Electric Start for Craftsman 25cc Trimmer

I replaced the short block assembly for the CMXGTAMD25SC 41AD25SC793 Engine.
 

 
I reattached the electric start cover to block, but the electric start doesn't operate the piston.  After looking at it more, does the piston arm pin need to be longer to also insert into to the electric start cover opening?
 
Trying to figure out how to get the electric start to actuate.
 
Any help/comments are welcomed.
 
Michael