WilTec 92671 User manual

User’s manual
LIFAN 2-cylinder Petrol Engine
92671
Illustration similar, may vary depending on model
Please read and follow the operating instructions and safety information prior to initial operation.
Technical changes reserved!
Illustrations, functional steps, and technical data may deviate insignificantly due to continuous further
developments.

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The information contained in this document may alter at any time without prior notice. No part of this
document may be copied or otherwise duplicated without prior written consent. All rights reserved.
WilTec Wildanger Technik GmbH cannot be held liable for any possible mistakes in this operating man-
ual, nor in the diagrams and illustrations shown.
Although WilTec Wildanger Technik GmbH has made every possible effort to ensure that this operating
manual is complete, accurate, and up-to-date, errors cannot be ruled out entirely.
If you have found an error or wish to suggest an improvement, we look forward to hearing from you.
Send us an e-mail to:
[email protected]
or use our contact form:
https://www.wiltec.de/contacts/
The most recent version of this manual in several languages can be found in our online shop:
https://www.wiltec.de/docsearch
Our postal address is:
WilTec Wildanger Technik GmbH
Königsbenden 12
52249 Eschweiler – Germany
To return your goods for exchange, repair, or other purposes, please use the following address. Atten-
tion! To allow for a trouble-free complaint or return, it is important to contact our customer service team
before returning your goods.
Retourenabteilung
WilTec Wildanger Technik GmbH
Königsbenden 28
52249 Eschweiler – Germany
E-mail: [e-mail]
Tel: [phone]
Fax: [phone]

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Introduction
Thank you for choosing to purchase this quality product. To minimise the risk of injury, we ask you to
always take some basic safety precautions when using this product. Please read this operating manual
carefully and make sure that you understand it.
Keep these operation instructions in a safe place.
This petrol engine offers you:
•2 cylinders, 4 strokes
•Hand starter and electronic starter
•Powerful cooling system
•TCI ignition module
•Fan guard made from special low-noise steel sheet
The leading point in the development of our series of air-cooled 4-stroke petrol engines has been pro-
tection of material and saving of energy. By their compact design, the devices are easy to transport to
every location and comfortable to handle. They offer the user a broad range of application, including
artisanry, industry, horticulture, agriculture, and household.
This user’s manual will assist you in optimally using the engine. Read it thoroughly before putting the
device into operation. This will increase the life time of your device considerably.
Do not hesitate to contact us if you have any question or proposal concerning this user’s manual. In
some cases, the equipment of the device might vary from that described in the user’s manual present.
№
Name
№
Name
1
Air filter
7
Attachment element
2
Choke
8
Oil screw
3
Starter handle
9
Oil level gauge
4
Drain screw
10
Throttle lever
5
Oil filter
11
Exhaust
6
Spark plug

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Safety instructions
For your own safety, obey the following instructions, for otherwise material damage and/or personal
injuries might result.
•Make sure that the engine is only operated in well-aired conditions; otherwise, the exhaust
gases might be harmful to your health.
•Near other persons, only operate the engine with greatest care. Make sure that the exhaust
pipe is free; it must not be covered, obstructed, or blocked.
•Before filling fuel into the tank, make sure to cut the engine off.
•The tank must not be filled to overflowing.
•In case fuel is spilled onto the casing of the device during filling fuel in, absolutely remove it
before starting the engine.
•When exchanging the oil, make sure that the tank cover is closed lest oil get into the tank.
•Do not operate the device near open flames, flammable or explosive materials or gases, and
flying sparks.
•There should be a minimum distance of 1 m between the engine and the wall of a house or
another permanent installation.
•Make sure that all moving and rotating parts are safely covered.
•During operation, certain components of the device (e.g., exhaust pipe) will heat up. When you
touch these components, there is a risk of burns.
•Only operate the device in safe conditions and keep children away during operation.
•Only operate the engine on a level, solid surface. If inclined, fuel might leak.
•A major inclination (the device standing aslope) might impair the lubrication of the gearing mech-
anism even with full oil level.
•When transporting the engine, make sure that no fuel can escape. It is advisable to empty the
tank and to close the fuel supply cock.
Connecting a battery (optional)
Only use 12 V batteries with a minimum of
45 Ah. Connect them to the positive cable
of the relay and the negative cable to the
housing of the engine. Make sure that
there is no corrosion on the cable. Should
there be corrosion on the cable, remove it
first.
№
Name
№
Name
1
Negative cable (–)
3
Positive cable (+)
2
To housing
4
Starting relay
Attention!
•Only operate the engine in a well-ventilated area – with or without battery.
•Avoid any kind of flying sparks, open flames, or the like. Explosion hazard!
•Batteries contain sulphuric acid (electrolyte). Any contact with your skin or eyes can cause se-
rious injuries. Wear suitable protection clothing. Contact the furnisher of the battery used to read
up on suitable measures.

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Connecting a remote control (optional)
Throttle and choke levers have holes for optional cable accessories. The diagram shows the installation
method of single strand cable and woven cable.
a) Remote-controlled choke valve and remote-controlled throttle valve
Figure 2 – woven cable / left control type
Figure 3 – woven cable / right control type
№
Name
№
Name
1
Cable clip (2)
1
Cable clip (2)
2
Choke cable
2
Steel-wire clip
3
Control lever
3
M4×6 mm (2)
4
Throttle cable
4
Control lever
5
M4×6 mm (2)
5
Throttle cable
6
Steel-wire clip
6
Choke cable
7
M5×16 mm (2)
7
M5×16 mm (2)

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b) Remotely controlled throttle valve and manually controlled choke valve
Figure 4
№
Name
№
Name
1
M5×16 mm
4
Rod link bush
2
Cable clip
5
Choke lever
3
Control lever
6
Choke handle
c) Manually controlled throttle valve and manually controlled choke valve
Figure 5 – single strand cable / right control type
№
Name
№
Name
1
Cable clip (2)
4
Throttle cable
2
Steel-wire clip (2)
5
Choke cable
3
Control lever
6
M5×16 mm (2)
Put the levers of both the choke and throttle to control position.

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Before operating the device
1. Make sure that all fuel lines are properly connected and safely fixed lest there be a fuel leak.
2. Make sure that all fixing screws and nuts are well tightened.
3. Check the fuel and oil levels and top up oil or fuel if necessary.
№
Name
№
Name
1
Oil level gauge
3
Min. oil level
2
Max. oil level
№
Name
№
Name
1
Fuel tank
3
Red marking for max. fuel level
2
Tank opening

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№
Name
№
Name
1
Foam filter
4
Hinge
2
Paper filter
5
Air filter cover
3
Air filter housing
The air filter is to be checked and, if necessary, to be cleaned or replaced regularly.
Inclination of output shaft
Allowable inclination
≤20°
Inclination of motor
Allowable inclination
≤20°
START

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Starting the motor
Caution! You should put on a protective equipment before starting the motor (hearing protection,
gloves).
1. Put the fuel cock to the “ON” position (Fig. 9) (optional).
(1) Fuel cock – Fig. 9
(2) Choke knob – Fig. 10
Throttle lever | Fig. 11
2. Put the choke lever to the “CLOSE” position (Fig. 10).
3. Put the throttle to the “FAST” position slowly.
4. Start the motor as follows:
a) Hand starter: Slightly pull the starter rope handle upwards until you feel that it resists, then pull
rapidly.
Figure 12 – (1) Starter rope handle
Figure 13 – (1) Engine switch
Attention! Should you let go the handle suddenly, it might hit the motor. Instead, allow the starter rope
to slide back slowly.
b) Electric starter
Push the engine switch to the “START” position and keep it pushed during 5 s until the motor starts.
Caution! Do not push the engine switch more than 5 s per start to avoid damages to the motor. Wait
10 s before re-trying to start the motor, should the start be unsuccessful. As soon as the motor starts,
put the engine switch to the “ON” position.
c) If the motor dies off when the choke is set to “CLOSE” position, immediately set the choke to
“ON” as soon as the motor runs smoothly.
Figure 14 – (1) Choke knob
Throttle lever – Figure 15

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Set the throttle lever in proper position to ensure the engine runs at the required velocity.
Oil deficiency switch/alarm
The oil deficiency switch reacts to an insufficient quantity of motor oil in the crankcase. Lacking motor
oil may damage the motor. As soon as the oil level in the crankcase is too low, the motor oil alarm stops
the engine automatically to protect it from damages during operation.
Attention! Should you not be able to restart the motor, first check the oil level before checking any other
possible cause of defect.
Motor protection switch
The protection switch that protects the charging circuit of the battery switches off automatically if there
is a short circuit or if the battery poles are connected improperly. The green indicator, jumping out,
interrupts the circuit. Re-set the indicator to its initial position after you have resolved the error that has
triggered the indicator.
Stop/emergency stop
If there is an emergency, stop the motor by putting the engine switch to the “OFF” position. – To stop
the engine in normal operation, proceed as follows:
1. Put the throttle lever to “SLOW” position slowly (Fig. 16).
2. Put the engine switch to the “OFF” position (Fig. 17).
3. Put the fuel cock to the “OFF” position (Fig. 18) (optional).
Throttle lever – Fig. 16
(1) Engine switch – Fig. 17
(1) Fuel cock – Fig. 18
Attention! Never stop the motor suddenly when it operated with the throttle fully opened. Motor dam-
ages might result.
Exhaust regulation system
To keep the exhaust as low as possible, follow the steps mentioned below.
Maintenance
Maintain the motor regularly and according to the maintenance schedule of this manual. The mainte-
nance schedule has been established on the basis of a normal operation and normal conditions. If using
the motor under heavy conditions, with a lot of dust generated, with ongoing humidity, or with high tem-
peratures, you should maintain the motor more frequently.
Exchanging components
It is advisable to use spare parts produced by our establishment or with identical quality. Poor-quality
parts might provoke an increase of exhaust.

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Modifications
Modifying the exhaust regulating system might lead to the actual exhaust emissions exceeding the legal
values. The following are examples for inadmissible modifications:
•Dismantling or modifying any part of the air intake or exhaust system
•Modifying or taking off speed – adjusting connection device or speed adjustment device to result
in the engines running beyond the set parameters
Regular maintenance – maintenance schedule
Frequency
Type of intervention
Every
time
During
the 1st
month or
after 20
hours
Every time
or after 50
hours
After 6
months of
100 hours
Every year or af-
ter 300 hours
Motor oil
Check oil level.
X
Replace.
X
X
Air filter
Check.
X
Clean.
X
Replace.
X
Spark plug
Clean, adjust.
X
Replace.
X
Ignition sen-
sor
Clean.
X
Idling
Check, adjust.
X
Play of valves
Check, adjust.
X
Oil filter
Replace.
X
Petrol filter
Clean.
X
Fuel supply
line
Check.
After 2 years (replace if necessary)

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Technical data
Engine type
Air-cooled 4-stroke V2 engine
Bore×stroke (㎜)
80×74
Displacement (㎤)
744
Compression ratio
8.5:1
Net power (kW⁄rpm)
16⁄3600
Net torque (Nm⁄rpm)
50⁄2500
Ignition type
Non-contact transistorised ignition (TCI)
Starting system
Electric start
Air cleaner
Semi-dry
Oil capacity (ℓ)
1,4
Fuel consumption (g⁄kWh)
≤ 370
Net weight (㎏)
48
Connection diagram
Important Note:
Reproduction and any commercial use (of parts) of this operating manual, requires a written permission
of WilTec Wildanger Technik GmbH.
Yellow
Black Red
Bl
Y
Gr Grey
R
WWhite
Ignition rectifier Bl/R
Spark
plug II
Ignition
coil II
Spark
plug I
Ignition
coil I
Coil
Gr Gr
Battery
Bl
R
R
WBl/W
Starting
motor and
starting relay
Carburettor
solenoid
valve
Bl/Y
Y
YY
Oil
level
switch
Bl/R
Diode
Bl
Engine
connect
ground
Bl/
W
Bl/
YWBl Bl/
R
ST
LD
SAT
E
IG
Eng. switch
OFF
ON
ST
IG E SAT LD ST
W
W
W
Bl
Bl
W
Rectifier
Fuse
type: SA
Gr
Gr