18
3329-784
Inspecting and Replacing
the Spark Plug
Use a NGK BPMR4A or equivalent spark plug. Check
and gap the spark annually, and replace the plug if
necessary.
1.
Remove all the
fasteners on the front
engine cover (A), but do
not try to remove the
cover.
m-7090
A
2.
Remove the
fasteners on the
left belt cover, then
remove the cover
in the sequence
shown.
m-7138
1
2
3.
Remove the fasteners on the right belt cover,
then remove the cover in the sequence shown.
m-7162
1
2
m-7163
3
4.
Separate the front engine cover from the rear
engine cover and disconnect the wire from the spark
plug.
m-7147
5.
Clean around the base of the spark plug.
6.
Remove the spark plug.
7.
Examine the spark plug and replace it if it is
cracked, fouled, dirty, or if the electrodes are worn.
Important: Do not clean the electrodes because grit
could enter the cylinder and damage the engine.
8.
Set the gap between
the electrodes on the
spark plug at 0.030 inch
(0.76 mm).
110
9.
Install the spark plug by hand and then torque it
to 15 ft-lb (20.4 N
m).
Note: If you do not have a torque wrench, tighten the
plug firmly.
10. Insert the left belt cover into place.
11. Insert the right belt cover into place.
12. Secure the front engine cover to the rear engine
cover using the fasteners previously removed.
13. Secure the left and right belt covers using the
fasteners previously removed.
Replacing the Drive Belts
If the auger/impeller drive belt or the traction drive
belt becomes worn, oil-soaked, or otherwise
damaged, go to www.Toro.com for additional service
information or have an Authorized Service Dealer
replace the belt.
