Toro FP Series Operator's Manual page 13

1. Center electrode insulator
2. Side electrode
3. Air gap (not to scale)
6. Carefully install the spark plug by hand (to avoid cross
threading) until it is hand tight.
7. Tighten the spark plug an additional 1/2 turn if it is
new; otherwise, tighten it an additional 1/8 to 1/4 turn.
Important: A loose spark plug can become very
hot and can damage the engine; overtightening a
spark plug may damage the threads in the cylinder
head.
8. Connect the wire to the spark plug.
Servicing the Air Cleaner
Service Interval: Before each use or daily—Inspect the
air-cleaner elements.
Every 50 hours—Clean the air-filter elements. Clean
them more frequently in dusty operating conditions.
Every 300 hours/Yearly (whichever comes
first)—Replace the paper air-cleaner element. Replace
it more frequently in dusty operating conditions.
Removing the Air Filter
Important: Do not operate the engine without the air
filter assembly; extreme engine damage will occur.
1. Set the throttle to slow, stop the engine, and wait for
all moving parts to stop.
2. Disconnect the spark-plug wire from the spark plug.
3. Wipe clean the air filter cover (Figure 19).
Figure 18
1. Wing nut (cover)
2. Air-filter cover
3. Wing nut (filter)
4. Paper filter element
4. Remove the wing nut that secures the air-filter cover to
the carburetor and remove the cover (Figure 19).
Note: Be careful to prevent dirt and debris from
falling into the base.
5. Remove the foam filter element from the paper filter
element (Figure 19).
6. Inspect the foam element for damage.
Note: If the foam filter element if it are damaged,
replace it. If the foam element is dirty, clean it; refer to
Cleaning the Foam Filter (page 13).
7. Remove wing nut that secures the paper filter element
to the carburetor (Figure 19).
8. Remove the paper element and inspect the paper filter
element for damage and excessive amounts of dirt in
the element.
Note: Replace the paper filter element if it is damaged
or excessively dirty.
Note: Never try to clean the paper element; only
replace it.
Cleaning the Foam Filter
1. Clean the foam filter element in warm soapy water and
rinse the element the element in clean water, or clean
the foam filter element in a nonflammable solvent.
Note: Do not use gasoline to clean the foam element
because it could create a risk of fire or explosion.
2. Allow the foam filter element to completely dry.
3. Dip the foam element in clean engine oil, then squeeze
out the excess oil.
13
Figure 19
5. Foam filter element
6. Seal (rubber)
7. Carburetor base