Greetings,

I have been flying my Legacy for one year now and have accumulated 80 hours flight time.  My Legacy is equipped with a Continental IO-550-N engine.

At hour 70, I removed the ISKRA starter as a preemptive measure to preserve the starter adapter.  I replaced it with a SkyTec starter.  All has been well for the next 10 hours.  However, now at 80 hours, it appears I am getting starter slippage.  While starting the engine, I'll get a couple blades of rotation  --- and then the prop will stop turning (at a compression stroke), but it sounds as if the starter motor is continuing to turn with full power.  Stop cranking.  Then resume, I'll get a few more blades of rotation, and then the prop will stop turning, while the starter motor continues with full power. 

Is this what a failed starter adapter sounds like?  Request advice on how to proceed from other Legacy, ES, and IV, (equipped with Continental IO-550-N) owner/builders who have had similar experience and successfully resolved the issue

Thank you,

John