Dolmar MS290.4U - Cleaning the air cleaner; Checking the spark plug

21 ENGLISH
Cleaning the air cleaner
NOTICE: When working under extremely dusty
conditions, clean the lter several times a day.
Dirty elements reduce engine power and make the
enginedifculttostart.
NOTICE: Remove oil on the elements. The oil on
the air cleaner may come outside.
NOTICE: Do not put the elements on the ground
or in a dirty location. The elements can pick up dirt
or debris that can damage the engine.
NOTICE: Never use fuel to clean the elements.
Doing so will damage the parts.
Interval for cleaning and inspection:Daily(every10
operating hours)
2
3
5
1
4
►1. Knob bolt 2.Aircleanercover
3. Element(sponge) 4. Element(felt) 5. Air cleaner
plate
To clean the air cleaner, perform the following
procedures.
1. Turnthechokeleverfullytotheclosedpositionto
keep the carburetor free from dust or dirt.
2. Loosentheknobboltandremovetheaircleaner
cover.
3. Removetheelementsandremovedirtonthemby
tapping.
Iftheelementsareheavilycontaminated,soakthemin
warm water or in a water-diluted neutral detergent. Do
notsqueezeorrubtheelementswhenwashing.
After washing the elements, dry them completely.
Otherwiseitwillbedifculttostarttheengine.
4. Wipe out any oil adhering around the air cleaner
coverandtheaircleanerplateusingacloth.
5. Fit the element(sponge) into the inside of the air
cleanercover,andtheelement(felt)intotheaircleaner
plate.
6. Mounttheaircleanercoverandtightentheknob
bolt.
Checking the spark plug
CAUTION: Do not operate the tool without
the spark plug cover. Touching the plug cap while
the engine is running can cause an electrical shock.
CAUTION: Do not touch the spark plug cap
while the engine is running. Doing so can cause an
electrical shock.
CAUTION: Check the spark plug cord reg-
ularly. If the spark plug cord is damaged or torn,
replace it. Not doing so may cause an electrical
shock.
NOTICE: When removing the spark plug, clean
the spark plug and cylinder head rst, so that no
dirt, sand, etc., will enter the cylinder.
NOTICE: Remove the spark plug after the
engine has cooled down in order to avoid damag-
ing the threaded hole in the cylinder.
NOTICE: Always use the supplied box wrench
to remove or to install the spark plug.
NOTICE: Install the spark plug properly into the
threaded hole. If installed at an angle, the threaded
hole in the cylinder will be damaged.
Interval for cleaning and inspection: Weekly
To check the spark plug, perform the following
procedures.
1. Openthesparkplugcoverandremovetheplug
cap.
1
2
3
►1.Cover2. Screw 3. Plug cap
2. Clean the spark plug and cylinder head.