LONCIN 2V90FD User manual

Owner’s Manual
2V90FD

Thank you for your purchasing our Engine.
Please keep this manual in proper place so as to read it for reference at any time.
Take this manual as a part of the engine. If the engine is resold, it is required to transfer the engine
with the manual.
Our abides by the continuous development strategy therefore, our reserves the right of
modification of product and revision of the manual without any notice.
Copy right○ our company All rights reserve.
It is prohibited from reproducing, transferring, distributing and memorizing any content in the
manual without obtaining a written approval from our General-purpose Engine Co in advance.

Contents
1.Safety................................................................................................................................................2
2.Parts and component names.............................................................................................................3
3.Use of engine...................................................................................................................................4
Engine switch................................................................................................................................4
Choke button.................................................................................................................................4
Regulator lever..............................................................................................................................4
Engine oil protecting system.........................................................................................................5
4. Check before operation...................................................................................................................6
Routine inspection........................................................................................................................6
Check engine oil...........................................................................................................................6
Check air cleaner...........................................................................................................................7
5.Start engine……………..................................................................................................................8
6.Stop engine.....................................................................................................................................10
7.Maintenance
Maintenance schedule.................................................................................................................11
Replace crank case oil.................................................................................................................12
Maintain air cleaner.....................................................................................................................13
Spark plug...................................................................................................................................14
Regulate idle speed.....................................................................................................................14
8. Engine storage...............................................................................................................................15
9.Troubleshoot..................................................................................................................................16
10.Battery..........................................................................................................................................19
11.Engine parameters........................................................................................................................20
12.Wiring diagram............................................................................................................................21

Safety
1. Safety
Consumers’ responsibility
Before operating the engine, it is required to read the manual carefully and understand it,
otherwise hurt to body or damage to engine may occur.
Be familiar with controlling and operating the engine and emergency stop, it is only allowed to
operate the engine by authorized person.
Children are not allowed to operate the engine on no account and children and pets must be far
away from the operating site.。
Caution for filling fuel
Petrol has an extreme inflammability. Fill fuel in opening air and in good ventilation
condition, the engine is stopped.
Prohibit smoking, keep flame away from naked flame and spark while filling fuel.
Do not start engine while the splashed petrol drips remain.
Hot exhaust
When the engine works, the muffler is heated to high temperature, even the engine stopped
after a while. Be careful to keep your hand beyond the touch with the muffler. Do not store the
engine in room till it is cool.
To prevent fire, keep the engine 1m away from the wall or other devices. And of course, the
inflammable substance should be placed further away from the working engine.
Carbon monoxide intoxication
The emission from the engine contains toxic carbon monoxide, avoid absorbing the emission
in.
Do not operate the engine in enclosed cabinet or in poor ventilation condition.

Part and Component Names
2. Part and component names
Serial number ：
T***YYMM*******
YYMM is year and
month of manufactured

Use of Engine
Serial number ：
T***YYMM*******
YYMM is year and
month of manufactured

Use of Engine
3 Use of engine
1) Engine switch
The engine switch is a ignition circuit for starting and stopping engine.
When the engine switch turns to “on” position, the engine runs, when the switch turns to
“off” position, the engine stops.
2) Choke button
The function of the cho e button is to open or close the cho e valve in the carburetor.
When pull out the button, the cho e valve is closed, in such case, it is prone to start the
cold engine. When the engine wor s normally, it is required to push the cho e button in,
that is to say the cho e valve is in opening position,

Use of Engine
3) Regulation lever
Regulate the position of the regulation lever to get the desired speed.
For a reasonable speed of the engine, please refer to indicated parameters of the
matched device.
4) Engine protecting system
The engine protecting system is designed to protect engine from damage because of lac
of oil in the cran case. When the engine oil is lower than the safe level line, the engine
protecting system will wor to stop the engine automatically (the engine switch is still in
“on” position).
If the engine stops automatically but can not start again, first of all, chec the oil level, if
fault remains, do other inspection.

Chec before Operation
4 Check before operation
Routine inspection
Observe the lea age of engine oil and fuel.
Observe damage.
Chec guard cover and cap position, and the tightness of screw, bolt and nut.
Check engine oil
After stalling, place the engine in level position, then chec oil level.
1) Pull out the oil ruler and clean it.
2) Plug in the ruler thoroughly and ta e it out again to chec the oil level.
3) If the oil level is lower than the low limit, remove the filler cap and fill the
recommended oil till it goes up to the top limit.
4) After filling, eep in mind to reinstall the ruler and tighten the cap.
Caution

Chec before Operation
When the engine oil level is lower than the safe line, the engine protecting system will
stops the engine automatically. To avoid engine stalling accidentally, chec the oil level
before starting the engine each time.
When filling fuel, the fuel level does not exceed shoulder of fuel filter (i.e.
top level).。
It is recommended to fill lead free petrol, grade No 90 or higher.
When use lead free petrol, carbonized dirt is less, thus it can prolong the service life of
exhaust system.
It is prohibited to use waste fuel, contaminated fuel and fuel mixed with engine oil.
Check air cleaner
Remove the air cleaner case to chec the element，clean or replace, if necessary.
Caution