There's no way to answer without knowing what engine you have and whether or not a block off kit has been installed. I'd suggest asking the owner. Most likely, it's 50:1 if a block off kit has been installed and variable from 50:1 (at idle) to 100:1 (at wide open throttle) if the factory oil injection system is still being used.
what is the oil gas mixture for a ysr50
32:1 gas to oil mixture
50:1
20:1
The gas oil mixture for that sled is 24:1 according to the tag on my 79 srx.
the mixture is 50:1 I would use synthetic oil
the safest mixture would be 32 to 1
40 to 50:1 with Yamalube
It is best to just do it your self trust me,but 32.1
it should be oil injected ut if its been converted to premix than its 50:1
What is the gas to oil ratio fot a 1982 Yamaha PW50? Do you need to mix it manually or does it automatically mix together by putting straight gasoline in the gas tank and straight oil in the oil tank?
The fuel mixture for a Yamaha 40 hp 2 stroke outboard engine is 50:1, gas, oil mixture. You should use new gas when you get the engine ready for the season.