Has anyone else had an issue, on the DL50, if stripping the prop hub threads. I have done it for the second time. Was changing props and doing the initial tightening when I heard it pop. At first I thought it might be a broken bolt, but the bolt is fine. I have ran this engine and a DA 50 for about 3 seasons now, so its not a case of not knowing how to tighten the bolts. Using the same method and tools on both engines. In fact I have changed props many times on the DA with out any issues.