Fuel Filter Service - MTD 159cc Manual Del Operador

4. Check that the spark plug washer is in good condition and
thread the spark plug in by hand to prevent cross-threading.
5. After the spark plug is seated, tighten with a spark plug
wrench to compress the washer.
NOTE: When installing a new spark plug, tighten 1/2 turn
after the spark plug seats to compress the washer. When
reinstalling a used spark plug, tighten 1/8-1/4 turn after the
spark plug seats to compress the washer.
IMPORTANT: The spark plug must be securely tightened. An
improperly tightened spark plug can become very hot and
may damage the engine.

Fuel Filter Service

The fuel filter cannot be cleaned and must be replaced once a
year or every 100 operating hours; more often if run with old
gasoline.
1. Remove all fuel from fuel tank by running engine until it
stops from lack of fuel.
2. Remove hose clamp from fuel line and remove fuel line from
tank outlet (Figure 12).
Figure 12
3. Pull out old fuel filter from tank outlet. Replace when dirty
or damaged.
4. Grasp new fuel filter from shouldered end and insert it
completely to the shoulder into the fuel tank outlet (Figure
12).
5. Replace fuel line and hose clamp.
Clean Engine
If the engine has been running, allow it to cool for at least half
an hour before cleaning. Periodically remove dirt build-up from
engine. Clean finger guard and around muffler. Clean with a
brush or compressed air.
IMPORTANT: Do not spray engine with water to clean because
water could contaminate fuel. Using a garden hose or pressure
washing equipment can also force water into the air cleaner or
muffler opening. Water in the air cleaner will soak the paper
element, and water that passes through the element or muffler
can enter the cylinder, causing damage.
WARNING
Accumulation of debris around muffler could cause a fire.
Inspect and clean before every use.
SERVICE AND MAINTENANCE
12
Storage
Failure to use a fuel stabilizing additive or completely run
the engine until it's out of fuel before off-season storage
may result in damage to your engine's carburetor.
Subsequent damage would not be covered under the
manufacturer's warranty.
Fuel that will be stored longer than 30 days needs to be
pre-treated upon purchase with fuel stabilizer to prevent
gum and varnish from forming in the engines fuel and intake
system. Improper fuel storage can result in hard starting, no
starting, stalling and poor performance. If the fuel in your
engine deteriorates during storage, you may need to have the
carburetor, and other fuel system components, serviced or
replaced.
1. Remove all fuel from fuel tank by running engine until it
stops from lack of fuel.
WARNING
Never leave engine unattended while running.
2. Change oil. See Oil Change on page 10.
3. Remove spark plug and pour about 1/2 an ounce of engine
oil into cylinder. Replace spark plug and crank slowly to
distribute oil.
4. Clean debris from around engine, under finger guard, and
under, around and behind muffler. Touch up any damaged
paint, and coat other areas that may rust with a light film
of oil.
5. Store in a clean, dry and well ventilated area away from any
appliance that operates with a flame or pilot light, such as a
furnace, water heater, or clothes dryer. Also avoid any area
with a spark producing electric motor, or where power tools
are operated.
6. If possible, also avoid storage areas with high humidity,
because that promotes rust and corrosion.
7. Keep the engine level in storage. Tilting can cause fuel or oil
leakage.
Removing From Storage
1. Check your engine as described in Pre-Operation Check on
page 8.
2. If the fuel was drained during storage preparation, fill the
fuel tank with fresh fuel. If you keep a container of gasoline
for refueling, make certain it contains only fresh fuel.
Gasoline oxidizes and deteriorates over time, causing hard
starting.
3. If the cylinder was coated with oil during storage
preparation, the engine will smoke briefly at startup. This
is normal.
CAUTION