was wondering, I can find the bottom screw to drain the bottom end oil but can't seem to find the top screw that releases pressure and allows it to drain. Does this engine even have one? As well I want to take the prop off but it seems to have a release ring below the cone with 8 or more taps that need to be pressed at the same time to get the cone off is there a tool that you need in order to do this or am I going about it the wrong way?