If your machine is solid dare i say it is somthing you have done whilst cleaning it,if you removed the starter did you make sure the pulley had engaged with the starter pawls? ( slacken the cover screws rigth back and see if the cord will now pull out ) its possible you may have dropped a screw which is now trapped between the flywheel and ignition unit, worse still you may have dropped somthing down the inlet elbow and this is now jammed in the piston, take the starter off and try to turn the flwheel backwards ( clockwise ) to diss lodge anything caught in the flywheel, if the saw is still solid, then the cylinder will have to removed and the internals checked.
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If your machine is solid dare i say it is somthing you have done whilst cleaning it,if you removed the starter did you make sure the pulley had engaged with the starter pawls? ( slacken the cover screws rigth back and see if the cord will now pull out ) its possible you may have dropped a screw which is now trapped between the flywheel and ignition unit, worse still you may have dropped somthing down the inlet elbow and this is now jammed in the piston, take the starter off and try to turn the flwheel backwards ( clockwise ) to diss lodge anything caught in the flywheel, if the saw is still solid, then the cylinder will have to removed and the internals checked.