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12 of 16
Rev. Oct2016
Models: G5000D & G8000D
Maintenance
MAINTENANCE
The Importance of Maintenance
Good maintenance is essential for safe, economical, and trouble-
free operation. It will also help reduce air pollution.
To help you properly care for your generator, the following pages
include a maintenance schedule, routine inspection procedures, and
simple maintenance procedures using basic hand tools. Other ser-
vice tasks that are more difficult, or require special tools, are best
handled by professionals and are normally performed by a DEK
technician or other qualified mechanic.
The maintenance schedule applies to normal operating conditions.
If you operate your generator under severe conditions, such as sus-
tained high-load or high-temperature operation, or use it in unusu-
ally wet or dusty conditions, consult your servicing dealer for recom-
mendations applicable to your individual needs and use.
Maintenance, replacement, or repair of the emission control devic-
es and systems may be performed by any engine repair establish-
ment or individual, using parts that are ‘‘certified’’ to EPA stand-
ards.
Replacement Parts
The emission control systems on your DEK engine were designed,
built, and certified to conform with EPA and California emission regu-
lations. We recommend the use of genuine DEK parts whenever you
have maintenance done. These original-design replacement parts are
manufactured to the same standards as the original parts, so you can
be confident of their performance. The use of replacement parts that
are not of the original design and quality may impair the effectiveness
of your emission control system.
A manufacturer of an aftermarket part assumes the responsibility
that the part will not adversely affect emission performance. The
manufacturer or rebuilder of the part must certify that use of the part
will not result in a failure of the engine to comply with emission regu-
Maintenance Schedule
* Should be performed by an authorized DEK service center.
Item
Before
each use
20 hrs or
3
months
50 hrs or
3
months
100 hrs
or 6
months
300 hrs
or 1
year
Engine oil (Check)
X
Engine Oil (Change)
X
Air Cleaner (Check)
X
Air Cleaner Wash
X
Fuel filter Cup (Clean)
X
Spark Plug (Clean)
X
Spark Plug (Change)
X
Optional Spark Arrestor (Clean)
X
Valve Clearance (Adjust)
X*
Fuel Tank and Filter (Clean)
X*
Fuel Tube (Check)
Combustion Chamber (Clean)
Every 2 yrs (replace if necessary)*
After every 250 hrs*
Engine Oil Change
Drain the oil while the engine is warm to assure rapid and complete
draining.
1.
Remove the drain plug and sealing washer, remove the oil filler
cap, and drain the oil.
2.
Reinstall the drain plug and sealing washer. Tighten the plug
securely.
3.
Refill with the recommended oil (SAE 10W-30 ) and check the oil
level.
Dispose of used motor oil in a manner that is compatible with the
environment. Do not throw it in the trash, pour it on the ground, or
down a drain.
Air Cleaner Service
A dirty air cleaner will restrict air flow to the carburetor. To prevent
carburetor malfunction, service the air cleaner regularly. Service more
frequently when operating the generator in extremely dusty areas.
NOTICE:
Never run the generator without the air filter. Rapid engine wear will
result.
1.
Unsnap the air cleaner cover clips, remove the air cleaner cover,
and remove the element.
2.
Wash the air cleaner element in a solution of household deter-
gent and warm water, then rinse thoroughly, or wash in nonflam-
mable or high flashpoint solvent. Allow the air cleaner element to
dry thoroughly.
3.
Soak the air cleaner element in clean engine oil and squeeze out
the excess oil. The engine will smoke during initial startup if too
much oil is left in the air cleaner element.
4.
Reinstall the air cleaner element and the cover.
Fuel Filter Cleaning
The fuel filter cup / screen prevents dirt which may be in the fuel from
entering the carburetor. The fuel filter should be inspected and
cleaned on a regular basis. For best results, clean the filter with gaso-
line and a toothbrush or blow the debris out of the filter with air pres-
Spark Plug Service
In order to service the spark plug, you will need a spark plug wrench.
Recommended spark plugs: BPR5ES (NGK) and W16EPR-U (DENSO).
To ensure proper engine operation, the spark plug must be properly
gapped and free of deposits.
If the engine has been running, the muffler will be very hot. Be careful
not to touch the muffler.
1.
Remove the spark plug cap.
2.
Clean any dirt from around the spark plug base.
3.
Use a spark plug wrench to remove the spark plug.