I posted this before realising the thread had gone onto page 2, so I thought I better repost here. Hope this is ok
Ok, motor out, pulley off (slid of with only hand strength needed). Cases split. Photo 1 shows what I found. When lifting the motor out, I'm pretty sure I heard the components cluncking around in the bottom case, so I think it had come apart and caused my problem. I suppose I have to hope so.
Photo 2 is a closer look at the loose components. I can't see any evidence of a problem (other than the weirdly shaped hole in washer), although I don't know what holds the pieces together if the bottom case doesn't hold them up.
Photo 3 shows the end of the shaft of what I assume is the governor unit. Not sure what it should look like really. It is flattened, but not crisply.
So, how do I proceed from here?
Is where I found them irrefutable evidence of failure?
Norm, I managed to do it before your advice came through, so I didn't have the benefit of your suggestion of tipping mower. It wasn't too bad doing it in upright position, but more time consuming I guess. A worthwhile tip for the next time (hopefully not too soon).
