Toro 74402 - Replacing the Fuel Filter; Electrical System Maintenance; Servicing the Spark Plug

Note: No w is the best time to install a new fuel
filter because the fuel tank is empty .
7. Install the fuel line onto the fuel filter . Slide the
hose clamp close to the fuel filter to secure the fuel
line ( Figure 28 ).
Replacing the Fuel Filter
R e place the fuel filter after ev er y 100 operating hours
or yearly , whic hev er occurs first.
Nev er install a dir ty filter if it is remo v ed from the fuel
line .
1. P ark the mac hine on a lev el surface and diseng ag e
the blade control (PTO).
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. Squeeze the ends of the hose clamps tog ether and
slide them a w a y from the filter ( Figure 29 ).
Figure 29
1. Hose clamp 3. Filter
2. Fuel line
5. R emo v e the filter from the fuel lines .
6. Install a new filter and mo v e the hose clamps close
to the filter ( Figure 29 ).
7. Open the fuel shut-off v alv e .
Electrical System
Maintenance
Servicing the Spark Plug
R e place the spark plug after ev er y 100 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
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
1. Diseng ag e the PTO , set the parking brak e , stop the
engine , and remo v e the k ey .
2. Pull the wire off of the spark plug ( Figure 30 ).
Clean around the spark plug to prev ent dir t from
falling into the engine and potentially causing
damag e .
3. R emo v e the spark plug and metal w asher .
Figure 30
1. Spark plug 2. Spark plug wire
Checking the Spark Plug
1. Look at the center of the spark plug ( Figure 31 ).
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 31 ). Bend the side electrode
( Figure 31 ) if the g ap is not cor rect.
26