Servicing The Fuel System; Servicing The Spark Plugs - Toro 07253 Operator's Manual

1. Park the machine on a level surface, set the parking
brake, turn the ignition off, and remove the key.
2. Loosen the starter generator pivot bolt (Fig. 37).
2
10 lb.
Figure 37
1. Generator pivot bolt
3. Adjust the jam nut on the starter rod (Fig. 37) until the
belt flexes 1/4 inch with 10 lb. of force.
4. Tighten the starter generator pivot bolt (Fig. 37).

Servicing the Fuel System

Fuel Lines and Connections
Check the lines and connections every 400 hours or yearly,
whichever occurs first. Inspect them for deterioration,
damage, or loose connections.
Replacing the Fuel Filter
Replace the fuel filter after every 800 operating hours or
yearly, whichever occurs first.
1. Raise the bed and support it with the prop rod.
2. Place a clean container under the fuel filter.
3. Remove the clamps securing the fuel filter to the fuel
lines.
1
Figure 38
1. Fuel filter
1/4 in.
1
m–4956
2. Jam nut
m–5322
30
4. Install the replacement fuel filter to the fuel lines with
the clamps previously removed. Mount the filter so that
the arrow points toward the carburetor.

Servicing the Spark Plugs

Replace the spark plugs after every 800 operating hours or
yearly, whichever occurs first, to ensure proper engine
performance and reduce the exhaust emission level.
Type: Champion RC 12YC (or equivalent)
Air Gap: 0.030 inch (0.762 mm)
Note: The spark plugs usually lasts a long time; however,
the plugs should be removed and checked whenever the
engine malfunctions.
1. Clean the area around the spark plugs so that foreign
matter cannot fall into the cylinder when the spark plug
is removed.
2. Pull the spark plug wires off of the spark plugs and
remove the plugs from the cylinder head.
3. Check the condition of the side electrode, center
electrode, and center electrode insulator to ensure that
there is no damage.
Figure 39
Important A cracked, fouled, dirty, or malfunctioning
spark plug must be replaced. Do not sand-blast, scrape, or
clean the electrodes by using a wire brush because grit may
eventually release from the plug and fall into the cylinder.
The result is usually a damaged engine.
4. Set the air gap between the center and side electrodes at
0.030 inch (0.762 mm). Install the correctly gapped
spark plug and tighten the plug to 18–22 ft.-lb.
(24–30 N m). If a torque wrench is not used, tighten the
plug firmly.
5. Install the spark plug wires.
0.030 inch
(0.762 mm)