10.1
250ml
50ml of oil to every litre of petrol
Premix (mix oil and petrol at a certain ratio) Contact you local Yamaha dealer for the best mix.
40:1
91 octane 32-1 ratio
125ml
50:1
A non oil injected, 1990 model, 2 stroke Yamaha outboard requires a 50:1 ratio, one pint of 2 cycle oil, to six gallons of fuel.
two stroke pre mix : say ratio of oil : petrol is 1 : 20, then say if you have 10 litres of petrol, you need to add 0.5 litres of oil
The mixture ratio for Yamaha outboards is 50:1 gas/two stroke oil. That is approximately one pint of gasoline to a plastic coke bottle cap full of two stroke oil.