Spark Plug; Fuel Filter - Toro 74176 Operator's Manual

Spark Plug

Check the spark plug(s) after every 100 operating hours.
Make sure the air gap between the center and side
electrodes is correct before installing the spark plug. Use a
spark plug wrench for removing and installing the spark
plug(s) and a gapping tool/feeler gauge to check and
adjust the air gap. Install a new spark plug(s) if necessary.
Type: Champion RCJ8Y (or equivalent) Air Gap: 0.040
in. (1.0 mm)
Removing the Spark Plug
1. Disengage the power take off (PTO), set the parking
brake, and turn the ignition key to "OFF" to stop the
engine. Remove the key.
2. Pull the wire(s) off the spark plug(s) (Fig. 41). Now
clean around the spark plug(s) to prevent dirt from
falling into the engine and potentially causing damage.
3. Remove the spark plug(s).
1
Figure 41
1. Spark plug wire installed
Checking the Spark Plug
1. Look at the center of the spark plug(s) (Fig. 42). 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
Never clean the spark plug(s). Always
replace the spark plug(s) when it has a black coating,
worn electrodes, an oily film, or cracks.
(s)
2
2. Spark plug
32
2. Check the gap between the center and side electrodes
(Fig. 42). Bend the side electrode (Fig. 42) if the gap is
not correct.
2
1
Figure 42
1. Center electrode insulator
2. Side electrode
Installing the Spark Plug
1. Install the spark plug(s). Make sure the air gap is set
correctly.
2. Tighten the spark plug(s) to 11 ft-lb (15 N.m).
3. Push the wire(s) onto the spark plug(s) (Fig. 41).

Fuel Filter

Replace the fuel filter after every 200 operating hours or
yearly, whichever occurs first.
Replacing the Fuel Filter
Never install a dirty filter if it is removed from the fuel
line.
1. Disengage the power take off (PTO), set the parking
brake, and turn the ignition key to "OFF" to stop the
engine. Remove the key.
2. Close fuel shut-off valve on console.
3. Squeeze the ends of the hose clamps together and slide
them away from the filter (Fig. 43).
4. Remove the filter from the fuel lines.
5. Install a new filter and move the hose clamps close to
the filter (Fig. 44).
3
0.040 in.
(1.0 mm)
m–3215
3. Air gap (not to scale)
(s)