Rato R100 User manual

R100 R160 R180 R200 R210 R225
R270 R300 R390 R420 R440
Gasoline Engine
Owner’s Manual
Chongqing Rato Technology Co.,Ltd.

·1 ·
PREFACE
Thank you for choosing our general-purpose gasoline engine.
The manual gives information with respect to operation and maintenance
of the R100 R160 R180 R200 R210 R225 R270 R300 R390 R420 R440,
general-purpose gasoline engines, and be sure to read it carefully first
before operation. Only operate as the manual tells, can insure user’s
safety and get the best results of the engine operation.
All information and diagrams of this manual are in accordance with the
newest products at the publishing time. If revision and other change the
information descried in this manual are a little different from the actual
status, our company will explain it. Our company reserves the right
to make change at any time without notice and without incurring any
obligation. No part of this publication may be reproduced without written
permission.
This manual should be considered a permanent part of the engine and
should remain with the engine if it is resold!

·2 ·
SAFETY MESSAGES
Your safety and the safety of others are very important. We have provided
important safety messages in this manual and on the gasoline engine.
Please read these messages carefully.
A safety message alerts you to potential hazards that could hurt you
or others. Each safety message is preceded by a safety alert symbol .
Symbol is as following:
You CAN be KILLED or SERIOUSLY HURT if you
don’t follow instructions.
You CAN be HURT if you don’t follow instructions.
Your generator or other property could be damaged if
you don’t follow instructions.
Give you helpful information.

·3 ·
CONTENTS
PREFACE …………………………………………………………… 1
SAFETY MESSAGES ……………………………………………… 2
CONTENTS ………………………………………………………… 3
I. SAFETY PRECAUTIONS ………………………………………… 4
II. PARTS DESCRIPTION …………………………………………… 6
III. BATTERY CONNECTION ……………………………………… 7
IV. PRE-OPERATE INSPECTION ………………………………… 9
V. STARTING THE ENGINE …………………………………… 13
VI. RUNNING THE ENGINE …………………………………… 16
VII. STOPPING THE ENGINE …………………………………… 18
VIII. EXHAUST CONTROL SYSTEM…………………………… 19
IX. MAINTENANCE……………………………………………… 20
X. RANSPORT AND STORAGE ………………………………… 24
XI. TROUBLESHOOTING ……………………………………… 25
XII. SPECIFICATIONS …………………………………………… 30
XIII. ELECTRIC DIAGRAM …………………………………… 33
CONTENTS

·4 ·
I. SAFETY PRECAUTIONS
Indicate a possibility of invalid warranty and personal
or equipment damage if instructions are not followed.
Please pay special attention to the following:
1. Strictly set the engine according to the regulated power on the owner's
manual. Do not overload, overrun the engine or run it with low load
and at low speed in a long time.
2. Use regulated brand of gas and diesel. The fuel should be fully
deposited and ltrated before use. Keep clean the fuel ller, change
the oil periodically.
3. Periodically check the installation, connection and the degree of
tightness of the xed bolt. Tighten it if necessary.
4. Periodically clean the element of the air cleaner, change it when
necessary.
5. The gasoline engine is air-cooled, so clean the radiator, wind cover
and fan in time in order to make the engine cool normally.
6. The operator should be familiar with the working principle and
structure of the gasoline engine, knowing how to make an emergent
stop and the operation of all controlling parts. Any one without
training is forbidden to operate the engine. Keep periodical
maintenance. Solve problems in time. Do not run the engine in spite
of malfunction.
7. Running the engine in a well-ventilated place, keep it at least one
meter away from building walls or other equipments, keep away from
SAFETY PRECAUTIONS

·5 ·
inammables such as gasoline, matches and so on to avoid possibility
of re.
8. Refuel in a well-ventilated area with the engine stopped, do not smoke
and do not allow ames or sparks in the refueling area.
9. Do not overfill the fuel tank to avoid fuel’s spilling out. If there is
spilled fuel around, be sure to clean it thoroughly before starting.
10. Do not run the engine inside the buildings or enclosure areas.
11. The exhaust mufer 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.
12. Safe warning label:
Please carefully read warning label before operating. Our company
will not accept any responsibility for person hurt, or equipment
damaged caused by disregarding this warning label.
SAFETY PRECAUTIONS
STARTER HANDLE
OIL DIPSTICK
DRAIN PLUG

·6 ·
II. PARTS DESCRIPTION
PARTS DESCRIPTION
SPARK PLUG
MUFFLER
RECOIL STARTER
FUEL COCK
THROTTLE LEVER
STARTER HANDLE
ENGINE SWITCH
OIL DIPSTICK
OIL DRAIN PLUG
FUEL TANK
CHOKE LEVER
AIR CLEANER
CARBURETOR
CHOKE LEVER
OIL PROTECTOR
OIL PLUG

·7 ·
III. BATTERY CONNECTION
Use 12V and more than 18AH battery, connect its positive lead to start
relay terminal while connect its negative lead to engine mounting screw,
base screw or other grounding point with the engine.(See the following
picture)
Check the battery's connecting point; make sure that it is tight and not
rusted. If rusted, clean and connect.
1) Thebatterymaygiveoffexplosivegas,keepsparks,amesand
cigarettes away. Charge or use it indoors with good ventilation.
2) The battery contains sulphuric acid (electrolyte). If contact with
skin or eyes may cause severe burns. If electrolyte gets in your
skin,ushwithwater;ifgetsinyoureyes,ushwithwaterforat
least 15 minutes and call a physician at once.
3) Electrolyte is poisonous. If swallowed, drink large quantities of
BATTERY CONNECTION
CATHODE WIRE(-)
START RELAY
ANODE WIRE(+)

·8 ·
BATTERY CONNECTION
water or milk, and follow with milk of magnesia or vegetable oil
and call a physician.
4) Keep out of reach of children.
1) Do not add tap water to the battery instead of distilled water,
otherwise the battery service life will be shortened.
2) Do not add distilled water over the electrolyte upper level mark, if
not, electrolyte will spill out and corrupt the engine part. If so, be
sure to wash them away with water.
3) Make sure not to connect the battery leads in reverse order,
otherwise short-circuit or breaker’s trip may be result in.

·9 ·
IV. PRE-OPERATE INSPECTION
1. ENGINE OIL
Use 4-stroke engine oil, API service classification SE class or
equivalent. Check the API service label on the oil container to be sure
it includes the letters SE class or equivalent .
SAE 10W-30 is recommended
for general use. Other viscosities
shown in the chart may be used
when the average temperature in
your area is within the indicated
range.
Oil level check
Check method:
1) Remove the dipstick and clean it.
2) Reinsert the dipstick into the oil lling hole without screwing it, and
check oil level.
3) If the oil level is too low, add the recommended engine oil up to the
oil lling neck.
4) Reinstall the dipstick.
5) Lubrication oil capacity: R100 0.35L
R160 R180-3 R200 R210 R225 0.6L
R270 R300 R390 R420 R440 1.1L
ENVIRONMENT TEMPERATURE
SAE VISCOSITY GARADES
PRE-OPERATE INSPECTION

·10 ·
Run with insufficient engine oil may damage the gasoline engine
severely and that is not within valid warranty.
2. AIR CLEANER
Dismantle the air cleaner cover and check its element to make sure
it clean and complete. Clean or replace it as necessary( see page 22:
maintenance of air cleaner ).
Never run the engine without an air cleaner, or severe wear of the
engine may be resulted in. That is not within the valid warranty.
3. FUEL RECOMMENDATION
1) Remove the fuel tank cap and check fuel level.
2) If the level is too low, refuel the tank. Remember adding fuel not
PRE-OPERATE INSPECTION
OIL DIPSTICK
OIL UPPER LEVEL
DRAIN PLUG
OIL LOWER LEVEL

·11 ·
over the fuel ller shoulder.
1) Gasoline is extremely flammable and is explosive under certain
conditions.
2) Refueling in a well-ventilation area with the engine stopped. Do
not smoke and do not allow flames or sparks in the area where
gasoline is stored or where the fuel tank is refueled.
3) Donotoverllthefueltank(thereshouldbenofuelinthelling
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
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 capacity: R100 2L
R160 R180-3 R200 R210 R225 3.6L
R270 R300 R390 R420 R440 6.5L
PRE-OPERATE INSPECTION
FUEL FILLER SHOULDER
FUEL FILLER
MAXIMUM FUEL LEVEL

·12 ·
Fuel may damage the oil paint and plastic. Be careful not to spill fuel
when refueling. Any damage due to oil spilling is not within valid
warranty.
"Light knocking" or "spark exploding" sound can be hear when the
engine overloading. It is normal. Do not be worry about that.
If " knocking" or "spark exploding" sound occur at a steady speed
undernormalload,changebrandofgasoline;ifsuchphenomenastill
happen, consult your dealer for help, otherwise the engine may be
damaged.
When the engine is running, continuously "Knocking" or "spark
exploding" sound occurring will damage engine.
"Knocking" or "spark exploding" sound from misusing will not be
within the valid warranty.
PRE-OPERATE INSPECTION

·13 ·
STARTING THE ENGINE
V. STARTING THE ENGINE
1. Turn the fuel cock to the “ON” (OPEN) position.
2. Turn the choke lever to the “CLOSE” (OFF) position.
If the gasoline engine is hot, don’t close the choke.
FUEL COCK
OFF ON
OFF
CHOKE LEVER

·14 ·
3. Move governor lever to left a little.
4. Start the engine
1) Recoil starter:
Turn the engine switch to the “ON”
(OPEN) position.
Pull the starter grip lightly until
resistance is felt, then briskly.
Don’t allow the starter grip to
snap back against the engine.
Return it gently to prevent
damage to the starter
STARTING THE ENGINE
THROTTLE HANDLE
HIGH SPEED
LOW SPEED

·15 ·
2) Electric start
Turn the engine switch to the
“START” position, and hold it there
until the gasoline engine starts. When
the engine starts, allow the engine
switch to return to the “ON” position.
Do not use the starter for more
than 5 seconds or starter motor damage may occur. If the engine fails
to start, release the switch and wait 10 seconds before operating the
starter again.
STARTING THE ENGINE

·16 ·
VI. RUNNING THE ENGINE
1. Preheat the engine and push back the choke lever to the “OPEN”
position.
2. Move the throttle lever to proper position to make the gasoline engine
run at required velocity.
ENGINE OIL ALARM
The engine oil alarm is designed to function when the engine oil in the
crankcase is insufficient. Lack of 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”.
RUNNING THE ENGINE
CHOKE LEVER
THROTTLE LEVER
ON

·17 ·
RUNNING THE ENGINE
Ifcannotrestarttheengine,checktheengineoillevelrstbeforego
to other check items.
BREAKER (Electric-start type)
The breaker will cut off automatically to protect the charging circuit of
the battery in the case that short circuit or incorrect connection of the
battery poles occurs.
The green indicator in the breaker will jump out with the circuit cutting
off. After nding troubles and troubleshooting, depress the breaker button
to turn the breaker on.
HIGH ALTITUDE OPERATION
At high altitude, the standard air-fuel mixture will be too rich.
Performance will decrease and fuel consumption will increase. A very
rich mixture will also foul the spark plug and cause hard starting. High
altitude performance can be improved by specific modifications to the
carburetor. If you always operate you trimmer at altitudes above 1000
meters, have your servicing dealer perform this.
Modified engine applicable to altitude may be damaged seriously
in area below altitude of 1000 meters for overheating, because its
mixture ratio is too small for operation in low altitude area. When
the carburetor has been modified for high altitude, operation the
air – fuel mixture will be to lean for low altitude use. Operation at
altitudes below 1000 meters with a modified carburetor may cause
the engine to overheat and result in serious engine damage.

·18 ·
VII. STOPPING THE ENGINE
In emergency, push the engine switch to the OFF”.
In normal, please do as following:
1. Push right the throttle lever to low speed position.
2. Push the engine switch to the “OFF” position.
3. Set the fuel cock to “OFF” position.
Sudden stopping at high speed under
heavy load is forbidden, otherwise
damage will result.
STOPPING THE ENGINE
THROTTLE LEVER
FUEL COCK
ENGINE SWITCH
OFF
ON
OFF