Why cant I pull the starter cord

Likely it is flooded. Try starting without choke. Move control lever into choke position, then back to start position. This sets a high idle throttle/no choke. Don't touch throttle or it will drop throttle position from high idle to idle. Set decompress and pull starter cord no more than 3x.

You may have to remove spark plug and pull start cord several times to get the excess fuel out of the cylinder and crankcase. Dry spark plug with compressed air or starter fluid. Reinstall spark plug. Pull starter cord no more than 3x. If it doesn't fire, remove plug and inspect tip. If completely dry, no fuel. If wet either no spark or it has flooded again, check for spark.

My thought would be immediately sheared flywheel key, it is easily done to not enter the key in the flywheel to the recess in the crank, the key is alloy and part of the flywheel itself.

Remove spark plug turn trimmer so that spark hole is down and pull starter rope until all old fuel is evacuated from cylinder, place spark plug back in and try. If this is not problem and especially if it is still hard to pull you may have a ring that has broken and partially hung in cyl.

could be valve needs set. if it isn't opening at the right time it wont release compression for it to start. it may be the shear key in the flywheel has sheared if you have hit something like a big rock or log or something causing it to die suddenly.

Keep in mind... Gasses compress, liquids do not. Remove the spark plug. Hold the saw so the spark plug hole is the lowest part of the engine... and pointed away from you. Pull the starter cord rapidly until all fluids are purged from the crankcase. If it happens again... rebuild or replace the carb. Good Luck !!

Have you used the blower this yaer or is this the first time??

Pulley ? What pulley?
If you mean the recoil starter pull cord is stuck it might be a simple fix. Did your machine tip over on its side?
If it did oil often flows into the cylinder. Just remove the spark plug. The recoil cord should pull easily and oil will spurt out the spark plug opening. Pull until oil stops coming out. Check your oil level. Replace your spark plug and see if she starts.

This is a problem with GC-160 and GC-190 engines on pressure washers, tillers, etc. Once they get some hours on them and as things seat in-wear in, they get to a point you can not pull the start cord. If you remove the spark plug, the engine turns easily then the valves need adjusted. The valves are set .005" to .006" off the seat. This allows enough compression release but the engine runs. I find the valves need adjusted every 25 hours, not the 100 hours Honda states.

Make sure someone hasn't run this saw without the oil in the fuel mixture. It is possible it is dry and some galling is happening. Or - if this saw is equipped with a compression bleeder (for easier starting), this could be not functioning and you're pulling through the normal compression (which can be a bit feisty!). Check for misalignment of some type having to do with the pull starter - check that the cord spool isn't rubbing on the housing when you pull. Good luck.

sound like hydraulic lock,try leaving the spark plug out and pull it quite a few times with the spark plug hole facing the ground, this should shoot the offending fluid out.
might work ?