Originally Posted by michaelingp
I'm trying out the Power Up 370 Zoom motor that others have recommended, but when I tried attaching the prop with a prop-saver it flew off at WOT. The plastic prop attachment that comes with the motor works fine. Do I just need more O rings, smaller O rings, or does this motor just turn too fast for a prop saver?
You can try different sized o-rings or double them up. I have a prop saver on my mini popwing only because it was the only adapter I had at the time that would fit, it needs double o-rings to keep the prop from flying off. Try holding the motor bell and twisting off the prop and you will get an idea of how hard (or easy) it is to make it come off. then when you add another o-ring, see how it feels.
This reminds me, I did order a collet style for my mini... I should put it on