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TROUBLESHOOTING
PROBLEM CAUSE REMEDY
Engine will not start. No spark.
No fuel.
Engine is flooded.
Starter rope pulls harder now
than when new.
Check spark. Remove spark plug. Reattach the spark plug cap and lay
spark plug on metal cylinder. Pull the starter rope and watch for spark at
spark plug tip. If there is no spark, repeat test 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 servicing dealer. If primer
bulb fills, engine may be flooded, proceed to next item.
Pull starter three times with choke lever at “RUN”. If engine does not
start, move choke lever to “START” and repeat normal starting pro-
cedure. If engine still fails to start, repeat procedure with a new spark
plug.
Contact a servicing dealer.
Engine starts but will not
accelerate.
Engine requires approximately
three minutes to warm up.
Allow engine to completely warm up. If engine does not accelerate
after three minutes, contact a servicing dealer.
Engine starts but will only
run at high speed at half
choke.
Carburetor requires adjustment. Contact a servicing dealer.
Engine does not reach
full speed and emits
excessive smoke.
Check oil fuel mixture.
Air filter is dirty.
Spark arrestor screen is dirty.
Use fresh fuel and the correct 2-cycle oil mix.
Clean air filter. Refer to “Replacing and Cleaning Air Filter” earlier in
this manual.
Contact a servicing dealer.
Engine starts, runs, and
accelerates but will not
idle.
Idle speed screw on carburetor Turn idle speed screw clockwise to increase idle speed.
Bar and chain running
hot and smoking.
Check chain tension for overtight
condition
Chain oil tank empty
Tension chain. Refer to “Chain Tension” earlier in this manual.
Check oil tank.
Motor runs, but chain is
not rotating.
Chain tension too tight.
Check guide bar and chain as-
sembly.
Check guide bar and chain for
damage.
Retension chain. Refer to “Chain Tension” earlier in this manual.
Refer to “Replacing the Bar and Chain” earlier in this manual.
Inspect guide bar and chain for damage.
String won’t advance String is welded to itself.
Not enough string on spool.
String is worn too short.
String is tangled on spool.
Engine speed is too slow.
Lubricate string with silicone spray.
Install more string. Refer to “String Replacement” earlier in this
manual.
Pull strings while alternately pressing down on and releasing spool
retainer.
Remove string from spool and rewind. Refer to “String Replacement”
earlier in this manual.
Advance string at full throttle.
Spool retainer hard to
turn
Screw threads are dirty or
damaged.
Clean threads and lubricate with grease - if no improvement, replace
the spool retainer.
Grass wraps around
driveshaft housing and
string head
Cutting tall grass at ground
level.
Operating trimmer at part
throttle.
Cut tall grass from the top down to prevent wrapping.
Operate trimmer at full throttle.