OK. I checked prop blade to trim anode and got fluctuating 1000 ohms. Prop blade to prop shaft and nut fluctuating 12,000 ohms. Prop shaft to anode and hull .5 ohms. All jumpers are good. Something is insulating the prop from the shaft. Isn't the core of all props a sacrificial rubber material that can be spun if it hits a rock or something to prevent lower end damage? How do you common up that if that's the case? How important is this one weak link to the overall scheme of things?