Hi Rick,
Welcome to the forum.
All the 1100 mechanisms such as the Model N Diplomat required to be timed the same.
You are best to remove the search unit so you can reposition the the stop plate assembly. On the stop plate assembly you will see a 00 mark this is 100 or A1 position, in your manual you will see the position where this mark is set against (it is a step in the bracket that holds the search unit) The pins can be stiff if this is the case you need to take them out to clean them. DO NOT use any lubricant.
Regards
Alan
Alan Hood
ami-man
UK