Ryobi RBC31SBO, Original Instructions Manual, Page: 218 / 288

TROUBLESHOOTING
IF THESE SOLUTIONS DO NOT SOLVE THE PROBLEM, CONTACT AN AUTHORISED SERVICE CENTRE.
Problem Possible cause Solution
Engine will not start 1. No spark 1. The spark plug may be damaged. Remove it and check for
dirt and cracks. Replace with a new spark plug.
2. No fuel 2. Push the primer bulb until bulb is full of fuel. If bulb does not
fill, the primary fuel delivery sys tem is blocked. Contact an
authorised service centre. If the prim er bulb fills, the engine may
be flooded. Proceed to the next item.
3. Engine is flooded 3. Remove the spark plug. Turn the product so the spark plug
hole is aimed at the ground. Rotate the choke dial to “
” position and then pull the starter cord 10 to 15 times. This
will clear the excess fuel from the en gine. Remove any fuel
splashed on the product. Clean and reinstall the spark plug.
Clean any spilled fuel and move at least 9 m away before
restarting. Pull the starter three times with choke dial at “
”. If
the en gine does not start, rotate the choke dial to “ ” position
and then repeat the normal starting pro ce dure. If the engine
still fails to start, repeat the pro ce dure with a new spark plug.
4. Starter rope now harder to pull
than when new 4. Contact an authorised service centre.
5. Old fuel 5. Only use fresh fuel mixed with recommended oil. Fuel over 30
days old may prevent the product from starting.
Engine starts but will not ac cel er ate Engine requires approximately
three minutes to warm up Allow the engine to completely warm up. If engine does not
accelerate after three minutes, an authorised service centre.
Engine starts but will only run at
high speed at half choke Carburetor requires adjustment Contact an authorised service centre.
Engine does not reach full speed
and emits ex ces sive smoke. 1. Check the lubricant fuel mixture 1. Use fresh fuel and the correct 2-stroke lubricant mix.
2. Air filter is dirty 2. Clean air filter. Refer to “Clean ing the Air Filter” in this manual.
3. Spark arrestor screen is dirty 3. Contact an authorised service centre.
Engine starts, runs, and accelerates
but will not idle Idle speed screw on carburetor
requires adjustment Contact an authorised service centre.
Line will not advance 1. Line is welded to itself 1. Lubricate with silicone spray.
2. Not enough line on the spool 2. Install more line. Refer to “Line Replacement” in this manual.
3. Line is worn too short 3. Pull the lines while alternately pressing down on and releasing
the bump head.
4. Line is tangled on spool 4. Remove the line from the spool and rewind. Refer to “Line
Replacement” in this manual.
5. Engine speed is too slow 5. Advance the line at full throttle.
Grass wraps round shaft housing
and bump head 1. Cutting tall grass at ground level 1. Cut tall grass from the top down.
2. Operating the product at part
throttle
2. Operate the product at full throttle.
Bump knob hard to turn Screw threads are dirty or damaged Clean the threads and lubricate with grease. If there is no
improvement, replace the bump knob.
Lubricant drips from muffler 1. Operating the product at part
throttle.
1. Operate the product at full throttle.
2. Lubricant/fuel mixture is dirty 2. Use fresh fuel and correct synthetic 2-stroke lubricant mix.
3. Air filter is dirty 3. Clean the air filter per instruction in “Maintenance” section.