Lifan M70 User manual

OWNER'S MAN-UAL
GENERAL GASOLINE EHGINE
168F-C 16gF-2C,1 70F-C
168FD-C l68FD-2C 170FD-C
CHONGQING LIFAN POWER CO.,LTD.
LTHIN
M70 (170F-C)

PREFACE
Thank you for choosing a general gasoline engine by our company. ::
Based on the latest engine technology at home and abroad, our Co. has individually developed general
gasoline engines with 4-stroke single cylinder, OHV and forced-air cooling. The engines are characte rized, by
advanced design, compact structure, reliable performance, convenient service low fuel consumption and easy speed
adjustment' They are widely used as ideal power in many fields such as generating set, tour, open working, public
place of entertainment, construction machine, agricultural machinery etc. the vital part bodies including cylinder
cover, crankcase, etc, are all cast formed with aluminum alloy. Laser-scanning technology, 3D shaping technology
and CN program processing technology used in the mould production upgrade the engine surface and
manufacturing accnracy obviously. Applying auto-press reducing system and centrifugal fly hammer regulating
system assure that assemblies equipped with the engine function smoothly and reliably as well as the engine start
easily' Besides, the introduction of the lubricant film-sensing protection system prevents accidental damage of the
engine for poor lubrication.
The manual gives information with respect to operation and maintenance of the general gasoline engine, and
be sure to read it carefully first before operating. All the materials and diagrams of this manual are in accordance
with the newest products at the publishing time. Due to revision and other change, the information descried in this
manual may be a little different form 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:
2

A, WARNING
O A warning is used to alert the user to fact Iha|hazardous operation and maintenance procedures may result
in injury to or death ofpersonnel ifnot strictly observed.
CAUTION
O A caution is used to alert the user to fact thathazardous operation and mainJenance procedures may result
in injury to or death ofpersonnel ifnot strictly observed.
NOTE
O A note is used to give helpful information.
This manual book is the part of engine; it must be along with the engine.
J

CONTENTS
Safety Precautions.
Parts Description.. ..
Pre-Operate Inspection.
L Engine Oil....
II. Oil in the reduction gearbox (only for equipped model)....
IIL AiT cleaner..
IV Fuel..
Starting of the Engine.......
Operation.
Stop. ...
Exhaust Control System..
Maintenance.
I. Maintenance schedule.
II. Maintenance method..
l.Replacement of Engine Oil.. .. . .
2.Service ofAir Cleaner............
3.Washing of Deposit Cup ........
4.Spark Plug....
4

5.Spark Eliminator (Option).......
6.Adjustment of Carburetor Idling ... ... ....30
........ ....3 I
,..........32
...........33
...........43
',...,.,..'46
Transport and Storage
Troubleshooting. ... ...
Specifications.........,
Electric Diagram......
5

SAF'ETY PRECAUTIONS
A WARNING
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:
1. Running the engine in a well-ventilated place, keep it at least one meter away ftom 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 on the 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. i
6. Locate the engine on a level-working platform to avoid fuel's spilling outi l
7. Mack sure the fuel filler cap is tightened securely.
The exhaust mufiler 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.
6

PARTS DESCRIPTION
Throttle lever
Choke lever
Air cleaner
Kick-starter
Muffler Fuel tank cop
Fuel tank
Dipstick
Drain plug
Slarting motor
Fuel cock
Starting rope handle
Start control box
- / tr7 t/---{ l-
7
(Pic.1) (Pic.2)

PRE-OPERATE INSPECTION
I .ENGINE OIL ::
CAUTION
O Engine oil is a 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 lubricption, which may shorten the
engine's service life.
O Check the engine with it stopped on a level ground.
SAE Engine oil recommended: SAEI0W-30. As viscosity varies
with regions and temperatures, so the Lubricant has to be
selected in accordance with our recommendation. (pic.3)
Temperature Dipstick
-20
Environment temperature
(Pic.3)
Inspect step:
1. Remove the dipstick and clean it. (pic. a)
2. Reinsert the dipstick into the oil filler without
Screwing in, and check oil level.
Upper lever mark
8
I
III
(Pic.4)

3. If the oil level is too loq add recommended engine oil to the filler neck.
4. Reinstall the dipstick
CAUTION
Run with insufficient engine oil may damage the engine ,*n.r.ty.
II. OIL IN THE REDUCTION GEAR BOX (only for the model equipped with it)
1/2 Reduction gearbox with an auto-centrifugal clutch.
1. Remove the dipstick and clean it. 1ric. 5. Pic.6)
2. Reinsert the dipstick without screwing it in, and then take out it and check oil level.
3. If the oil level is too low, and recommended engine oil until it arrives the upper level mark.
Brand of the oil is the same as that of engine oil.
Oil capacity: 0.50 liters Oiloprcity 0,50litrs Dip!licl
l)lpstick
IJ
(\ z
Upper level mork Drain plug
Uppsr l,evcr Morl
(Pic.5 )
9
(Pic.6)

M.AIR CLENANER
Double-core type (Pic. 7)
Dismantle the air cleaner housing and
check its filter element, make sure it is clean
and intact, otherwise clean or replace it.
Semi -dry type (Fig. 8)
a) Remove the air cleaner housing and check
the filter element for dirt and impurity.
Clean or replacement should be d.one if
necessary.
b) Check the air cleaner for dirt, and remove it
if any.
a
Air cleaner housinB
l'ilter clement
Air cleaner housing
l'ilter elemcnt
^@r@
\4\/ w/t,
Pic.7
10
Pic.8

Oil - bath type (Fig.9)
a) Dismantle the air cleaner housing and check its core, make sure it is clean and intact, oth-
erwise clean or replace it. --:
b) Check oil level and oil quality. If the oil level is too low, add recommended engine oil to oil level
mark. ' *
Filter element
Filter element
@
Filterelement+
Pic.9
11

IV. FUEL
1. Gasoline is extremely flammable and may explosive under certain conditions.
2. Refueling in a well - ventilation area with the engine stopped. Do mot smoke and allow flames or sparks
In the area where gasoline is stored or where the fuel tank is refueled.
3. 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.
4.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.
5. Avoid repeated or prolonged contact with skin or breathing of fuel vapor. Keep out of reach of children.
Fuel tank capacily : 3. 6liters
The engine must apply unleaded gasoline with an octane number over 86.Using unleaded gasoline will decrease the possibility ofproducing
carbon deposit and prolong the engine's service life.
Never apply used or poiluted gasoline or a mixture of gasoline and engine oil. Make sure the fuel is free of dirt and water.
CAUTION
OHandle fuel with care because it can damage plastic and painted surfaces. It is not in our guarantee range of
damage by fuel spilling. l
OIt ls normal when you hear occasionally light spark knock or pinking with the engine running under heavy load.
O ShoutAsparkknockorpinkingbeheardataspeedundernormalload,changebrandofgasoline;IfsuchphenoLenonstillhappens,consult
your dealer for help, otherwise, the engine may be damaged.
12

Pic.10
CAUTION
The engine would be damage when it is running with constantly knock or pinking noise. It is not in our warranty range that its damage by
misusage the engine l
l3

STARTING OF THE ENGINE
l.Push the fuel switch to ,.ON',. (pic.l1)
Fuel guard
rrON
(Pic. t l)
NOTE
Ifthe engine is hot, closing the choke is unnecessary
3.Move left the throttle lever a little. (Pic13)
2.Push the ckobk lever to "OFF". (Pic.12)
,Cho lever
Of f--.
(Pic.12)
Thtottle lever
Hight --. 1_eyy
(Pic.l3)
t4

4.Start the engine
a). Rope handle Starter.
Push the engine switch to "ON". (Pic. 14)
and then make a rapid pull. (Pic. 15)
Ensine switch
Pull slightly the starting rope handle up until feeling anti-action,
Slorting hondl
Starter
l
@rON
(Pic. 14) (Pic. ls)
CAUTION
Releasing the handle suddenly may make it hitting the engine. Release the handle slowly conforming to its
recoiling force.
2) Elechic starter
Push the engine switch to "srART" and iemain there until the engine Start. @ic. 16)
15
Ensine switch @ic. 16)

CAUTION
Use the engine switch not more than 5 second each time to avoid damage of the engine. Try once more 10
second later after last attempt failures. ::
Once the engine starts, reset the engine switch to "ON".
OPERATION
l.Preheat the engine and push back the
choke lever to "ON".(Pic.17)
Cho lever
r.zON
(Pic.l7)
2. Set the throttle lever in proper poSition to ensure
the engine runs at required velocity.(Pic.18)
Throttle lever
Hight -. r Low
(Pic.l8)
16

* Engine OitAlarm
The engine oil alarm is designed to alarm the user the fact that the engine oil in the crankcase in insufficient.
Run with insufftcient engine oil may damage the engine. Once oil level in the crankcase is too low, the engine oil
alarm will stall the engine automatically to make it free of damage while the engine switch is still at "ON".
CAUTION
If the engine still fails to work, check the engine oil level first before go to other check items
Breaker (Electric start)
Breaker is used to protect the battery charging circuit. It will be disconnection when short circuit or battery polarity
connects in wrong direction. (Pic . 19)
Switch
(Pic.19)
OFF
o
F€
tr
17

The green indicator would be light once the circuit off. If this happens, please find out the reason and
solve it then press the button to recover the breaker
* Operating on Highlands -_:
On highlands, the standard mixture ratio is relatively too big so the engine performance may be impaired
while the fuel consumption may increase. This problem can be solved as follows: replace the main jet of carburetor
with a smaller one, then, adjust the idly screw. If always using on highlands with a height above sea level of 1830
meters, ask your dealer for doing the job
The engine power will decrease by about 3.5y, wirhevery 305 meters up in height; even the proper main jet is used.
The output would be much lower if not adjust the jet.
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 thin, output drops and the engine overheats for operation in low altitude
area. In the case, ask your dealer to recover the engine to its normal technical status.
18

STOP
In an emergency, push the engine switch to "OFF" to stall the engine. Stop it ir1,_normal in the following sequence:
1. Push right the throttle valve lever to the bottom (Pic. 20)
Throttle lever
Hight - rLow
(Pic.20)
3. Set the fuel switch to '.OFF" (Pic.22) Fuel guard
(Pic.22)
2. Push the engine switch to "OFF" (Pic. 21)
Engine switch
(Pic.21)
)oF[
L9

EXHAUST CONTROL SYSTEM
With the engine running, carbon monoxide, oxide of nihogen and hydrçrcarbon will produce, and in certain
conditions, oxide of nitrogen and hydrocarbon will react chemically each other to make smoke while carbon
monoxide is toxic, so exhaust control of them is very important. The company decreases the exhaust emissions by
introducing poor-fuel carburetors and other devices into the engine to solve the problem.
To keep the exhaust of your engine within the standard exhaust emission values, pay attention to the following:
I. MAINTENANCE
Maintain the engine periodically in accordance with the Maintenance Schedule in the manual. The maintenance
schedule is made out on the base of normal use in normal conditions, if using under hear,y load, dusty or wet
circumstances or in high temperature, more frequents maintenance will be necessary.
II. REPLACEMENT OF PARTS
We recommend that you should choose such parts, which are manufactured by our Co. or equivalent to these in
quality as replacement ones. Replacement without so high quality may impair the exhaust control system in
effectiveness
i
III. MODIFYING
Modifying the exhaust control system may make actual exhaust emissions exceeding.statutory limit valueç. Illegal
modification is as follows:
l.Dismantle or modiff any partof air inlet or outlet system.
2.Modi$, or take offspeed-adjusting connection device or speed adjustment device to result in the engine's running
20