[Mg-t] MGTF starter issue

[Howard Battan]

Hi everyone. I've got a '54 TF with the 1250 engine. Over the three+ years I 
have owned it, the starter has occasionally not engaged when the switch has 
been pulled. Normally, reaching down to the starter and giving a small turn 
to the armature on the square protrusion used to unjam the starter from the 
flywheel has been enough for the starter to work properly. Normally after 
this, the starter will work properly for a long time.

This spring the car started normally for a few days, but in the past few 
times I've driven it, it has needed this 'tweaking' more and more 
frequently. Today it would not start first try, so I again tweaked the 
armature, but it took many tries to get it to connect. After shutting the 
engine down, it was again not starting normally.

Am I correct in assuming that a likely cause of this is worn brushes and.or 
worn commutator? If so, is it an easy repair? Or should I be looking for 
something else?

Thanks for any help you can offer.

Howard Battan
'54 TF
'57 A
'79 B