Engine is difficult to turn over

[Jkp]

I have a swisher walk behind trimmer. Been working fine. Recently after cutting some brush it got progressively harder to pull start

 

[Ifixdit]

I have a swisher walk behind trimmer. Been working fine. Recently after cutting some brush it got progressively harder to pull start

Did you possibly hit something? May need to check and make sure the flywheel key isn't sheared.