DUROMAX XP20HPE Bedienungsanleitung
This manual provides information regarding the
operation and maintenance of these products. We
have made every effort to ensure the accuracy of the
information in this manual. We reserve the right to
change this product at any time without prior notice.
5800 Ontario Mills Pkwy
Ontario, CA 91764 USA
www.duromaxpower.com
Call our Customer Care Team Toll Free 8-5pm PST Mon-Fri
844-DUROMAX
REV: XP20HPE_rev12152022
XP20HPE
SERVICE MANUAL
CONTENTS
1. Maintenance Schedule................................................................................................... 4
Break-In Period ............................................................................................................... 5
High Altitude Operation ................................................................................................. 5
Checking the Oil .............................................................................................................. 6
Changing the Oil.............................................................................................................. 7
Changing the Air Filter.................................................................................................... 8
Spark Plug Maintenance .............................................................................................. 10
Emptying the Gas Tank ................................................................................................ 12
Storing the Engine for Same Day Use ........................................................................ 14
Storing the Engine for Use Within 30 Days................................................................ 15
Storing the Engine for Longer Than 30 Days............................................................. 16
Maintenance and Care
3. Specications................................................................................................................. 23
Adjustment and Torque Value Specications ........................................................... 24
Engine Diagrams........................................................................................................... 25
Wiring Diagram ............................................................................................................. 27
Specications
2.
Common Engine Parts.................................................................................................. 18
Common Engine Parts
4.
Troubleshooting............................................................................................................ 28
Troubleshooting
5.
Maintenance Log........................................................................................................... 29
Maintenance Log
4
MAINTENANCE AND CARE
Proper routine maintenance of your engine is essential for safe, economical, and trouble-free
operation. It will also help reduce air pollution.
Maintenance Schedule
Remember that this schedule is based on the assumption that your machine will be used for its
designed purpose. Sustained high-load, high-temperature operation, or use in unusually wet or
dusty conditions, will require more frequent service.
SERVICE
EVERY USE
1ST MO. OR
8 HRS.
(BREAK IN)
EVERY 3 MO. OR
50 HRS. OF
HEAVY USE
EVERY 6 MO.
OR 100 HRS. OF
NORMAL USE
EVERY 12 MO. OR
300 HRS.
EVERY 3 YRS. OR
500 HRS.
ENGINE OIL CHECK CHANGE CHANGE CHANGE
AIR CLEANER CHECK CHECK CHANGE CHANGE
SPARK PLUG CLEAN /
ADJUST
CLEAN /
ADJUST
SPARK
ARRESTOR
CHECK CLEAN
IDLE SPEED CHECK /
ADJUST
VALVE
CLEARANCE
CHECK /
ADJUST
FUEL TUBE CHECK CHECK /
REPLACE
FUEL TANK /
FILTER
CLEAN
COMBUSTION
CHAMBER
CLEAN
4
WARNING: Improper maintenance, or failure to correct a problem before operation, can
cause a malfunction in which you can be seriously injured or killed. Always follow the
inspection, maintenance recommendations, and schedules in this instruction manual.
●Make sure the engine is o before you begin any maintenance or repairs.
●Let the engine and exhaust system cool before touching.
●To reduce the possibility of re or explosion, be careful when working around
gasoline. Use only a nonammable solvent, not gasoline, to clean parts. Keep
cigarettes, sparks, and ames away from all fuel-related parts.
5
Break-In Period
As the best practice for any new combustion motor it’s recommended to perform the break
in procedure as follows:
●Run the engine for the rst 6-8 hours on conventional oil, then change the oil. After
the break-in period synthetic oil may be used.
●During the break in period of the rst 6-8 hours keep the engine speed under 50% for
optimal results.
●Check and clean the air lter if necessary after the break-in period.
High Altitude Operation
At high altitudes, the standard carburetor air/fuel mixture will be too rich. The 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 diers from that at which this engine was certied, for extended periods of
time, may increase emissions. High altitude performance can be improved by specic modications to
the carburetor. If you always operate your engine at altitudes above 3,000 feet (900 meters), have a dealer
perform this carburetor modication. This engine, when operated at high altitude with the carburetor
modications for high altitude use, will meet each emission standard throughout its useful life. Even with
carburetor modication, engine horsepower will decrease by about 3.5% for each 1,000-foot (300-meter)
increase in altitude. The eect of altitude on horsepower will be greater than this if no carburetor
modication is made.
When the carburetor has been modied for high altitude operation, the air/fuel mixture will be too lean for
low altitude use. Operation at altitudes below 3,000 feet (900 meters) with a modied carburetor may cause
the engine to overheat and result in serious engine damage.
Note: Jet kits available for purchase upon request, please contact us at 844-DUROMAX to set up your
parts order.
MAINTENANCE AND CARE (CONTINUED)
Checking the Oil
6
Check the oil
The engine is equipped with an automatic shuto to protect
it from damage due to low oil. Nonetheless, you should check
the oil level of the engine before each use to ensure that the
engine crankcase has a sucient amount.
To check the oil level:
a. Make sure the engine is on a level surface.
b. Unscrew the oil ller/dipstick cap.
c. With a dry cloth, wipe the oil o of the stick on the
inside of the cap.
d. Insert the dipstick as if you were replacing the
cap and then remove it again. There should now be
oil on the stick. If there is no oil on the stick, or oil
only at the very end of the stick, you should add
oil until the engine crankcase is lled (see “Adding
Oil” portion of the “Maintenance” section).
e. The oil will be visible in the oil ll spout when full.
f. Be sure to replace the cap when nished checking
oil.
Model Number XP20HPE
Engine Oil Capacity 40.5 . oz (1.2 L)
7
Changing the Oil
Remove drain plug
Using a 12 mm hex wrench, unscrew the oil drain plug, which
is located on the crankcase underneath the oil ller/dipstick
cap.
Allow all the oil to drain from the engine.
1.
Drain oil
Drain oil into an approved oil disposal container. Contact
your local auto parts store for information on oil disposal.
2.
Replace drain plug
Replace the oil drain plug and tighten with a 12 mm hex
wrench.
3.
CAUTION: Worn out or dirty oil does not cool the
engine properly and can lead to catastrophic
engine damage.
In addition to regular oil changes, it is necessary to drain the
oil from the crankcase if it has become contaminated with
water or dirt.
Routine maintenance of the air cleaner helps maintain proper
airow to the carburetor. Check that the air cleaner is free of
excessive dirt after every use.
CAUTION: Improper maintenance may cause
less air to enter the engine or dirty air to enter
the engine causing overheating and engine
wear.
MAINTENANCE AND CARE (CONTINUED)
Changing the Air Filter
Remove lter cover wing nut
Remove lter cover
Remove old lter element
Remove the top screw located on the top of the air lter cover.
Remove the plastic air lter cover by lifting the cover upwards
to expose the air lter element.
Remove the wing nut on top of the air lter element and slide
lter element o center bolt. This lter is paper and is not
reusable. Please call 1-844-DUROMAX to order a replacement
lter for your engine.
1.
2.
3.
8
9
Replace new lter element
Slide new lter element over center bolt, and replace wing nut.
Tighten wing nut hand tight to keep lter in place.
4.
Replace lter cover
Replace plastic air lter cover over the air lter base.
5.
6. Secure lter cover
Fasten the air lter cover with the air lter cover wing nut and
tighten about hand tight.
MAINTENANCE AND CARE (CONTINUED)
The spark plug is important for proper engine operation.
A good spark plug should be intact, free of deposits, and
properly gapped.
Spark Plug Maintenance
Remove spark plug cap
Remove spark plug
Inspect spark plug
Pull on the spark plug cap to remove it.
Unscrew the spark plug from the engine using the spark plug
wrench included with this product.
Visually inspect the spark plug. If it is cracked or chipped,
discard and replace it with a new spark plug. We recommend
using an F6TC spark plug such as NGK BP6ES.
1.
2.
3.
CAUTION: Improper maintenance may cause reduced fuel economy, misres,
trouble starting, or damage to the spark plug threads.
SPARK PLUG
CONSULT MANUAL
BEFORE REMOVING
10
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