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

Chec before Operation

Start Engine
5 Start Engine
1) When coldstart is performed, the cho e button must be “off” position. When hotstart is
done, the cho e button must be “on” position.
2) Regulate the position of the regulation lever from “low ” to “high”.
Engine Engine for Genset

Start Engine
3) Turn the engine switch to”on” position.
4) If the engine starts in the condition that the cho e button is pulled to “off” position,
when the engine warming up, push the cho e button gently to “on” position. If hot start
is done, the cho e button is ept in “on” position.

Stop Engine
6 Stop engine
In emergency, it is an easy way to stop the engine, just turn the engine switch to “off”.
But as a rule, stop engine as follows:
1) Turn the regulation lever to “low” position.
2) Stop the engine.
Engine Engine for Genset

Engine Maintenance
7 Maintenance
Maintenance schedule
Periodical maintenance
schedule
Every
time
20 hours or
the first
month
50
hours
or
every 3
month
100
hours
or
every 6
month
300 hours
or every
year
Engine oil
Oil level ○
Replace ○ ○
Fine oil filter Replace ○(2) or 200
hours
Air cleaner
Chec ○
Clean ○(1)
Replace ○(3)
Fuel filter Replace ○(1)
Electrolyte
level of battery Chec ○
Spar plug
Chec
&Regulate ○(2)
Replace ○
Valve gap Chec
&Regulate ○(2)
Fuel pipe Replace Every 2 years (2)
○ Maintenance caution
(1) Maintain the engine more frequently in use of dusty area.
(2) The maintenance should be performed by your after-service facilitator unless you
have proper tools and specialized technique.
(3) Only replace element.
Carburetor Modification for High ltitude Operation
At high altitude, the standard carburetor air-fuel mixture will be too rich. Performance will
decrease, and fuel consumption will increase. A very rich mixture will also foul the spar
plug and cause hard starting. Operation at an altitude that differs from that at which this
engine was certified, for extended periods of time, may increase emissions.
High altitude performance can be improved by specific modifications to the carburetor. If
you always operate your engine at altitudes above 5,000 feet (1,500 meters), have your
servicing dealer perform this carburetor modification. This engine, when operated at high
altitude with the carburetor modifications for high altitude use, will meet each emission
standard throughout its useful life.

Engine Maintenance
Replace oil in crankcase
fter warming up the engine, it is easy to drain the engine oil to ensure the engine
oil is rapidly drained out.
1) Place a container under the engine for containing used oil.. Then, remove the oil ruler
and loosen the draining screw and washer,.
2) After drainage of used oil, reinstall the draining screw and washer and tighten them.
In view of environmental protection, please ta e a proper way to dispose the waste oil.
It is recommended to send the waste oil to the local service station or recycle center.
Never throw waste oil barrel to refuse tip, dump the waste oil on ground or in ditches.
3) Place the engine in level position, refill recommended oil to the top line.
The filling capacity of the engine：
Not replace fine oil filter：2.1L
Replace fine oil filter：2.3L
4) Reinstall the oil ruler and tighten filler cap.
Recommended engine oil：
Engine oil for 4-stro e engine:

Engine Maintenance
API classification: SE、SF or equivalent to SG, SAE 10W-30.
If the range of temperature change in your area is limited in the above chart，this oil
grade can be selected according to it.
Maintain air cleaner
If the air cleaner is dirty, it affects air inlet, the power of engine reduced. If the running
place is dust, maintenance must be done more frequently than that shown in
maintenance schedule,..
In the case of no element or element damaged, the dust will be suc ed into
the engine and result in rapid wear of the engine.
Double-element air cleaner
1) Loosen the clip and remove the air cleaner cover.
2) Ta e out the element.
Chec the elements and replace if necessary.
3) Clean air cleaner brac et and cover. Prevent dust from suc ing into the carburetor
along the inlet pipe.
4) Assemble the element..
5) Install the cover and tighten the clip
En ironment temperature
Caution

Engine Maintenance
Spark plug
It is recommended to use spar plug, RC12YC or equivalent one.
Spar plug of incorrect type may damage the engine.
1) Remove the spar plug cap，Clean dust around the spar plug.
2) Unscrew the spar plug with a special soc et wrench.
3) Chec spar plug. If the electrode has damaged, or isolator has bro en, replace the
spar plug. The clearance of the spar plug electrode should be 0.70-0.80mm. Adjust
the side electrode, if necessary.
4) Screw the spar plug with hand carefully to avoid damaging the thread on the head.
5) When the spar plug is in position, tighten the spar plug with the special soc et
wrench and depress the washer.
If install the used spar plug，after depressing the washer, retighten it 1/8-1/4 turn.
6) Reinstall the spar plug cap.
Caution
Spark plug

Engine Maintenance
Regulate idle speed
1. Start the engine outdoor，warm up it for a while.
2. Put the regulation lever to “low” position.
3. Regulate the idle speed with a special tool，ma e
idle speed within the range:
Standard idle speed：1800±200rpm。

Engine Storage
8 Engine storage
After the engine stalling, do not clean the engine till it cools for over half an hour. Clean all
surfaces of the engine and mend the damaged paint film, apply antirust oil on the rusting
area.
Do not rinse the engine with high pressure water, because the water may enter the air
cleaner and the muffler, even enter the cylinder along the inlet line, thus rust may occur.
Do not clean the engine till it is cool, because the water splashed on the hot engine is
harmful to the engine.
1) Place a container under the carburetor (under overflow pipe).
2) Unscrew the draining screw of the carburetor， drain the fuel in the carburetor from
the overflow pipe to the container. After finishing that, tighten the draining screw.
3) When using the engine again, replace oil.
4) Remove two spar plugs.
5) Fill 5lm-10lm oil in the head.
6) Rotate the engine in several turns to
7) scatter the oil in the head.
8) Reinstall the spar plug.
9) Rotate the engine slowly till a drag is felt. In such case, all valves are closed to
prevent the humidity from air.
10) Cover the engine with a dust cap, and place it in dry and ventilating area.
11) In storage，the battery is charged every one month, it will prolong the service life of
the battery.
·The length of time that gasoline can be left in your fuel tan and
Caution