Ryobi RPHD43O Operator's Manual page 21

PROBLEM POSSIBLE CAUSE
The auger
attachment
turns at idle.
Oil drips from
muffler.
Idle speed is set too
high.
Gearbox clutch is
inoperable.
Check oil / fuel
mixture.
Air filter dirty.
SOLUTION
Turn the idle speed screw counter clockwise to
reduce the idle RPM and stop the auger attachment.
Contact a service dealer for adjustment and
discontinue use until the repair is made. Serious
personal injury may result from the auger
attachment turning at idle.
Use fresh fuel and the correct synthetic 2-stroke oil
mix.
Clean per instruction in Maintenance Section.
19