Figure 37
1. Center electrode insulator
3. Air gap (not to scale)
2. Side electrode
Installing the Spark Plug(s)
1. Install the spark plug(s). Mak e sure that the air g ap
is set cor rectly .
2. Tighten the spark plug(s) to 16 ft-lb (22 N·m).
3. Push the wire(s) onto the spark plug(s) ( Figure 36 ).
Fuel System
Maintenance
Draining The Fuel Tank
In cer tain conditions, gasoline is extr emel y
flamma ble and highl y explosi v e. A fir e or
explosion fr om gasoline can bur n y ou and other s
and can dama ge pr oper ty .
• Drain gasoline fr om the fuel tank when the
engine is cold. Do this outdoor s in an open
ar ea. W ipe up an y gasoline that spills.
• Nev er smok e when draining gasoline, and
stay a w ay fr om an open flame or wher e a
spar k may ignite the gasoline fumes.
1. P ark the mac hine on a lev el surface , to ensure the
fuel tank drains completely . Diseng ag e the PTO
and set the parking brak e .
2. Stop the engine , remo v e the k ey , and w ait for all
mo ving par ts to stop before lea ving the operating
position.
3. Close the fuel shut-off v alv e at the fuel tank
( Figure 38 ).
Figure 38
1. Fuel shut-off valve
4. Open the hood.
5. Squeeze the ends of the hose clamp tog ether
and slide it up the fuel line to w ard the fuel tank
( Figure 39 ).
Figure 39
1. Hose clamp 3. Filter
2. Fuel line
6. Pull the fuel line off the filter ( Figure 39 ). Open
fuel shut-off v alv e and allo w g asoline to drain into
an appro v ed g as can.
Note: No w is the best time to install a new fuel
filter because the fuel tank is empty .
7. Install the fuel line onto the filter . Slide the hose
clamp close to the filter to secure the fuel line
and filter; R efer to R e placing the Fuel Filter in
Fuel System Maintenance , pag e 31 .
Servicing the Fuel Filter
R e place the fuel filter after ev er y 100 operating hours
or yearly , whic hev er occurs first.
31