Toro 74259, Руководство оператора, Страница: 38 / 60

38
1
2
m–4811
Figure 40
1. Spark plug wire 2. Spark plug
Checking the Spark Plug
1. Look at the center of the spark plug(s) (Fig. 41). 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.
2. Check the gap between the center and side electrodes
(Fig. 41). Bend the side electrode (Fig. 41) if the gap is
not correct.
0.030 inch
(0.76 mm)
2
3
1
m–3215
Figure 41
1. Center electrode insulator
2. Side electrode
3. Air gap (not to scale)
Installing the Spark Plug
(s)
1. Install the spark plug(s). Make sure the air gap is set
correctly.
2. Tighten the spark plug(s) to 20 ft-lb (27 N.m).
3. Push the wire(s) onto the spark plug(s) (Fig. 40).
Servicing the Electronic Fuel
Injection System
This machine contains an electronic fuel injection system.
It controls the fuel flow under different operating
conditions.
Checking the Malfunction Indicator Light
If the malfunction indicator light (MIL) illuminates,
during operation, the electronic control unit (ECU) has
detected a problem or fault in the electronic fuel injection
(EFI) system.
Once the MIL illuminates, initial trouble shooting checks
should be made. Refer to Troubleshooting on page 58,
under the MIL section.
If these checks do not correct the problem, further
diagnosis and servicing by an Authorized Service Dealer
is necessary.
Servicing the Fuel Filters
Replace the high pressure fuel filter after every 1500
operating hours or more frequently under extremely dusty
or dirty conditions.
Ensure that an Authorized Service Dealer replaces the fuel
filter and any components for the fuel system.