Makita PM7650H Manuel D'instructions page 28

TROUBLESHOOTING
Before making a request for repairs, check a trouble for 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
Engine does not start
Engine stops soon
Engine speed does not increase
Engine does not stop
Run engine at idling, and set
choke lever to CLOSE.
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.
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Probable cause (malfunction)
Failure to operate primer pump
Low pulling speed of starter rope
Lack of fuel
Clogged fuel filter
Bent fuel tube
Deteriorated fuel
Excessive suction of fuel
Detached plug cap
Contaminated spark plug
Abnormal clearance of spark plug
Other abnormality of spark plug
Abnormal carburetor
Starter rope cannot be pulled
Abnormal drive system
Insufficient warm-up
Choke lever is set to "CLOSE" although
engine is warmed up
Clogged fuel filter
Contaminated or clogged air cleaner
Abnormal carburetor
Abnormal drive system
Detached throttle wire
Detached connector
Abnormal electric system
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Remedy
Push 7 to 10 times.
Pull strongly.
Feed fuel.
Clean
Straighten fuel tube
Deteriorated fuel makes starting more difficult.
Replace with new one. (Recommended replacement: 1 month)
Set throttle lever from medium speed to high speed, and pull
starter handle until engine starts.
If engine will not start still, remove spark plug, make electrode
dry, and reassemble them as they originally are. Then, start as
specified.
Attach securely
Clean
Adjust clearance
Replace
Make request for inspection and maintenance.
Make request for inspection and maintenance.
Make request for inspection and maintenance.
Perform warm-up operation
Set to "OPEN"
Clean
Clean
Make request for inspection and maintenance.
Make request for inspection and maintenance.
Attach securely
Attach securely
Make request for inspection and maintenance.