Replacing The Fuel Filter; Draining The Fuel Tank - Toro 74179 Operator's Manual

1
Figure 36
1. Spark plug wire installed
Checking the Spark Plug
Clean or replace the spark plug and set the gap every 100
hours.
1. Look at the center of the spark plug(s) (Fig. 37). If you
see light brown or gray on the insulator, the engine is
operating properly. A black coating on the insulator
usually means the air cleaner is dirty.
Important Always replace the spark plug(s) when it
has a black coating, worn electrodes, an oily film, or
cracks.
2. Clean the electrode by scraping or with a wire brush to
remove carbon deposits and wetness.
3. Check the gap between the center and side electrodes
(Fig. 37). Bend the side electrode (Fig. 37) if the gap is
not correct.
2
1
Figure 37
1. Center electrode insulator
2. Side electrode
Installing the Spark Plug
1. Install the spark plug(s). Make sure that the air gap is
set correctly.
2
m–4294
2. Spark plug
3
0.030 inch
(0.76 mm)
m–3215
3. Air gap (not to scale)
(s)
32
2. Tighten the spark plug(s) to 16 ft-lb (22 N m).
3. Push the wire(s) onto the spark plug(s) (Fig. 36).

Replacing the Fuel Filter

Replace the fuel filter after every 200 operating hours or
yearly, whichever occurs first.
Never install a dirty filter if it is removed from the fuel line.
1. Disengage the power take off (PTO), set the parking
brake, stop the engine, and remove the key.
2. Close the fuel shut-off valve on the console.
3. Squeeze the ends of the hose clamps together and slide
them away from the filter (Fig. 38).
4. Remove the filter from the fuel lines.
5. Install a new filter and move the hose clamps close to
the filter (Fig. 39).
6. Open the fuel shut-off valve on the console.
2
1
Figure 38
1. Filter

Draining the Fuel Tank

Danger
In certain conditions, gasoline is extremely
flammable and highly explosive. A fire or
explosion from gasoline can burn you and others
and can damage property.
Drain gasoline from the fuel tank when the
engine is cold. Do this outdoors in an open area.
Wipe up any gasoline that spills.
Never smoke when draining gasoline, and stay
away from an open flame or where a spark may
ignite the gasoline fumes.
M–4294
2. Hose clamp