Bumpman,


When all else fails, RTFM (Read The Manual)...

The Cool Power you are using contains an insufficient amount of oil (17% synthetic) and an insufficient amount of nitro.

YS engines need at least 20% of each, with 30% nitro 22% oil heli fuel recommended for best performance.

This better fuel may cost more than the 15% Cool Power, but your engine's reliability (and longevity) depend on it.

Just get the right fuel! No buts, no excuses.