Lifan M25 User manual

OWNER'S MANUAL
GENERAL GASOLINE ENGINE
152F-3
LTHIN
CHONGQING LIFAN POWER CO.,LTD.
M25 (152F)

PREFACE
Thank you for choosing a general gasoline engine by the company.
Based on the latest engine technology at home and abroad, our Co. has individuaily developed general gasoline
engine with 4-stroke single cylinder, OIIV and forced-air cooling. The engine is characterized by advanced design,
compact structure, reliable performance, low noise and small vibration. It is widely used as ideal power in many
fields such as small-scale water pump, generator set, cropper, thresher; garden machinery etc.
The manual gives information with respect to operation and maintenance of the general gasoline engine. Please
read it car.efully first before operating. To extend the serrrice life, users should strictly follow the stipulations stated in
the manual to cany out operating and maintenance.
This manual should be considered a permanent part of the engine and should remain with it if it is resold.
All the matetials and diagrams of this manual are in accordance with the newest products at the publishing time.
Due to 1evision and other change, the information descried in this manual may be a little different from the actual
status. The copyright of this manual belongs to our Co, any group or individual is forbidden to reprint or copy any it.
The manual is subject to change without notice.
Please pay special attention to statements preceded by the following words.
/1

WARNING
A A warning is used to alert the user to fact that hazardous opera'ting and maintenance procedures may
result in injury to or death ofpersonnel ifnot strictly observed.
CAUTION
A caution is used to alert the user to fact that hazardous operating and maintenance procedures may
result in damage to or destruction of equipment if not strictly observed.
NOTE A note is used to give helpfut information.
Although the engine conforms to the safety requirement of EN1679-1, the user must notice the possible danger when
they install the engine with other terminal products because the different installing purposes maybe will result in new
danger to the engine and its driving product. So, all users must be responsible to take action for assuring the safety.
Ita

CONTENTS
SAFETY PRECAUTIONS 1
3
4
7
PARTS DESCRIPTION
PRE-OPERATION IN SPECTION..
STARTING T}IE ENGINE ...............
STOPPING THE ENGINE ............... t1
t2
l9
2t
23
MAINTEMANCE....
TRANSPORT AND STORAGE ...
TROUBLESHOOTING
SPECIFICATIONS........
ut1

SAFETY PRECAUTIONS
A\ryARNING
Before operating the engine, be sure to read and familiar with the manual carefully, otherwise injury to
personnel or damage to equipment may occur.
Please pay special attention to the following:
l. Always make a pre - operation inspection before you start the engine. You may prevent an accident or equipment
damage.
2. To prevent fire hazards and to provide adequate ventilation, keep the engine at I mater away flom buildings and
other equipment during operation. Do not place flammable objects close to the engine.
3. Children and pets must be kept away. From the area of operation due to a possibility of bums from hot engine
components or injury from any equipment the engine may be used to operate.
4. Know how to stop the engine quickly, and understand the operation of all controls. Never permit anyone to operate
the engine without proper instructions.
5. Do not place flammable objects such as gasoline, lighter, etc. Close to the engine while it is running.
6. Refuel in a well - ventilated area with the engine stopped.
7. Do not overfrll the fuel tank. There should be no fuel in the filler neck.
8. After refueling, make sure that the filler cap is closed securely.

9. f any fuel is spilled, clean it up completely and make sure the area is dry before stading the engine.
10. Do not smoke or allow flames or sparks in the area where gasoline is stored olwhere the fuel tank is refueled.
11. Never run the engine in an enclosed area. The exhaust contains poisonous carbon monoxide (CO) gas that can
cause loss of consciousness and lead to death.
12. Localethe engine on a firm working platform without an slant exceeding 20' to avoid fuel's spilling out.
I 3. Do not place any objects on the engine
14. The exhaust muffler is very hot during nrnning 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.
2
t'

PARTS DESCRIPTION
The main parts of engine are located as follows (Fig. 1)
Fuel filler cap
uel tank
Air cleaner Engine switch
Oilplug
Slarter handle
Fig. I
3

PRB _ OPERATION INSPECTION
I . ENGINE OIL
CAUTION
O Engine oil is a key f'actor in deciding the engine's performance. Do not apply engine oil with additives or 2
- stroke gasoline engine oil, as they haven's enough lubrication, which may shorten the engine's service life.
O Check the engine with it stopped on a level ground.
SAEI0W - 30 (Fig.2) is recommended for general, all temperature use.
As viscosity varies with regions and temperatures, so the lubricant has
to be selected in accordance with our recomrnendation. If single viscosity
engine oil is to be used instead, its viscosity corresponding to average îsmp.rârurô
temperature of the region must be considered. lrrrrrlr
-t! 't0 .t0 0 r0 20 30 {s'c
Environmsnt TemFêrature
Fig.2
1. Ensule 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
in, and check oil level.
4. If the oil level is too low, add the recommended engine
oil to the oil filler nick.
5. Reinstall the dipstick.
IUpper lever
SAE
v
t1
4
Dck
Fig.3

CAUTION
Run with insufficient engine oil may damage the engine severely.
II. AIR CLEANER ":
Check the filter element for dirt, and remove it if any.
CARTION
Never run the engine without an air cleaner, or severe wear ofthe engine may occur.
m. FUELAND FUELTANK (Fig.a)
l. Fuel
The engine must apply unleaded gasoline or low - leaded gasoline. Using unleaded gasoline will decrease the
possibility ofproducing carbon deposit and prolong the engine's service life.
Never use an oil gasoline mixture or dirty gasoline. Avoid getting dirt, dust or wàter in the fuel tank.
2.FuelThnk æ
Fuel tank capacity: 1.3 liters
Fig.4
5
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A wARNING
O Gasoline is extremely flammable and is explosive under certain conditioùs.
O Refueling in a well - ventilation area with the engine stopped. Do not smoke and allow flames or sparks in
the area where gasoline is stored or where the fuel tank is refueled.
O Do not overfill the tank (there should be no fuel in the filler neck). After refueling, make sure the fuel tank
cap is set back securely.
O 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 enough before starting the engine.
O Avoid repeated or prolonged contact with skin or breathing of fuel vapor.
O Keep out ofreach ofchildren.
ù'
6

STARTING THE ENGINE
1. Push the fuel cock to ON position (Fig.5) Fuel
Fig.5
2. Push the choke lever to the OFF position (Fig. 6).
Chock lever
1
OFF""
Fig.6
NOTE
Do not the choke if the èngine is rvarm or the air temperature is high.
7
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3. Move down the throttle lever slightly to the FAST position (Fig. 7)
4. Start the engine (Fig. 8).
a) Push the engine switch to the ON position.
b) Pull slightly the starting rope handle up until feeing anti-action, and then make a rapid pult.
CAUTION
Return the starting rope handle gently to prevent damage to the starter.
Slow
Fast
Throttle lever
Fig.7 Fig.8
ôrr
î
switch
I
t/'

6. Gradually move the choke lever to the OPEN position. Warm up
Chock levpr
t
OFF
the engine until it runs smoothly (Fig. 9).
7. Set the throttle lever in proper position to ensure the engine runs at
required velocity (Fig. l0).
Fig.9
Slow
Fast
Throttle lever
Fig.lo'
9

tk Operating on Highlands
On highlands, the standard cal'bul'etor airlfuel mixture is relatively too rich so the engine performance may be
impaired while the fuel consumption may increase. a-:
High altitude performance can be improved by installing a smaller diameter main fuel jet in the carburetoq and
readjusting the idle needle screw aird the idle adjust screw. If you always operate the engine at altitudes higher than
1830m above sea level, ask your dealer for adjusting the carburetor.
The engine power will decrease approximately 3.5o for every 305,meters increase in altitude, even the proper
main jet of carburetor is used. The affect of altitude on power will be greater than this if no carburetor modification is
conducted.
CAUTION
The engine equipped with the main jet applicable to highlands may be damaged seriously in area below
specified altitude, because its mixture ratio is too lean, output drops and the engine overheats for operation in
low altitude area. In the case, askyour dealer to recover the engine to its normal technical status.
10

STOPPINGTHE ENGINE
In an emergency, push the engine switch to "OFF" to stall the engine. Stop it in normal in the following
sequence:
l. Push up the throttle lever to the SLOW position (Fig. I l).
2. Push the engine switch to the OFF position (Fig. l2).
el^.,,
I
Fast
Throtlle lever
Fig.l l
3. Set the fuel cock to the OFF position (Fig. 13).
switch
Fig.l2
Fuel cock
,l
OFF
lt
Fig.l'3 "

MAINTEMANCE
A wARNTNG t-:
O Shut off the engine before performing any maintenance.
O To prevent accidental start - up, tum OFF the engine switch and disconnect the spark plug cap.
O The engine should be serviced by your dealer unless the owner has proper tools and service data and fells it is
mechanically qualified.
I . MAINTENANCE SCHEDULE
Periodic inspection and adjustment of the engine is essential if high level performance is to be maintained.
Regular maintenance wili also ensure a long service life. The required service intervals and the kind of maintenance
to be performed are described on the table below.
L2

Maintenance Schedule
Frequency
Item Each time First month or 20 hrs
Each season
or 50 h's Every 6-month or l00hrs Each year
or 300 hrs
Engine oil Oil level check
Replace
Air cleaner Check
Clean
Deposit cup Clean JO
Spark plug Check/Clean
Valve clearance Clean ^t@
Combustion chamber Clean .t@
Fuel tank & fuel filter Clean ^t@
Fuel supply line Clean Every fwo years (do a replacement if necessary) @
CAUTION
Use only genuine parts manufactured by the company or equivalents in qualityl otherwise damage to
equipment may occur.
NOTES
O fn" item should be serviced more often than that in the schedule if used in dusty circum-stances.
@ fn" items should be done by your dealer unless you are specially trained and is well equipped with tools.
l3

II.REPLACEMENT OF ENGINE OIL
Oil filler IUpper
I
t
Washer
Drain plug
Fig.l4
A still hot engine is helpful to drain out the engine oil in the crankcase rapidly and entirely.
a) Turn offthe oil hller cap and drain plug to drain engine oil thoroughly.
b) Reinstall the drain plug and screw in securely.
c) Fill the specified engine, and check tle oil level.
d) Reinstall the oil filler cap.
Engine oil capacity: 0.3L
CAUTION
Do not contact engine oil repeatedly for long - time, otherwise, it may cause skin cancer. Wash your
hands with soap and water immediately after handling oil.
t1
t4

NOTE
Do not dump oil containers or discarded engine oil into rubbish bexes or onto the ground .For the sake of
environmental protection, we suggest you take in discarded engine oil with a closed container and bring to
local recycling station.
M. SERVICE OFAIR CLEANER
A difiy air cleaner may block enough air's flowing into the carburetor. To prevent the carburetor from
producing of trouble, please seruice the air cleaner periodically. If operating the engine in extremely dusty area, the
job should be done more often.
A wARNING
Never clean the air cleaner core in gasoline or low flash - point detergents, or explosion may happen.
CAUTION
Never run the engine without an air cleaner, or air with dirt and dust may enter the engine so speed the
engine's wear.
1. Remove the air cleaner cover, take out the element.
2. Wash the element in a nonflammable or high flash point solvent and dry it thoroughly.
3. Soak the element in clean engine oil until it becomes saturated, and then squeeze out the excess oil.
4. lnstall the removed parts in the reverse order ofremovai.
15

IV. WASHING OF DEPOSIT CUP O-ring
Fuel cock
Deposit cup
Fig.l5
Set the fuel cock at "OFF" , remove the deposit cup and O - ring, Wash them in nonflammable or high flash
point cleansing solvents, and then dry them up, at last , carry out reinstallation. Set the fuel cock to "ON" and check
for leal$"
A wARNING
O Gasoline is extremely flammable and explosive in certain conditions. Keep cigarette, sparks and open
flames away.
O After reinstalling the deposit cup, check it tbr leakage and make sure the area around the engine is dry
enough.
V. SPARK PLUG
Spark plug recommended: 255
Proper spark plug clearance ensures the engine's normal running under no deposit around the spark pltr.g.
t6