DuroMax XP7HPE User Manual
Gasoline Engine
Owner’s Manual
DuroMax Customer Service
info@duromaxpower.com
or call 844-DUROMAX Monday - Friday 7am to 5:00pm. PST
Product Support (Product: information, application, service info & warranty questions)
support@duromaxpower.com
or call 844-DUROMAX Monday - Friday 7am to 5:00pm. PST
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.
Please keep this manual available to all users during the entire life of the engine.
CONTENTS
SAFETY PRECAUTIONS............................................................................................................................................2
PARTS DESCRIPTIONS .............................................................................................................................................
BATTERY CONNECTION (electric-start type)..........................................................................................................4
PRE-OPERATION INSPECTION................................................................................................................................4
ENGINE OIL...........................................................................................................................................................4
FUEL AND FUEL TANK........................................................................................................................................6
STARTING THE ENGINE ............................................................................................................................................7
RUNNING THE ENGINE..............................................................................................................................................8
LOW OIL SENSOR.................................................................................................................................................8
OPERATING AT HIGH ALTITUDE......................................................................................................................
SHUTTING DOWN.........................................................................................................................................................9
EXHAUST CONTROL SYSTEM.................................................................................................................................9
MAIN
TENANCE...........................................................................................................................................................10
MAINTENANCE SCHEDULE............................................................................................................................10
CHANGING THE ENGINE OIL..........................................................................................................................11
CLEANING THE AIR CLEANER........................................................................................................................12
CLEANING THE DEPOSIT CUP.......................................................................................................................13
SPARK PLUG ......................................................................................................................................................13
CARBURETOR IDLE ADJUSTMENT...............................................................................................................14
TRANSPORT, STORAGE AND REMOVAL FROM STORAGE...........................................................................15
TRANSPORT.......................................................................................................................................................15
STORAGE............................................................................................................................................................15
REMOVAL FROM STORAGE...........................................................................................................................16
SERVICE AFTER STORAGE............................................................................................................................16
SPECIFICATIONS.......................................................................................................................................................17
TROUBLESHOOTING ..............................................................................................................................................
I. START ENGINE DIFFICULTLY......................................................................................................................17
II. LOW GASOLINE ENGINE POWER OUTPUT...........................................................................................19
III. GASOLINE ENGINE WILL NOT RUN SMOOTHLY.................................................................................19
IV. STOPS SUDDENLY WHEN RUNNING......................................................................................................20
V. GASOLINE ENGINE IS EXCESSIVELY HOT............................................................................................20
VI. THERE IS ABNORMAL NOISE WHEN ENGINE RUNNING..................................................................21
WIRING DIAGRAM.....................................................................................................................................................22
EXPLODED VIEW AND PARTS LIST(7HP)............................................................................................................24
EXPLODED VIEW AND PARTS LIST(16HP)..........................................................................................................27
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1
SAFETY PRECAUTIONS
WARNING:
Before operating the engine, be sure to read and familiar with the manual carefully, otherwise
personal injury or equipment damage may produce.
Please pay special attention to the following:
1. Running the engine in a well-ventilated place, keep it at least one meter away from building
walls or other equipments, keep away from inflammables such as gasoline, matches and so on
to avoid possibility of fire.
2. Keep the engine out of reach of children and pets to avoid accidents.
3. Operator of engine has been specially trained.
4. Refuel in a well-ventilated area with the engine stopped, and in places refueling or storing
gasoline, no smoking and any flames or sparks.
5. Refuel the fuel tank not too full so as to avoid fuel’s spilling out. If there is spilled fuel around, be
sure to clean it thoroughly before starting.
6. Locate the engine on a level-working platform to avoid fuel’s spilling out.
7. Maker sure the fuel filler cap is tightened securely.
8. The exhaust muffler is very hot during running the engine even after the engine stops. Never
touch it, or you may get burns. Transport or store the engine with it cooling down entirely.
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PARTS DESCRIPTION
The main parts of engine are located as follows
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BATTERY CONNECTION (electric-start type)
In the case that the specifications of the battery are 12V and more than 18A.h connect its
positive lead to the electromagnetic coil while connect its negative lead to engine mount strew,
base screw or any place capable of grounding with the engine well.
Make sure the battery leads are connected tightly and no corrosion is found. If any, eliminate it.
WARNING:
● The battery may give off explosive gas;
keep sparks, flames and cigarettes away.
Charge or use it in an area with good
ventilation.
● The battery contains sylphlike acid
(electrolyte). Contact with skin or eyes
may cause severe burns. Wear protective
clothing and a face shield.
If electrolyte gets in your skin, flush with
water; if gets in your eyes, flush with water for at least 15 minutes and call a physician at once.
● Electrolyte is poisonous. If swallowed, drink large quantities of water or milk, and follow with
milk of magnesia or vegetable oil and oil a physician.
● Keep out of reach of children.
CAUTION:
● Do not add tap water to the battery instead of distilled water, or the battery life will be
short-need.
● Do not add distilled water over electrolyte upper level mark, or electrolyte will spill out to corrupt
the engine parts. If so, be sure to wash them away with water.
● Make sure not to connect the battery leads in reverse or-deer, or short-circuit or breaker’s
cutting may result.
PRE-OPERATE INSPECTION
ENGINE OIL
CAUTION:
● Engine oil is key factor in deciding the engine’s
performance. Do not apply engine oil with additives
or 2-stroke gasoline oil, as they haven’t enough
lubrication, which may shorten the en-gene’s service
life.
● Check the engine with it
stopped on a level ground.
Engine oil recommended:
SAE10W-30
As viscosity varies with
regions and temperatures,
so the lubricant has to be
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selected in accordance with our recommendation.
Check
1. Ensure that the engine is stopped on a level ground.
2. Remove the dipstick and clean it.
3. Reinsert the dipstick into the oil filler without screwing it, and check oil level.
4. If the oil level is too low, add the recommended engine oil up to the oil filler neck.
5. Reinstall the dipstick.
CAUTION: Run with insufficient engine oil may damage the engine severely.
OIL IN THE REDUCTION GEAR BOX (only for the model
equipped with it) 1/2 Reduction gear with an auto-centrifugal
clutch
Brand of the box oil is the same as that of engine oil.
Oil capacity: 0.5liters for 190N, 0.3liters for 170N. Check the oil
lever in the following order.
1. Remove the dipstick and clean it.
2. Reinsert the dipstick without screwing it in, and then check
oil level
.
3. If the oil level is too low, add the
recommended engine oil until it arrives the
upper level mark.
4. Reinstall the dipstick.
AIR CLEANER
I. Double-core type
Dismantle the air cleaner housing and check its
filter element, make sure it clean and intact,
otherwise clean or replace it.
II. Dust-collecting type
1. Dismantle the dust-collecting hood and check
the filter element of the air cleaner; make
sure it is clean and intact, otherwise clean or
replace.
2. Check whether there is any dust or dirt inside
the dust-collecting hood, if any, clears away.
III. Single-core type
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Dismantle the air cleaner housing and check its filter element, make sure it is clean and intact,
otherwise clean or replace.
IV. Oil-bath type
1. Dismantle the air cleaner housing and check its core, make sure it is clean and intact,
otherwise clean or replace.
2. Check oil level and oil quality. If the oil level is too low, add the recommended engine oil up to
oil level mark.
CAUTION:
Never run the engine without an air cleaner, or severe wear of the engine may result.
FUEL AND FUEL TANK
Fuel
To ensure that the engine runs smoothly use only FRESH, UNLEADED GAS WITH AN
OCTANE RATING OF 87 OR HIGHER. Using unleaded gasoline will decrease the possibility of
producing car boll deposit and will prolong the engine’s service life. Never apply used or polluted
gasoline or a mixture of gasoline with engine oil. Make sure the fuel is free of dirt and water.
Gasoline Containing Alcohol
If you decide to use a gasoline containing alcohol (fuel blend), be sure its octane rating is at least
as high as that recommended by the company. There are two types of“gasohol”. One contains
ethanol, and the other contains methanol. Neither gasoline containing more than 10% ethanol nor
5% methanol is allowed to be used. If methanol content in the fuel blend exceeds 5%, it may bring
bad effect on the engine performance, besides, it may damage metals, rubber and plastic parts.
CAUTION: Handle fuel with care because it change plastic and painted surface.
It is normal when you hear occasionally light spark knock or pinking with the engine running under
heavy load.
If “spark knock” or “pinking” occurs at a steady speed under normal load, change brand of
gasoline; if Such phenomena still happen, consult your dealer for help, otherwise the
engine may be damaged.
Fuel Tank
Fuel tank capacity: 3.6liters for 170N , 6.5liters for 190N.
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Check
1. Remove the fuel filler cap and check fuel level.
2. If the fuel level is too low, refuel the tank. Remember adding
fuel not over the fuel filler shoulder.
WARNING:
● Gasoline is extremely flammable and is explosive
under certain conditions. Refueling in a well-ventilation
area with the engine stopped. Do not smoke and smoke
and allow flames or sparks in the area where gasoline
is stored or where the fuel tank is refueled.
● Do not overfill the tank (there should be no fuel in the
filler neck). After refueling, make sure the fuel filler cap
is set back securely.
● Be careful not to spill fuel when refueling. Spilled fuel
or fuel vapor may ignite. If any fuel is spilled, make
sure the area is dry before starting the engine.
● Avoid repeated or prolonged contact with skin or
breathing of fuel vapor. Keep out of reach of children.
STARTING THE ENGINE
1. Push the fuel cock to“ON”.
2. Push the choke lever to “CLOSE”.
NOTE: if the engine is hot, closing the choke is unnecessary.
3. Move left the throttle lever a little.
4. Start the engine as follows:
a) Hand-operated kick-starter Push the engine switch to“ON”. Pull slightly the starting rope handle
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up until feeling anti-action, and then make a rapid pull.
CAUTION:
Releasing the handle suddenly may make it hitting the
engine. Release the handle slowly conforming to its
recoiling force.
b) Electric starter
Push the engine switch to “START”and remain there
until the engine starts. Once the engine starts, reset the
engine switch to “ON”.
CAUTION:
Use the engine switch not more than 5 minutes each time to avoid
damage of the engine. Try once more 10 minutes later after last
attempt failures.
RUNNING THE ENGINE
1. Preheat the engine and push back the choke lever to “OPEN”.
2. Set the throttle lever in proper position to ensure the engine runs
at required velocity.
ENGINE OIL ALARM
The engine oil alarm is designed to function when the engine oil in the crankcase is insufficient.
Lack of engine oil may damage the engine. Oil may damage the engine. Once oil level in the
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