Ryobi RBC42FSBO User Manual page 363

TROUBLESHOOTING
Problem
Engine does not start.
Engine starts but does not
accelerate.
Engine does not reach full speed
and emits excessive smoke.
Engine starts, runs, and
accelerates but will not idle.
Blade continues to rotate at idle
speed.
Grass wraps round shaft housing
and string head.
Oil drips from silencer.
Possible cause
No spark.
No fuel.
Flooded engine.
Started rope is now harder to pull than
when it was new.
The knob is not fully tightened and
the alignment arrows are not properly
aligned.
Carburetor requires adjustment.
Oil/fuel mixture is incorrect.
Air filter is dirty.
Carburetor requires adjustment.
Carburettor requires adjustment.
Carburetor requires adjustment.
Cutting tall grass at ground level.
Operating trimmer at part throttle.
Operating trimmer at part throttle.
Oil/fuel mixture is incorrect.
Air filter is dirty.
Carburetor requires adjustment.
Solution
The spark plug may be damaged. Remove it and check
for dirt and cracks. Replace with a new spark plug.
Push primer bulb until bulb is full of fuel. If bulb does not
fill, primary fuel delivery system is blocked. Contact a
service dealer. If primer bulb fills, engine may be flooded
(see next item).
Remove spark plug, turn trimmer so spark plug hole is
aimed at the ground. Make sure lever is in the open choke
position and pull starter cord 10 to 14 times. This will
clear excess fuel from engine. Clean and reinstall spark
plug. With the throttle trigger fully depressed, pull starter
cord three times with the lever at open choke position.
If engine does not start, move choke lever to close
choke position and follow normal starting instructions in
"STARTING AND STOPPING" section. If engine still fails
to start, repeat procedure with a new spark plug.
Contact an authorised service centre.
Align the alignment arrows properly when setting the
handle bar to its working position and fully tighten the
knob.
Contact an authorised service centre.
Use fresh fuel and the correct synthetic 2-stroke oil mix.
Clean air filter. Refer to "Replacing and Cleaning Air
Filter" earlier in this manual.
Contact an authorised service centre.
Contact an authorised service centre.
Contact an authorised service centre.
Cut tall grass from the top down.
Operate trimmer at full throttle.
Operate trimmer at full throttle.
Use fresh fuel and the correct synthetic 2-stroke oil mix.
Clean per instruction in Maintenance Section.
Contact an authorised service centre.