Makita ER2550LH, Original Instruction Manual

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19
TROUBLESHOOTING
Before making a request for repairs, check for trouble by yourself. If any abnormality is found, control your machine according to the description
of this manual. Never tamper or dismount any part contrary to the description. For repairs, contact Authorized Service Agent or local dealership.
State of abnormality Probable cause (malfunction) Remedy
Engine does not start
Failure to operate primer pump Push 7 to 10 times
Low pulling speed of starter rope Pull strongly
Lack of fuel Feed fuel
Clogged fuel filter Clean
Broken fuel tube Straighten fuel tube
Deteriorated fuel Deteriorated fuel makes starting more difficult.
Replace with new fuel. (Recommended
replacement: 1 month)
Excessive suction of fuel Set throttle lever from medium speed to high
speed, and pull starter handle until engine
starts.
Once engine starts, nylon cutting
head starts rotating. Pay full attention to
nylon cutting head.
If engine will not start still, remove spark plug,
make electrode dry, and reassemble them as
they originally are. Then, start as specified.
Detached plug cap Attach securely
Contaminated spark plug Clean
Abnormal clearance of spark plug Adjust clearance
Other abnormality of spark plug Replace
Abnormal carburetor Make request for inspection and maintenance.
Starter rope cannot be pulled Make request for inspection and maintenance.
Abnormal drive system Make request for inspection and maintenance.
Engine stops soon
Engine speed does not increase
Insufficient warm-up Perform warm-up operation
Choke lever is set to “CLOSE” although
engine is warmed up. Set to “OPEN”
Clogged fuel filter Clean
Contaminated or clogged air cleaner Clean
Abnormal carburetor Make request for inspection and maintenance.
Abnormal drive system Make request for inspection and maintenance.
The cutting attachment does not rotate.
Stop engine immediately!
The cutting attachment is not tightened
securely. Tighten the cutting attachment securely.
A twig is caught between the cutting
attachment and the protector. Remove the foreign matter.
The drive system does not work properly. Ask Makita authorized service center to
inspect and repair it.
The unit vibrates abnormally.
Stop engine immediately!
The cutting attachment is broken. Replace the cutting attachment with new one.
The cutting attachment is not tightened
securely. Tighten the cutting attachment securely.
One end of nylon cutting cord has been
broken and the nylon cutting head got
unbalanced. Feed the nylon cutting cord with tapping the
nylon cutting head on the ground.
The drive system does not work properly. Ask Makita authorized service center to
inspect and repair it.
The cutting attachment does not stop.
Stop engine immediately!
The power unit does not work properly. Refer to the instruction manual of the power
unit.
Engine does not stop
Run engine at idling, and set choke lever
to CLOSE
Detached connector Attach securely
Abnormal electric system Make request for inspection and maintenance.
The nylon cutting cord does not feed. The cord is used up or tangled in the spool. Rewind the cord.
The nylon cutting cord is not cut off at the
correct length. The cord cutter on the protector is damaged
or missing. Ask Makita authorized service center to
replace the cord cutter.
The cord extends past the protector. Rewind the cord.
When the engine does not start after warm-up operation:
If there is no abnormality found for the check items, open the throttle by about 1/3 and start the engine.