If its on the compression stroke when you are pulling it will be hard to pull it, because you're fighting against the compression of the engine, make sure the valves are at the correct position and not fully closed when you are pulling.
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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 !!
remove your spark plug and try to pull over. if it still won't turn over then you will have to decarbon your head or you have vapor lock so then with plug removed pull recoil and if fuel sprays out of plug hole keep pulling over until there is no more spray from hole. clean plug off. reinstall and try starting
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.
Before taking the muffler apart... unhook the spark plug and just pull it though with the muffler removed. If it pulls normally you know you have found the problem.
If it still pulls hard...check the exhaust port of the cylinder head for 2 tiny holes (not screw holes) Some have them some don't depending upon the year of the saw. If you do find 2 small holes that appear clogged with carbon... do your best to clean them out.
There should be no need to remove the flywheel (fans?) to repair the starter cord. The starter mechanism should have come free of the left side housing so that everything you need to deal with is in that package. Did the cord break, or just pulled the cord free of the spool inside? If the cord broke, then buy a replacement cord (about 1-meter in length) of the same size and material (no cotton cord). Thread the cord into the spool center where there is a hole for the inside part of the cord and bring the end out of the hole. Melt the cord end, and then tie an overhand knot in the cord. Pull the knot back tight and proceed to wind the cord in a CCW direction around the spool until you have about most of it wound. Pull on the cord to wind the internal spring several turns and wedge the spool so that it won't unwind the spring. Wind the balance of the cord until you have about 8" left--feed that end through the outer hole and into the handle. Melt the cord end, then tie an overhand knot in it. Stuff the knot into the handle cavity and remove the spool wedge. Try the cord several times to make sure the spring pulls it back firmly and allows ample cord pull-out. Hope this helps!
well there are generalloy two issues with any motor. SPARK and FUEL
Remove the plug and hold it near the entry point of the plug hole so it earths to case. Pull starter cord and see if the plug has a stong spark. the should also be some wetness on the plu indicating fuel is pumping. Place finger over the plu hole and pull cord avoiding any spark but check the amount of pressure in cylinder. The pressure should be stronmg enough to push your finger off the hole
Replace plug and open the air intake and spray some AEROSTART into air intake pull start cord. If this does not cause it to attempt a start, I would suspect the coil is fused and will need replacing