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13 of 16
Rev. 1/2010
Heavy Duty Power Equipment
4550 Pro, 5650, 6500(EL), 7550 Pro
4. Visually inspect the spark plug. Dis-
card it if the insulator is cracked,
chipped or fouled.
5. Measure the plug gap with a feeler
gauge. Correct as necessary by
carefully bending the side electrode.
The gap should be: 0.028 0.031 in
(0.70 0.80 mm)
6. Check that the spark plug washer is in good condition, and
thread the spark plug in by hand to prevent cross-threading.
7. After the spark plug is seated, tighten with a spark plug
wrench to compress the washer.
If installing a new spark plug, tighten 1/2 turn after the spark
plug seats to compress the washer. If reinstalling a used spark
plug, tighten 1/8 1/4 turn after the spark plug seats to compress
the washer.
NOTICE
:
The spark plug must be securely tightened. An improperly tight-
ened spark plug can become very hot and could damage the
engine. Use only the recommended spark plugs or equivalent.
Optional Spark Arrestor Maintenance
If the generator has been running, the muffler will be very hot.
Allow it to cool before proceeding.
The spark arrester must be
serviced every 50 hours to keep it functioning as designed.
Clean the spark arrester as follows:
1. Loosen the screw by the exhaust port of the muffler and
remove the spark arrester.
2. Use a brush to remove carbon deposits from the spark ar-
rester screen. Inspect the screen for breaks or tears and
replace it if necessary.
3. Install the spark arrester in the reverse order of removal.
Maintenance
Optional Starter Motor Fuse Replacement
If the fuse is blown, the starter motor won‟t operate. Turn the en-
gine switch to the OFF position. Remove the fuse holder cover
and replace the fuse. The specified fuse is 10A.
NOTICE:
Never use a fuse with a
different rating from that
specified. Serious dam-
age to the electrical sys-
tem or fire may result.
TRANSPORTING
When transporting the generator, turn the engine switch and the
fuel valve OFF. Keep the generator level to prevent fuel spillage.
Fuel vapor or spilled fuel may ignite.
Take care not to drop or strike the generator when transporting.
Do not place heavy objects on the generator. When transporting
the generator by loading it on to a vehicle, secure to the genera-
tor frame as shown.
DANGER
Contact with a hot engine
or exhaust system can
cause serious burns or
fires. Let the engine cool
before transporting or stor-
ing the generator.
STORING
Before storing the unit for an extended period:
1. Be sure the storage area is free of excessive humidity and dust.
2. Service according to the table below:
STORAGE TIME
Recommended Service Procedure to prevent hard starting:
1 to 2 months
Fill with fresh gasoline and add gasoline conditioner*.
2 months to 1 year
Fill with fresh gasoline and add gasoline conditioner*.
Drain the carburetor float bowl.
1 year or longer
Fill with fresh gasoline and add gasoline conditioner*.
Drain the carburetor float bowl.
Remove the spark plug. Put a tablespoon of engine oil into the cylinder.
Turn the engine slowly with the recoil starter to distribute the oil. Reinstall
the spark plug.
Change the engine oil.
After removal from storage, drain the stored gasoline into a suitable con-
tainer, and fill with fresh gasoline before starting.
* Use gasoline conditioners that are formulated to extend storage life. Contact your authorized
DEK generator dealer for conditioner recommendations.
Storage Preparation
1. Drain the carburetor by loosening the drain screw. Drain the
gasoline into a suitable container. Place 4 ounces of fuel
stabilizer in the fuel tank.
2. Change the engine oil (page 10 ).
3. Remove the spark plug, and pour about a tablespoon of
clean engine oil into the cylinder. Turn the engine several
revolutions slowly with the recoil starter to distribute the oil,
then reinstall the spark plug.
4. Slowly pull the starter grip until resistance is felt. At this
point, the piston is coming up on its compression stroke and
both the intake and exhaust valves are closed. Storing the
engine in this position will help to protect it from internal
corrosion.
WARNING
Gasoline is extremely flammable and is explosive under
certain conditions. Perform this task in a well-ventilated
area with the engine stopped. Do not smoke or allow flames
or sparks in the area during this procedure.
SPARK ARRESTOR
SCREW
