Use premium gas <non-oxegenated mixed with outboard oil. On the gas pump will be a sticker saying its for boats. Gary J.
50-1
What is the fuel to oil ratio for a mercury 9.9 hp 2 stroke engine?
The 1978 model, 115 hp Mercury outboard requires a 50:1 ratio, one pint of 2 cycle oil, to six gallons of fuel.
The fuel / oil ratio for the 1997 model, 25 hp. Mercury outboard, would be 50:1, this is roughly one pint of 2 cycle oil, to six gallons of fuel.
140 hp
The 4 hp Mercury requires a 50:1 ratio, roughly one pint of 2 cycle oil, to six gallons of fuel.
The 1987 model, 50 hp Mercury outboard requires a 50:1 ratio, mix one pint of 2 cycle oil, to six gallons of fuel, or 3 ounces of oil per gallon of fuel.
1966-67
it,s a 1988 mercury 50 hp motro
50/1
Mercury Marine has recommended 87 octane fuel in their outboards. While the engine may well run on a lesser octane fuel, I would personaly err to the side of a higher rated fuel.
The 1995 Mercury 25 hp outboard has an approximate weight of 95 pounds. Use care when mounting on a boat already on the lake, as the engine could easily be dropped into the water.