Join Date: Jul 2007
Location: Northern Virginia
Thanked 6 Times in 6 Posts
Rep Power: 9
Getting the Shaft?
How smooth should a nice new drive train spin--by hand and under power? Last spring I got a new drive shaft, split coupling, cutlass bearing and PSS dripless seal installed by the local Yanmar shop. My goal was to finally have an aligned drive train, taking care of some bad work done for the PO.
While the shaft has been somewhat smoother than before, I was expecting a nicely spinning shaft with very little wobble, but there is quite a bit of runout (to my ignorant eye), and I even see some "wobble" in the PSS metal collar when I simply turn the shaft by hand. Also, I've now got a tick tick tick sound in the shaft somewhere that is pretty annoying.
I already had the shop come back to check the alignment and they said they did have to change things some, but it seems no better to me. Still has wobble, still makes noise.
Am I expecting too much, or is something wrong in there? How smooth should a 1" shaft spin with a Yanmar 2GM20F at one end and a 2-blade prop at the other? Should the PSS turn in a lopsided way when I turn the shaft by hand? Forgot to mention, there's a Drivesaver between the coupling and tranny--they pulled that and went metal to metal to do the alignment, and then put it back.
2000 Beneteau 331
Northern Chesapeake Bay
Ambition is a poor excuse for not having enough sense to be lazy ~ Steven Wright