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3.
Measure the plug gap with a feeler gauge. Correct as necessary
by bending the side electrode, Figure 19. The gap should be set
to .02-.03 inches (0.60-0.80 mm).
Electrode
.02-.03 in.
(0.60-0.80 mm)
4.
Check that the spark plug washer is in good condition and thread
the spark plug in by hand to prevent cross-threading.
5.
After the spark plug is seated, tighten with a spark plug wrench to
compress the washer.
NOTE: When installing a new spark plug, tighten 1⁄2-turn after the spark
plug seats to compress the washer. When reinstalling a used spark plug,
tighten 1⁄8- to 1⁄4-turn after the spark plug seats to compress the washer.
CAUTION
The spark plug must be tightened securely. A loose spark plug can
become very hot and can damage the engine.
Cleaning the Engine
If the engine has been running, allow it to cool for at least half an hour
before cleaning. Periodically remove dirt build-up from engine. Before
servicing the engine, remove the carburetor cover and/or blower
housing. Clean dirt and debris from the following areas:
•
Cooling Fins
•
Air Intake Screen or Recoil Starter/Flywheel Guard Areas
•
Spark Plug Connection
•
Levers
•
Linkage Area
•
Guards
•
Carburetor
•
Engine Head
SERVICE AND MAINTENANCE
Figure 19
Removing debris will insure adequate cooling, correct engine speed
and reduce the risk of fire.
Do not spray the engine with water to clean it because the water could
contaminate the fuel. Using a garden hose or pressure washing equip-
ment can also force water into the muffler opening. Water that passes
through the muffler can enter the engine cylinder and cause damage.
WARNING
Accumulation of debris around the muffler could cause a fire. Inspect
and clean before every use.
LUBRICATION
Lubricate the pivot points on the control handle and the extension
spring at the end of the control cable with a light oil once every season
and before the snow thrower is put into storage at the end of the
season.
ADJUSTMENTS
Shave Plate
To check the adjustment of the shave plate, place the machine on a
level surface. The wheels, shave plate and auger paddles should all
contact the level surface. Note that if the shave plate is adjusted too
high, snow may blow under the auger housing. If the shave plate wears
out excessively, or the snow thrower does not self-propel, the shave
plate may be too low the ground and needs to be adjusted.
NOTE: On new snow throwers or machines with a new shave plate
installed, the auger paddles may be slightly off the ground.
To adjust the shave plate proceed as follows:
1.
Run the snow thrower until the fuel tank is empty.
2.
Pull the starter cord until resistance is felt. Then tip the snow
thrower back until it rests on the handles. To ensure that the snow
thrower does not tip forward, it may be necessary to secure the
handle to the ground with a block or other object.
3.
Loosen the four flange lock nuts and carriage screws which secure the
shave plate to the housing. See Figure 20. Move the shave plate to the
appropriate position and retighten the nuts and screws securely.
Reversible Shave Plate
16
CAUTION
Side View
Screw
Lock Nut
Figure 20
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