Servicing the Spark Plug
Service Interval: Every 100 hours
Use an NGK BPR5ES spark plug or equivalent.
1.
Shut off the engine and wait for all moving parts
to stop.
2.
Disconnect the wire from the spark plug.
3.
Clean around the spark plug.
4.
Remove the spark plug from the cylinder head.
Important:
Replace a cracked, fouled, or
dirty spark plug. Do not clean the electrodes
because grit entering the cylinder can
damage the engine.
5.
Set the gap on the plug to 0.76 mm (0.030 inch);
refer to
Figure
32.
Figure 32
1. Center-electrode insulator
2. Side electrode
6.
Install the spark plug and the gasket seal.
7.
Torque the plug to 23 N∙m (17 ft-lb).
8.
Connect the wire to the spark plug.
Checking the Condition of
the Belts
Service Interval: Every 50 hours
1.
Shut off the engine and wait for all moving parts
to stop.
2.
Remove the belt cover
the 4 bolts that hold it to the machine housing.
3.
Check the belts for any cracks, frayed edges,
burn marks, or any other damage.
4.
Replace all damaged belts.
5.
If you replace the blade-drive belt, you must
adjust it. Refer to
System (page
22).
3. Air gap (not to scale)
(Figure
9) by removing
Servicing the Blade-Drive
6.
Install the belt cover with the 4 bolts that you
removed in step 2.
Emptying the Fuel Tank and
Cleaning the Filter
Service Interval: Every 50 hours—Check the fuel
Every 100 hours—Clean the fuel tank filter.
Yearly or before storage—Empty the fuel tank
before repairs as director or before storage.
Note:
The fuel tank filter (screen) element is located
inside the fuel tank at the outlet. This filter is a part of
the fuel tank and cannot be removed.
1.
Shut off the engine and wait for it to cool down.
Important:
only.
2.
Disconnect the wire from the spark plug.
3.
Close the fuel-shutoff valve.
4.
Disconnect the fuel line by loosening the tube
clamp at the carburetor.
5.
Open the fuel-shutoff valve and drain the fuel
completely from the tank and fuel line into an
g000533
approved fuel container.
6.
Remove the fuel tank from the machine.
7.
Pour a small amount of fuel in the fuel tank,
move the fuel around in the tank, and pour it out
into an approved fuel container.
8.
Install the fuel tank and the fuel line.
Changing the Fuel Filter
Service Interval: Every 100 hours
1.
Shut off the engine and wait for all moving parts
to stop.
2.
Disconnect the wire from the spark plug.
3.
Close the fuel-shutoff valve
21
hose and replace it if necessary.
Drain fuel from a cold engine
(Figure
33).