:1 ratio 16 oz 2 stroke marine motor oil to every 6 gallons of gasoline this is most common I use this mix ratio in my 80 hp mercury spitfire
An 85hp Mercury outboard, serial number 3867469, is a 1974 year model.
1975-76.
you have to make ngk b8hs-10
Champion L77-JC4 plug set to .030in.
The oil / fuel ratio for the 1977 model, 85 hp Evinrude outboard, is 50:1, roughly one pint of 2 cycle oil, to six gallons of fuel.
The year model of an Evinrude outboard cannot be determined from the serial number, but rather from the model number.
50:1 /16Oz.per 6 Gals. gas. I have the same outboard.
the age is 1983 mercury buddy.