Troubleshooting - Ryobi RCS4640N Manual

TROUBLESHOOTING

Problem
Engine will not start (Make
sure ignition switch is in
start position "I").
Engine starts but will not
accelerate properly.
Engine starts but will not run
properly at high speed.
Engine does not reach
full speed and/or emits
excessive smoke.
Engine starts, runs, and
accelerates but will not idle.
Engine starts and runs, but
chain is not rotating.
English (Original Instructions)
Possible cause
No spark.
Flooded engine.
Carburettor requires "L" (Low
jet) adjustment.
Carburettor requires "H" (High
jet) adjustment.
Check lubricant fuel mixture.
Air filter dirty.
Spark arrester screen dirty.
Carburettor requires "H" (High
jet) adjustment.
Carburettor requires adjustment.
Chain lubricant tank empty. That
fuel tank is filled.
Check chain tension for
overtight condition.
Solution
The spark plug could be cracked or damaged.
Replace the old spark plug with a new one and
try to start again. If engine will still not start,
return the product to a service dealer for further
checking.
With the ignition switch off, remove spark plug
from the engine and the spark plug boot. Move
choke lever to run position (pushed in completely)
and pull starter cord 15 to 20 times. This will clear
excess fuel from engine. Clean and reinstall spark
plug. Set ignition switch to run (I) position. Push
and fully release primer bulb 10 times. Pull starter
three times with choke lever at run. If engine does
not start, move choke lever to choke and repeat
normal starting procedure. If engine still fails to
start, repeat procedure with a new spark plug.
Contact a service dealer for carburettor
adjustment.
Contact a service dealer for carburettor
adjustment.
Use fresh fuel and the correct 2-stroke lubricant
mix ratio.
Clean air filter. Refer to "Maintenance – cleaning
the air filter" earlier in this manual.
Clean spark arrester screen. Refer to
"Maintenance – cleaning the spark arresting
silencer" earlier in this manual.
Contact a service dealer for carburettor
adjustment.
Turn idling speed screw "T" clockwise to increase
idling speed. If chain turns at idle, turn idling
speed screw "T" anticlockwise to decrease
speed. Wear protective equipment and observe
all safety instructions.
Lubricant tank should be filled every time.
Tension chain per instructions in "Maintenance –
adjusting the chain tension" earlier in this manual.
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