Checking The Spark Arrester; Fuel System Maintenance; Servicing The Electronic Fuel-Injection System; Replacing The Fuel Filter - Toro 74310 Operator's Manual

Installing the Spark Plugs
Tighten the spark plugs to 24.4 to 29.8 N∙m (18 to 22 ft-lb).
Figure 37

Checking the Spark Arrester

For a Model with a Spark Arrester
Service Interval: Every 50 hours
WARNING
Hot exhaust system components may ignite
gasoline vapors even you shut off the engine. Hot
particles exhausted during engine operation may
ignite flammable materials. Fire may result in
personal injury or property damage.
Do not refuel or run the engine unless a spark
arrester is installed.
1. Shut off the engine, wait for all moving parts to stop,
and remove the key. Engage the parking brake.
2. Wait for the muffler to cool.
3. If there are any breaks in the screen or welds, replace
the arrester.
4. If the screen is plugged, remove the arrester and
shake the loose particles out of the arrester and clean
the screen with a wire brush (soak it in solvent if
necessary). Install the arrester on the exhaust outlet.
Fuel System
Maintenance
WARNING
Fuel system components are under high pressure.
The use of improper components can result in
system failure, gasoline leakage, and possible
explosion.
Use only approved fuel lines and fuel filters.
Servicing the Electronic
Fuel-Injection System
This machine contains an electronic fuel-injection system. It
controls the fuel flow under different operating conditions.
The electronic control unit (ECU) continuously monitors the
operation of the EFI system.
If a problem or fault within the system is detected, the
malfunction indicator light (MIL) illuminates. The MIL is the
red light located in the right console panel.
Once the MIL illuminates, make initial troubleshooting
checks. Refer to the MIL section under
(page 58).
If these checks do not correct the problem, further diagnosis
and servicing by an Authorized Service Dealer is necessary.

Replacing the Fuel Filter

Service Interval: Every 200 hours/Yearly (whichever comes
first) (more often in dirty or dusty
conditions).
The fuel filter is located near the engine on the front or rear
side of the engine.
1. Move the speed-control lever to the N
to stop the machine.
2. Disengage the PTO, engage the parking brake, shut off
the engine, and wait for all moving parts to stop.
3. Wait for the machine to cool down.
4. Close the fuel-shutoff valve under the seat
5. Squeeze the ends of the hose clamps together and slide
them away from the filter
36
Troubleshooting
position
EUTRAL
(Figure 13).
(Figure 38).