Toro 74433 - Fuel System Maintenance; Draining the Fuel Tank

Figure 37
1. Spark plug wire 2. Mufer
4. R emo v e the spark plug and metal w asher .
Checking the Spark Plug
1. Look at the center of the spark plug ( Figure 38 ).
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 38 ). Bend the side electrode
( Figure 38 ) if the g ap is not cor rect.
Figure 38
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 37 ).
4. Close the access panel and tighten the fasteners
to secure it shut.
Important: Al w ays mak e sur e the panel
is r eplaced and secur ed with the f astener s
bef or e operating the machine. Operating
the machine with the access panel open
w ould allo w clippings and other de bris
entering the engine compar tment possibl y
dama ging the machine.
Fuel System
Maintenance
Draining the Fuel Tank
In cer tain conditions, fuel is extr emel y
flamma ble and highl y explosi v e. A fir e or
explosion fr om fuel can bur n y ou and other s
and can dama ge pr oper ty .
• Drain fuel fr om the fuel tank when the
engine is cold. Do this outdoor s in an
open ar ea. W ipe up an y fuel that spills.
• Nev er smok e when draining fuel, and
stay a w ay fr om an open flame or wher e a
spar k may ignite the fuel 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 ( Figure 39 ).
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