Troubleshooting - Toro 51958 Operator's Manual

Troubleshooting

Problem
Engine will not start
Engine does not reach full speed
and emits excessive smoke
Line will not advance when using
automatic line lengthening
Grass wraps around the trimmer
head assembly and the attachment
shaft
Lubricant drips from muffler
If problem persists after trying the above solutions, contact customer service or a qualified service center for assistance.
NOTICE:
As the equipment owner, you are responsible for the performance of the required maintenance listed in the Maintenance
section. It is recommended that you retain all receipts covering maintenance on your equipment. Neglecting or failing to
perform the required maintenance may increase emissions, decrease fuel efficiency, degrade performance, cause irrevers-
ible engine damage and/or void your warranty.
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Possible Cause
1. No spark
2. No fuel
3. Flooded engine
4. Starter cord pulls harder now
then when new
1. Check lubricant/fuel mixture
2. Air filter is dirty
3. Spark arrestor screen is dirty
1. Line welded to itself
2. Not enough line on the spool
3. Line worn too short
4. Line tangled on spool
5. Engine speed too slow
1. Cutting tall grass at ground
level
2. Operating the product at part
throttle
1. Operating the product at part
throttle
2. Check lubricant/fuel mixture
3. Air filter is dirty
Solution
1. 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.
2. Push primer bulb until the bulb is full of
fuel. If the bulb does not fill, the pri-
mary fuel delivery system is blocked. If
the primer bulb fills, the engine may be
flooded. (See next item.)
3. 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 proce-
dure with a new spark plug.
4. Contact a qualified service dealer.
1. Use fresh fuel and the correct 2-cycle
lubricant mix.
2. Clean the air filter.
3. Clean the spark arrestor.
1. Lubricate with silicone spray.
2. Install more line.
3. Pull line while alternately pressing down
on and releasing the retaining cap.
4. Remove line from spool and rewind.
5. Advance line at full throttle.
1. Cut tall grass from the top down.
2. Operate the product at full throttle.
1. Operate the product at full throttle.
2. Use fresh fuel and the correct 2-cycle
lubricant mix.
3. Clean the air filter.
Troubleshooting