Toro 74603 - Spark Plug; Fuel System Maintenance; Draining the Fuel Tank

Spark Plug
Chec k the spark plug(s) after ev er y 200 operating
hours . Mak e sure that the air g ap betw een the
center and side electrodes is cor rect before
installing the spark plug . Use a spark plug wrenc h
for remo ving and installing the spark plug(s) and a
g apping tool/feeler g aug e to c hec k and adjust the
air g ap . Install a new spark plug(s) if necessar y .
T ype: Champion R C12Y C (or equi v alent)
Air Gap: 0.030 inc h (0.76 mm)
Removing the Spark Plug(s)
1. Diseng ag e the blade control switc h and mo v e
the control lev ers to the neutral loc k ed position
and apply the parking brak e .
2. 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. Pull the wire(s) off of the spark plug(s)
( Figure 27 ). Clean around the spark plug(s) to
prev ent dir t from falling into the engine and
potentially causing damag e .
4. R emo v e the spark plug(s) and metal w asher .
Figure 27
1. Spark plug wire 2. Spark plug
Checking the Spark Plug
1. Look at the center of the spark plug(s)
( Figure 28 ). 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(s). Al w ays r eplace the spar k plug(s)
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 28 ). Bend the side electrode
( Figure 28 ) if the g ap is not cor rect.
Figure 28
1. Center electrode insulator
3. Air gap (not to scale)
2. Side electrode
Installing the Spark Plug(s)
1. Install the spark plug(s). Mak e sure that the
air g ap is set cor rectly .
2. Tighten the spark plug(s) to 30 ft.-lb . (41 N ⋅ m).
3. Push the wire(s) onto the spark plug(s)
( Figure 27 ).
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.
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