they have oil injection. but if your are not using it, 40:1 is a good ratio.
I believe Yamaha came out with oil injection. You do not mix the oil with the gasoline - the oil is in its own reservoir and mixes automatically.
diagram oil injection system xlt 1200
If not using oil injection, the 115 hp Yamaha outboard will require a 50:1 ratio.
piston wall scorn 0r bad rings.
I have an 1980 Yamaha Enticer 250 (ET250D). Here's what the sticker under the hoods says...The oil capacity for the "Chain Case" is 15.21 oz (or 450 cc).If you are talking about the engine crankcase, there is no oil in the crankcase of a two-stroke engine. It is lubricated by the oil that is mixed into the gas.I am not sure what weight oil to use. The dealer told me to use Yamaha Chain Case Oil (but he didn't know the weight of the oil).Hope this helps!TK
i believe they have an oil injection system on these engines
300 ml
The same oil that goes into it -- typically a synthetic 2-stroke injection/premix oil.
If operating the engine without the oil injection system, supplied with the engine, use a 50:1 ratio. When using the oil injection system, no additional oil is required.
You don't. You can remove pump and pre-mix the gas.
the only oil in it is in the oil injection.If you dont use the injection the premix your fuel to oil