25
Troubleshooting
Troubleshooting
Problem
Possible Cause
Solution
Engine will not start
1. Switch set to the O (OFF)
position.
1. Set switch to the
I
(ON) position.
2. No spark
2. Remove the spark plug. Reattach the spark plug
cap and lay the spark plug on the metal cylinder.
Pull the starter cord and watch for a spark at the
spark plug tip. If there is no spark, repeat the test
with a new spark plug.
3. No fuel
3. Push primer bulb until the bulb is full of fuel. If the
bulb does not fill, the primary fuel delivery system
is blocked. If the primer bulb fills, the engine may
be flooded. (See next item.)
4. Flooded engine
4. Remove the spark plug. Turn the product so that
the spark plug hole is aimed at the ground. Make
sure the choke lever is set to
RUN
and pull the
starter cord 10 to 14 times. This clears excess fuel
from the engine. Clean and reinstall the spark plug.
With the trigger fully depressed, pull the starter
cord 3 times. If the engine does not start, set the
choke lever to
FULL
and follow normal starting
instructions. If the engine still fails to start, repeat
the procedure with a new spark plug.
5. Starter cord pulls harder
now than when new
5. Contact an authorized service dealer.
Engine does not reach full speed
and emits excessive smoke
1. Check oil fuel mixture
1. Use fresh fuel and the correct 2-cycle oil mix.
2. Air filter is dirty
2. Clean the air filter.
3. Spark arrestor screen is
dirty
3. Clean the spark arrester.
Line will not advance when us-
ing automatic line lengthening
1. Line welded to itself
1. Lubricate with silicone spray.
2. Not enough line on the
spool
2. Install more line.
3. Line worn too short
3. Pull line while alternately pressing down on and
releasing the retaining cap.
4. Line tangled on spool
4. Remove line from spool and rewind.
5. Engine speed too slow
5. Advance line at full throttle.
Retaining cap hard to turn when
using automatic line lengthening
Screw threads are dirty or
damaged
Clean the threads and lubricate with grease. If this does
not solve the problem, replace the retaining cap.
Grass wraps around the trimmer
head assembly and the attach-
ment shaft
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.
Oil drips from muffler
1. Operating the product at
part throttle
1. Operate the product at full throttle.
2. Check oil/fuel mixture
2. Use fresh fuel and the correct 2-cycle oil mix.
3. Air filter is dirty
3. Clean the air filter.
Summary of Contents for 51952
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