Hard to pull starter cord, won't start
I have a Briggs and Stratton p02-0116-f1 engine on my Husqvarna push mower, when I pull the cord it starts off easy for a couple inches, then gets very hard while air comes out of the carburator, then near the end of the pull it is nice and easy.
In addition when I removed the sparkplug the cord was easy to pull so the engine isn't seized.
Keep in mind:
I have checked that the brake comes off the flywheel when the bar is pushed down
The flywheel key is not sheered
Anything helps, thank you in advance.