Flywill,

The YS 1.70DZ will run fine on 15% Nitro. Having owned and flown OS 1.40RX's for years and YS 1.70DZ's for years, they both are VERY easy to operate, but honestly I had less problems with the 1.70's. Even changing the bearings in the OS 1.40RX you will still have problems with them sooner than you do on the YS. The 1.70's were by FAR the easiest running glow motors I've ever owned. I've now switched over to electric, and I know Randy already has the 1.40RX's and is going to run them, but I want to make sure people understand just how simple the YS's are. They do NOT need 30% nitro to run well. They are very happy on 15%.

Arch