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Remove carb mounting bolts. Carb obsolete not available. This may help: http://www.ereplacementparts.com/ryobi-ss30-ry30002a-string-trimmer-parts-c-7931_15633_15652.html
A gasoline-powered string trimmer has cords on both sides. Most people ... In order to troubleshoot and fix a stuck cord, you have to remove the starter housing. ... Swivel each plate until it locks into position and then tighten the screw to hold it.
pull plug out tie up bail handle see if you can turn engine over by hand if you can pull hard on rope it has jamed if not .move check for locked up mover add oil to cylinder for it to turn over till its free my have to take recoil off to do this if the reciol starter pawls or lock in
if the piston rings have snapped. as they can do. it can lock the piston in place. and you will need to bore out a piston bore and put in a sleeve and new piston. worst possible thing is the crank has snapped. other possible is the generator motor has seized up making it so the engine will not move.
If this is a 2 cycle engine , which most weed eaters are, then it sounds like probably the piston is locked up inside the cylinder. Try taking the spark plug out. if it still will not pull out then take the recoil cover off. There should only be 4 screws holding it on. Once you get that off see if the string pulls out of recoil if it does then check to see if you can turn the crank on the engine.If the recoil string does not pull over then that needs to be repaired or replaced. If the crank on the engine will not turn over by hand then your engine is siezed. If you take the covers off to expose the exhaust there are 2 bolts that hold it on take those out and look inside. If you see vertical scoring on piston then your machine isnot worth fixing
Maybe you can lock up the motor and just remove the whole string head as a complete assembly...Try taking the spark plug out of the engine...turn the engine over till the piston is near bottom of the cylinder, then insert a length of clean pull rope or curtain cord or even nylon rope into cylinder..then when your turn the spool or string head the engine piston will come up and compress the material inside...effectively locking up the motor to allow removal of the spool.
Sounds like your engine overheated and is siezed. Remove the exhaust muffler and inspect the piston, it should be shiny and oily. You will see if the piston is scored or if the ring is siezed. If this your problem you can replace the piston and cylinder, but it could be expensive. Stephen.
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