b) Paper fi lter element: knock the core againt a solid plane to get rid of accumulated dust or blow out
EN
dust from inside to outside with high-pressure air fl ow (not more than 30 psi). Never clean with a brush,
as brushing may force the dust into the core fi ber. If the core is extremely fi lthy, replace it with a new
one.
c) Clean the dust-collecting cup: turn off the three special semi-round screws and re move the cup, wash
parts with water and then dry up. Install it to original position.
CAUTION
• The dust-collecting core should be so installed to make
sure that the projection of air inlet just fi ts into the groove
in the pre-air cleaner cover.
• Install the air guide in correct order.
Semi-dry type (Fig. 25)
a) Unscrew the wing nut, remove the air cleaner housing, then take out
the fi lter element.
b) Clean the fi lter element with non-fl ammable or high fl ash-point
cleansing solvents, and dry it up.
c) Soak the core in clean engine oil until saturated. Squeeze excess iol,
otherwise the engine will discharge smoke in starting stage.
d) Install the parts to original position.
Oil bath type (Fig. 26)
a) Remove the wing nut and air cleaner housing, and take out the fi lter
element. Check if both the cores are damaged. If any, replace it with
new one.
b) Clean the bores with home detergents(or high fl ash-point cleansing
solvents) and warm water,and dry them up.
c) Soak them in clean engine oil,until saturated. Squeeze excess oil, or
the engine will discharge smoke in starting stage.
d) Empty the air cleaner housing ofoil, clear away the dust inside with
non-fl ammable or high fl ash-point cleansing solvents, and dry it up.
e) Fill the air cleaner housing with the specifi ed engine oil to the standard
oil level mark.
f ) Fit the parts to original position.
3. WASHING OF DEPOSIT CUP (Fig. 27)
Set the fuel switch at "OFF", remove the deposit cup and O-ring.
Wash them in non-fl ammable or high fl ash-point cleansing
solvents, and then dry them up, at last, carry out reinstallation. Set
the fuel switch to "ON" and check for leaks.
WARNING
• Gasoline is extremely fl ammable and explosive in
certain conditions. Keep cigarette, sparks and open
fl ames away.
• After reinstalling the deposit cup, check it for leakage and
make sure the area around the engine is dry enough.
4. SPARK PLUG (Fig. 28)
Spark plug type: BP6ES, BPR6ES (NGK) or NHSPLD F6RTCU.
Proper spark plug clearance ensures the engine's normal running
under no deposit around the spark plug.
a) Remove the spark plug by means of spark plug wrench.
WARNING
Be careful not to touch the muffl er during or just
after running the engine.
34
Wing nut
Air cleaner
housing
Filter
element
fi g. 25
Wing nut
Air cleaner
housing
Filter
element
fi g. 26
O-ring
Deposit cup
fi g. 27
Spark plug wrench
fi g. 28