(ET) rattling motor

[Neil Dennis <wombatt gmail com>]

Steve, I'd think I'd bet on a bottom bearing that has a worn or broken 
ball retainer.  Or is it possible the friction disc on the blade is bad 
and letting the blade do odd things.  ?

wombat

Just had an odd one on my JD motor, found the thru bolts had loosened 
enough to let the end caps turn a bit, as the motor ran "weak" I'm 
wondering if that could throw off the timing.