Replacing The Spark Plugs; Fuel System Maintenance; Replacing The Fuel Filter; Fuel Lines And Connections - Toro 04357 Operator's Manual

4. Adjust the idle stop screw clockwise until the idle
speed is an additional 25 to 50 RPM over the idle
speed set in step 3
5. Move the throttle control to the Fast position. Bend
the high speed spring anchor tang (Figure 50) to
attain a high speed of 2850±50 RPM.

Replacing the Spark Plugs

Replace the spark plugs after every 800 operating hours.
The recommended air gap is 0.030 in. (0.76 mm)
The correct spark plug to use is a Champion RC 14YC.
Note: The spark plug usually lasts a long time; however,
the plug should be removed and checked whenever the
engine malfunctions.
1. Clean the area around the spark plugs so 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.
Important: Replace a cracked, fouled, dirty, or
otherwise malfunctioning spark plug. Do not
sand blast, scrape, or clean electrodes by using a
wire brush because grit may eventually release
from the plug, fall into the cylinder, and damage
the engine.
4. Set the air gap between the center and side of the
electrodes at 0.030 in. (0.76 mm) (Figure 51).
Figure 51
5. Install the correctly gapped spark plug with gasket
seal, and tighten the plug to 200 in-lb (23 N⋅m). If a
torque wrench is not used, tighten the plug firmly.
Fuel System
Maintenance

Replacing the Fuel Filter

An in-line filter is incorporated into the fuel line between
the fuel tank and carburetor (Figure 52). Replace the
filter every 800 hours or sooner if the fuel flow is
restricted. Be sure the arrow on the filter is pointing
away from the fuel tank.
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.
1. Close the fuel shut off valve, loosen the hose clamp
on the carburetor side of filter, and remove the fuel
line from the filter (Figure 52).
1. Fuel shut off valve
2. Place a drain pan under the filter, loosen the
remaining hose clamp and remove the filter
(Figure 52).
3. Install the new filter with the arrow on the filter body
pointing away from the fuel tank.

Fuel Lines and Connections

Service Interval: Every 2 years
Inspect the fuel lines for deterioration, damage, or loose
connections.
36
Figure 52
2. Fuel filter