Depends on what engine it is. Gas/petrol, diesel, twostroke.........
fossil
Basically the smaller the engine the less fuel it will use.
petrol
The same type you use in a current production diesel motor...
Depends on what engine it is. Gas/petrol, diesel, twostroke.........
Yes
15L an hour?
I have a 1972 85esl72 Johnson outboard motor and I use a 50:1 ratio.
Carbs are a means in which a motor gets an even mixture of air and fuel.
I have the same motor and use 50:1.
Mercury outboards prior to 1966 use a 24:1 fuel to oil ratio.
50:1 on slow use and 40:1 on every day use