15
FIG 14
6.9 Inspecting and Replacing the Spark Plug
Service Interval:
Every 100 hours
Check and gap the spark yearly, and replace the plug
if necessary.
6.9.1
Clean around the base of the spark plug.
6.9.2
Remove the spark plug.
6.9.3
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.
6.9.4
Set the gap between the electrodes on the spark
plug at 0.03 inch (0.76mm). (FIG 14)
6.9.5
Install the spark plug by hand and then torque it
to 15ft-lb (20.4N-m).
Note:
If you do not have a torque wrench, tighten the
plug firmly.
6.10 Adjusting the Traction Drive Belt
Service Interval:
After the first hour
Before each use or daily
Adjust the traction drive belt after the first operating
hour, after every 5 operating hours thereafter, and
when the speed control handle shifts properly but the
snow thrower does not drive in the forward or reverse
speeds.
6.10.1
Adjust the belt with 10 pounds of pressure. If
the belt moves 1/4″, it is all right. If not, you should
adjust the belt.
（
FIG 15
）
6.10.2
Loosen the flange-head bolts of the tension
pulley, adjust, and retighten the bolts.
6.10.3
Repeat steps 6.10.1 and 6.10.2 above, until the
¼” deflection is achieved.
6.10.4
If the problem continues to persist, contact the
dealer.
FIG 15
6.11 Replacing the Traction Drive Belt
If the traction drive belt becomes worn, oil-soaked, or
otherwise damaged, replace the belt.
6.11.1
Loosen bolts and remove the belt cover.
(FIG 16
）
6.11.2
Remove the auger/impeller drive belt.
（
FIG 17
）
6.11.3
Loosen the traction drive belt tension pulley.
（
FIG 17
）
6.11.4
Remove
the traction drive belt.
（
FIG 17
）
6.11.5
Install the new traction drive belt.
6.11.6
Install the Auger/Impeller Drive Belt.
6.11.7
Adjust the traction drive belt tension pulley.
See “Adjusting the Traction Drive Belt”.
6.11.8
Move the belt guide to work position and
tighten bolts.
6.11.9
Install the belt cover.
FIG 16
Summary of Contents for WS2690BSE
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