STORAGE/ TRANSPORTING
13
4. if the insulator is cracked or chipped.
5. Measure the spark plug electrode gap with a suitable gauge.
The gap should be 0.028 - 0.031 in (0.70 - 0.80 mm). Correct
the gap, if necessary, by carefully bending the side electrode.
6. Install the spark plug carefully, by hand, to avoid cross-threading.
7. After the spark plug seats, tighten with a spark plug wrench to compress the water.
If reinstalling the used spark plug, tighten 1/8 - 1/4 turn after the spark plug seats.
If installing a new spark plug, tighten 1/2 turn after the spark plug seats.
CAUTION: A loose spark plug can overheat and damage the engine.
Over tightening the spark plug can damage the threads in the cylinder head.
8. Attach the spark plug cap.
Carburetor Modification for High Altitude Operation
At high altitude, the standard carburetor air-fuel mixture will be too rich. Performance will
decrease, and fuel consumption will increase. A very rich mixture will also foul the spark plug and
cause hard starting. Operation at an altitude that differs from that at which this engine was
certified, for extended periods of time, may increase emissions.
High altitude performance can be improved by specific modifications to the carburetor. If you
always operate your engine at altitudes above 5,000 feet (1,500 meters), have your servicing
dealer perform this carburetor modification. This engine, when operated at high altitude with the
carburetor modifications for high altitude use, will meet each emission standard throughout its
useful life.
5. STORAGE/ TRANSPORTING
STORING YOUR ENGINE
Storage Preparation
Proper storage preparation is essential for keeping your engine trouble free and looking good.
The following steps will help to keep rust and corrosion from impairing your engine’s function and
appearance, and will make the engine easier to start after storage.
Cleaning
If the engine has been running, allow it to cool for at least half an hour before cleaning. Clean all
exterior surfaces, touch up any damaged paint, and coat other areas that may rust with a light
film of oil.
CAUTION: Using a garden hose or pressure washing equipment can force water into
the air cleaner or muffler opening. Water in the air cleaner will soak the air filter, and water that
passes through the air filter or muffler can enter the cylinder, causing damage.
Water contacting a hot engine can cause damage. If the engine has been running, allow it to cool
for at least half an hour before washing.
Fuel
Gasoline will oxidize and deteriorate in storage. Old gasoline will cause hard starting, and it
leaves gum deposits that clog the fuel system. If the gasoline in your engine deteriorates during
storage, you may need to have the carburetor and other fuel system components serviced or
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