Hi all,
New to the lawn mower restorations

I am currently working on a kirby HK30 that has no spark

what I have done so far is changed the spark plug and set gap, inspected the ignition module for wire damage and cleaned the points. I went to reassemble the engine, flywheel ect and tried to start it but the pull cord won't budge this wasn't an issue before I did any work? Anyone have any ideas on what I have done wrong? I have pulled it apart several times now and refitted but no change. Seems like the flywheel won't spin the engine wouldn't of seized would it?
Thanks Teebag