1:40
10.1
250ml
50ml of oil to every litre of petrol
40:1
Premix (mix oil and petrol at a certain ratio) Contact you local Yamaha dealer for the best mix.
91 octane 32-1 ratio
125ml
50:1
To mix 2-stroke oil with petrol, the standard ratio is typically 50:1, meaning 50 parts petrol to 1 part oil. For 25 litres of petrol, you would need 500 millilitres (or 0.5 litres) of 2-stroke oil. If your engine requires a different ratio, such as 40:1 or 32:1, adjust the amount of oil accordingly. Always refer to your engine's manual for the correct mixing ratio.
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