As a test batch I have ran 15/18 and it did run better in my Echo 44 blower engine than 10/10.
I was able to tune it and get a good idle and good transition.

If there is any improvement with 15/18 there should be lots of improvement with 15/10.
At least you would know if your heading in the right direction.


I believe I'm loosing front crank bearing in it so I don't run it any more.
But I have parts on the way.