honda-power-equipment gxv390 Manual Do Utilizador

3. Inspect the spark plug. Replace it if 

damaged, badly fouled, if the sealing 
washer is in poor condition, or if the 
electrode is worn. 

4. Measure the electrode gap with a 

suitable gauge. The correct gap is 
0.028 - 0.031 in (0.70 - 0.80 mm). If 
adjustment is needed, correct the gap 
by carefully bending the side electrode.

5. Install the spark plug carefully, by hand, 

to avoid cross-threading. After the 
spark plug is seated, tighten with the 
proper size spark plug wrench to compress the washer. When 
installing a new spark plug, tighten 1/2 turn after the spark plug 
seats to compress the washer. When reinstalling the original spark 
plug, tighten 1/8 - 1/4 turn after the spark plug seats to compress 
the washer.

6. Attach the spark plug cap to the spark plug.

In some areas, it is illegal to operate an engine without a USDA 
(United States Department of Agriculture)-qualified spark arrester. 
Check local laws and regulations. A USDA-qualified spark arrester is 
available from an authorized Honda servicing dealer. The spark 
arrester must be serviced every 100 hours to keep it functioning as 
designed. If the engine has been running, the muffler will be hot. Allow 
it to cool before servicing the spark arrester.

Spark Arrester 
Removal
1. Remove the three 

5 mm screws and 
remove the heat 
shield. 

2. Remove the 8 mm 

nuts and then 
remove the 
identification plate, 
muffler and gasket.

3. Remove the spark arrester from the muffler.

Spark Arrester Cleaning & Inspection
1. Use a brush to remove carbon deposits 

from the spark arrester screen. Be 
careful not to damage the screen. 
Replace the spark arrester if it has 
breaks or holes.

2. Install the spark arrester in the reverse 

order of removal.

Storage Preparation
Proper storage preparation is essential for keeping your engine 
troublefree 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 when you use it again.

Cleaning
If the engine has been running, allow it to cool for at least half an hour 
before cleaning. 

Fuel 
Gasoline will oxidize and deteriorate in storage. Deteriorated 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 replaced. The length of time that gasoline can be left in 
your fuel tank and carburetor without causing functional problems will 
vary with such factors as gasoline blend, your storage temperatures, 
and whether the fuel tank is partially or completely filled. The air in a 
partially filled fuel tank promotes fuel deterioration. Very warm storage 
temperatures accelerate fuel deterioration. Fuel problems may occur 
within a few months, or even less if the gasoline was not fresh when 
you filled the fuel tank.

Fuel system damage or engine performance problems resulting from 
neglected storage preparation are not covered under the Distributor’s 
Limited Warranty (see page 11). You can extend fuel storage life by 
adding a gasoline stabilizer that is formulated for that purpose, or you 
can avoid fuel deterioration problems by draining the fuel tank and 
carburetor.

Battery (if equipped)
Remove the battery and store it in a cool, dry place. Recharge it once 
a month.

When adding a gasoline stabilizer, fill the fuel tank with fresh gasoline. 
If only partially filled, air in the tank will promote fuel deterioration 
during storage. If you keep a container of gasoline for refueling, be 
sure that it contains only fresh gasoline.

1. Add gasoline stabilizer following the manufacturer’s instructions.

2. After adding a gasoline stabilizer, run the engine outdoors for 10 

minutes to be sure that treated gasoline has replaced the untreated 
gasoline in the carburetor.

3. Stop the engine, and turn the fuel valve to the OFF position (see 

LPG fuel does not require treatment during storage.