While you wait for answers, we may have found some information which could help you.
Click here for Spark Plug Strimmer
ryobi gas trimmer?
hedge trimmer does not run unless on ckoke?
help ryobi strimmer vibration and lack of power?
how can I fix my hedgetrimmer PWR500HTA ?
New head for a RYOBI petrol strimmer?
Replacement top blade-Ryobi RHT 750?