Operator's Manual

33
5. Fill the crankcase with the proper type of new oil; refer
to Servicing the Engine Oil, page 31.
Servicing the Spark Plug
Check the spark plug(s) after every 100 operating hours.
Make sure that the air gap between the center and side
electrodes is correct before installing the spark plug. Use a
spark plug wrench for removing and installing the spark
plug(s) and a gapping tool/feeler gauge to check and adjust
the air gap. Install a new spark plug(s) if necessary.
Type: NGK BPR5ES (or equivalent)
Air Gap: 0.030 inch (0.76 mm)
Removing the Spark Plug(s)
1. Disengage the PTO, move the motion control levers to
the neutral locked position and set the parking brake.
2. Stop the engine, remove the key, and wait for all
moving parts to stop before leaving the operating
position.
3. Pull the wire(s) off of the spark plug(s) (Fig. 37). Clean
around the spark plug(s) to prevent dirt from falling into
the engine and potentially causing damage.
4. Remove the spark plug(s).
2
1
m–4294
Figure 37
1. Spark plug wire installed 2. Spark plug
Checking the Spark Plug
Clean or replace the spark plug and set the gap every
100 hours.
1. Look at the center of the spark plug(s) (Fig. 38). 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 Always replace the spark plug(s) when it
has a black coating, worn electrodes, an oily film, or
cracks.
2. Clean the electrode by scraping or with a wire brush to
remove carbon deposits and wetness.
3. Check the gap between the center and side electrodes
(Fig. 38). Bend the side electrode (Fig. 38) if the gap is
not correct.
0.030 inch
(0.76 mm)
2
3
1
m–3215
Figure 38
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 that the air gap is
set correctly.
2. Tighten the spark plug(s) to 16 ft-lb (22 N⋅m).
3. Push the wire(s) onto the spark plug(s) (Fig. 37).
Replacing the Fuel Filter
Replace the fuel filter after every 200 operating hours or
yearly, whichever occurs first.
Never install a dirty filter if it is removed from the fuel line.
1. Disengage the PTO, move the motion control levers to
the neutral locked position and set the parking brake.
2. Stop the engine, remove the key, and wait for all
moving parts to stop before leaving the operating
position.
3. Allow the machine to cool down.
4. Stop the engine, remove the key, and wait for all
moving parts to stop before leaving the operating
position.
5. Close the fuel shut-off valve on the console.
6. Squeeze the ends of the hose clamps together and slide
them away from the filter (Fig. 39).
7. Remove the filter from the fuel lines.