50to1
i have a 25 hp mariner and i use a 50:1 mixture
50 to 1 6 gallons of gas 1 pint oil
The 1998 model Mariner outboards use a 50:1 ratio.
Try this site - http://www.marineengine.com/mfr/mariner_outboard.html
A 175hp Mercury outboard requires a 50:1 fuel to oil ratio.
A 40 hp Mariner outboard requires a 50:1 ratio, one pint of 2 cycle oil, to six gallons of fuel.
50 parts gas 1 part oil so 1 pint of oil for every 6 gallons of gas
If it the Yamaha import it 100:1 and if late model Mercury built it s 50:1
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!
Usually 50:1. Use a good quality, brand name oil that has been blended for marine use.
The oil to gas ratio for a 1995 Mariner 150 HP 2.0 liter outboard motor is typically 50:1, which means 50 parts gasoline to 1 part oil. This ratio is common for many modern two-stroke outboard motors, but it's always best to check the owner's manual or manufacturer's specifications for confirmation. Using the correct ratio ensures optimal engine performance and longevity.
A 1979 70 HP Johnson burns about 3.5 GPH at 3/4ths WOT