Bolens BL100, BL150 Operator's Manual page 14

3. Wash the filter in detergent and water
(Fig. 23). Rinse the filter thoroughly.
Squeeze out excess water. Allow it to
dry completely.
4. Apply enough clean SAE 30 oil to
lightly coat the filter (Fig. 24).
5. Squeeze the filter to spread and
remove excess oil (Fig. 25).
6. Replace the air filter inside the air
filter/muffler cover (Fig. 22).
NOTE: Operating the unit without the air
filter and air filter/muffler cover
assembly will VOID the warranty.
Reinstalling the Air Filter/Muffler Cover
1. Place the air filter/muffler cover over
the back of the carburetor and
muffler. Align the screw holes.
2. Insert the four (4) screws into the
holes in the air filter/muffler cover
(Fig. 21) and tighten.
Do not over tighten.