Master FWT40 Operation Manual page 16

filter more often than specified in the MAINTENANCE SCHEDULE.
WARNING! Never use gasoline or low flammable point solvents for
cleaning the air cleaner element. A fire or explosion could result.
NOTICE! Operating the engine without an air filter element, or with a
damaged air filter element, will allow dirt to enter the engine, causing rapid
engine wear.
1. Remove the wing nut from the air cleaner cover, and remove the cover.
2. Remove the wing nut from the air filter, and remove the filter.
3. Remove the foam air filter element from the paper filter.
4. Inspect both air filter elements, and replace them if they are damage.
5. Paper air filter element: Tap the filter element lightly several times on a
hard surface to remove excess dirt, or blow compressed air through the
filter element from the inside out. Never try to brush the dirt off; brushing will
force dirt into the fibers.
6. Foam air filter element: Clean in warm soapy water, rinse, and allow to
drying thoroughly. Or clean in nonflammable solvent and allow to drying.
Dip the filter element in clean engine oil, and then squeeze out all excess
oil. The engine will smoke when started if too much oil is left in the foam.
STORAGE
The following steps should be taken to prepare your Walk-behind Power
Trowel for extended storage.
1. Close fuel shut off valve.
2. Siphon excess gasoline from tank.
3. Start engine until it stops from lack of fuel. This will use up all the fuel
in the carburetor and prevent formation of deposits due to evaporation of
fuel.
4. Remove spark plug and pour 2 oz. of SAE-30 or SAE-40 motor oil into
the cylinder. Slowly crank the engine 2 or 3 times to distribute the oil
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