18
Trouble shooting
After about 50 operating hours the gear box (
D/8
) should be
checked by a OLMAR service centre, and if necessary re-
grease.
The service centre will add the exact amount of grease, as
excessive grease will lead to overheating of the gearbox.
Lubricating the gear box
The felt
fi
lter (
E/9
) of the suction head is used to
fi
lter the fuel
taken in by the carburetor.
A periodical visual inspection of the felt
fi
lter should be con-
ducted. For this purpose open the tank cap, and use a wire
hook to pull out the suction head through the tank opening. If
the
fi
lter has hardened or is dirty or clogged, replace it.
Insuf
fi
cient fuel supply can result in the admissible maximum
speed being exceeded. It is therefore important to replace the
felt
fi
lter at least every three months to ensure a good fuel sup-
ply to the carburetor.
Cleaning the muf
fl
er opening
Regularly inspect the muf
fl
er opening (
E/8
). When it becomes
clogged with carbon residues, carefully scrape them out with
the suitable tool.
Suction head in the fuel tank
Servicing and maintenance
After about 50 tankfuls, have the brushcutter thoroughly inspected
at a MAKITA service centre.
No maintenance and adjustment work not described in this
manual may be performed by the user. Al such work must
be performed only by a MAKITA service centre.
Fault System
Observation Cause
Engine will not start or
Ignition system
Ignition spark OK
Fault in fuel supply or compression system,
starts only with dif
fi
culty
mechanical defect
No ignition spark
STOP switch is depressed, wiring fault or short
circuit, spark plug or connector defective,
ignition module faulty
Fuel supply
Fuel tank full
Incorrect choke position, carburetor defective,
suction head dirty, fuel supply line bent or
interrupted
Compression
Inside of engine
Cylinder bottom gasket defective, crankshaft
system
seals damaged, cylinder or piston rings worn
Outside of engine
Poor sealing of spark plug
Mechanical fault
Starter not engaging
Broken starter spring, broken parts inside engine
Warm start problems
Carburetor
Tank
fi
lled
Incorrect carburetor setting
Ignition spark OK
Engine starts but
Fuel supply
Tank full
Incorrect idle speed, suction head or
dies immediately
carburetor dirty
Fuel tank vent defective, fuel supply line
interrupted, cable or STOP switch faulty
Insuf
fi
cient power
Several systems
Engine idling
Air
fi
lter dirty, carburetor adjustment
may be affected
incorrect, muf
fl
er clogged, exhaust duct in
simultaneously
the cylinder clogged
D
E
Service
