Toro TimeCutter Z420 - Fuel System Maintenance; Draining the Fuel Tank

Figure 28
1. Spark plug 2. Spark plug wire
Checking the Spark Plug
1. Look at the center of the spark plug ( Figure 29 ).
If y ou see light bro wn or g ra y on the insulator ,
the engine is operating properly . A blac k
coating on the insulator usually means the air
cleaner is dir ty .
Important: Nev er clean the spar k plug .
Al w ays r eplace the spar k plug when it has
a black coating , w or n electr odes, an oil y
film, or cracks.
2. Chec k the g ap betw een the center and side
electrodes ( Figure 29 ). Bend the side electrode
( Figure 29 ) if the g ap is not cor rect.
Figure 29
1. Center electrode insulator
3. Air gap (not to scale)
2. Side electrode
Installing the Spark Plug
1. Install the spark plug . Mak e sure that the air
g ap is set cor rectly .
2. Tighten the spark plug to 30 ft-lb (41 N ⋅ m).
3. Push the wire onto the spark plug ( Figure 28 ).
Fuel System
Maintenance
Draining the Fuel Tank
In cer tain conditions, gasoline is extr emel y
flamma ble and highl y explosi v e. A fir e or
explosion fr om gasoline can bur n y ou and
other s and can dama ge pr oper ty .
• Drain gasoline fr om the fuel tank when
the engine is cold. Do this outdoor s in
an open ar ea. W ipe up an y gasoline that
spills.
• Nev er smok e when draining gasoline,
and stay a w ay fr om an open flame or
wher e a spar k may ignite the gasoline
fumes.
1. P ark the mac hine on a lev el surface and
diseng ag e the blade control switc h.
2. Mo v e the motion control lev ers to the brak e
position, stop the engine , remo v e the k ey , and
w ait for all mo ving par ts to stop before lea ving
the operating position.
3. Close the fuel shut-off v alv e located under the
front of the fuel tank.
4. Loosen the hose clamp at the fuel filter and
slide it up the fuel line a w a y from the fuel filter
( Figure 30 ).
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