Ryobi RBC254FSB Manuel D'utilisation page 30

Oil drips from silencer.
English(Original instructions)
Operating trimmer at part throttle.
Check oil/fuel mixture.
Air lter dirty.
Carburetor requires adjustment.
Operate trimmer at full throttle.
Use fresh fuel and the correct synthetic 2-stroke
oil mix.
Clean per instruction in Maintenance Section.
Contact a servicing dealer.
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