RE: YS 170 DZ CDI
For the needle settings. My initial concern was perhaps a false indication of rich running due to spark plug. But with around 1 turn open, the engine smokes like anything. And it is a genuine rich run. I am running 10% oil with 20% nitro. So with only 10% oil, it may be about right with 3/4 needle. I would like to know from anyone else on this as well. What is the general consensus? I'm happy to continue running at 3/4 needle if the engine is happy.