Dolmar MS290.4U - TROUBLESHOOTING

31 ENGLISH
TROUBLESHOOTING
Beforeaskingforrepairs,conductyourowninspectionrst.Ifyoundaproblemthatisnotexplainedinthemanual,
donotattempttodismantlethemachine.Instead,askDolmar/MakitaAuthorizedServiceCenters,alwaysusing
Dolmar/Makitareplacementpartsforrepairs.
State of abnormality Probable cause (malfunction) Remedy
Engine does not start. Failure to operate primer pump Push 7 to 10 times.
Pulling starter rope too slowly Pullthestarterropermly.
Lack of fuel Add fuel.
Cloggedfuellter Unclogandcleanthefuellter.
Bent fuel tube Straighten fuel tube.
Deteriorated fuel Replace with new fuel.
Excessivesuctionoffuel Removethesparkpluganddrytheelectrode.
Detached plug cap Attach the plug cap securely.
Contaminated spark plug Clean the spark plug.
Abnormal clearance of spark plug Adjusttheclearance.
Other abnormality of spark plug Replace with a new one.
Abnormal carburetor Contactanauthorizedservicecenterforrepairs.
Starter rope cannot be pulled Contactanauthorizedservicecenterforrepairs.
Abnormaldrivesystem Contactanauthorizedservicecenterforrepairs.
Engine stops soon after starting.
Engine speed does not increase.
Insufcientwarm-up Provideenoughtimetowarmup.
Chokeleverisintheclosedposition
although the engine is warmed up.
Setthechokelevertotheopenposition.
Cloggedfuellter Cleanorreplacethefuellter.
Contaminated or clogged air cleaner Clean the air cleaner.
Abnormal carburetor Contactanauthorizedservicecenterforrepairs.
Abnormaldrivesystem Contactanauthorizedservicecenterforrepairs.
Cutting tool does not rotate.
Stop engine immediately.
Cutting tool is loosely attached. Tighten the cutting tool securely.
Cutting tool caught on foreign matter. Removeforeignmatter.
Abnormaldrivesystem Contactanauthorizedservicecenterforrepairs.
Mainunitvibratesabnormally.
Stop engine immediately.
Broken, bent or worn cutting tool Replace the cutting tool.
Cutting tool is loosely attached. Tighten the cutting tool securely.
Cutting tool is incorrectly attached. Attach the cutting tool properly.
Abnormaldrivesystem Contactanauthorizedservicecenterforrepairs.
Cutter blade does not stop imme-
diately.
Stop engine immediately.
Idling speed is too high. Adjusttheidlingspeed.
Detached throttle wire Attach the throttle wire securely.
Abnormaldrivesystem Contactanauthorizedservicecenterforrepairs.
Engine does not stop.
Run engine at idle and set the
chokelevertotheclosedposition.
Stop button malfunction Contactanauthorizedservicecenterforrepairs.