RE: YS 61 on the pipe...prop?
Except that this is the manufacturers support forum for YS engines. I note that you are new to the RCU forums. Please read the guidelines for posting on the manufacturers forum. Unless you are the thread starter, or myself, you are not supposed to post on any question. It keeps the threads size from getting unmanageable.
If you want to start your own thread on whatever subject, be my guest.