Removing the Spark Plug(s)
1. Diseng ag e the po w er tak e off (PTO), set the
parking brak e , and tur n the ignition k ey to off .
R emo v e the k ey .
2. Pull the wire(s) off the spark plug(s) ( Figure 39 ).
No w clean around the spark plug(s) to prev ent
dir t from falling into the engine and potentially
causing damag e .
3. R emo v e the spark plug(s) and metal w asher .
Figure 39
1. Spark plug wire 2. Spark plug
Checking the Spark Plug
1. Look at the center of the spark plug(s)
( Figure 40 ). If y ou see light bro wn or g ra y on
the insulator , the engine is operating properly .
A blac k coating on the insulator usually means
the air cleaner is dir ty .
Important: Nev er clean the spar k
plug(s). Al w ays r eplace the spar k plug(s)
when it has: a black coating , w or n
electr odes, an oil y film, or cracks.
Figure 40
1. Center electrode insulator
3. Air gap (not to scale)
2. Side electrode
2. Chec k the g ap betw een the center and side
electrodes ( Figure 40 ). Bend the side electrode
if the g ap is not cor rect.
Installing the Spark Plug(s)
1. Install the spark plug(s) and metal w asher .
Mak e sure the air g ap is set cor rectly .
2. Tighten the spark plug(s) to 30 ft-lb (41 N·m).
3. Push the wire(s) onto the spark plug(s)
( Figure 39 ).
Servicing the Fuse
T he electrical system is protected b y a fuse . It
requires no maintenance . If the fuse blo ws c hec k
component or circuit for malfunction or shor t.
T o re place fuse pull out on the fuse ( Figure 41 )
to remo v e or re place it.
Figure 41
1. Fuse, 7.5 amp, blade type
34