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If not using oil injection, the 115 hp Yamaha outboard will require a 50:1 ratio.
50.1
The 1997 model, 6 hp Yamaha outboard, requires a 50:1 ratio, one pint of 2 cycle oil, to six gallons of fuel.
The 1982 model, 115 hp Johnson outboard requires a 50:1 ratio, one pint of 2 cycle oil, to six gallons of fuel.
The 1992 model, 25 hp Yamaha outboard requires a 50:1 ratio. One pint of 2 cycle oil, to six gallons of fuel.
What is proper oil to gas ratio for a 1998 50hp Evenrude outboard
Older models often have 1:50 ratio. Never have 1:100 This information should be on a sticker on the block or under the "hood"
100:1 Sais so on the manual. Be careful, other outboard motors use 50:1.
If not equipped with oil injection, a 50:1 ratio is required. This is roughly one pint of 2 cycle oil, to six gallons of fuel.
A 175hp Mercury outboard requires a 50:1 fuel to oil ratio.
The 1979 model, 115 hp Johnson outboard requires a 50:1 ratio, one pint of 2 cycle oil, to six gallons of fuel.
50:1 ratio