Dolmar MS-260 U - Manual (Page 18)

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 filter (E/9) of the suction head is used to filter the fuel
taken in by the carburetor.
A periodical visual inspection of the felt filter 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 filter has hardened or is dirty or clogged, replace it.
Insufficient fuel supply can result in the admissible maximum
speed being exceeded. It is therefore important to replace the
felt filter at least every three months to ensure a good fuel sup-
ply to the carburetor.
Cleaning the muffler opening
Regularly inspect the muffler opening (E/8). When it becomes
clogged with carbon residues, carefully scrape them out with
the suitable tool.
Suction head in the fuel tank
Service
Servicing and maintenance
After about 50 tankfuls, have the brushcutter thoroughly inspected
at a DOLMAR 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 DoLMar 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 difficulty 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 filled 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
Insufficient power Several systems Engine idling Air filter dirty, carburetor adjustment
may be affected incorrect, muffler clogged, exhaust duct in
simultaneously the cylinder clogged
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