Hi Deejay, Sorry for the delay getting back to you. We have had some atrocious 40 degree days with strong winds here so have been unable to work outside. I reset everything back to the way it was. Symptoms are...when I engage the clutch lever the SB starts to move and the cutter clutch and engine shaft start spinning (as to be expected). After a few seconds or under any load, the cutter clutch outer cones continue to spin but the inner cone stops as does the engine shaft, chain, cylinder etc. I haven't touched the cutter clutch yet but thought it might be the inner cone lining. Happy to take advice from you though before I do anything. It does look like the cutter clutch is alloy.