The POWER in Outdoor Power
Completely read and understand this manual PRIOR to using this product.
Lea y entienda este manual a fondo, ANTES de usar este producto.
Lisez complètement et comprenez ce manuel AVANT d'utiliser ce produit.
OWNER'S/OPERATOR'S MANUAL
MANUAL DEL PROPIETARIO U OPERADOR
MANUEL DU PROPRIETAIRE/DE
L'UTILISATEUR
String Trimmer
Recortadora
Coupe-bordures
BT23L
®
− US-1 −
Limited Warranty Statement
All Maruyama products are warranted to the original purchaser to be free from defects in materials and workman-
ship from the date of purchase
for the time periods listed as follows:
1year for industrial, commercial, institutional, residential and income producing use.
90 days for: rental use.
Engine, refer to engine manufacture's warranty statement. Maruyama engines are covered by this warran
-
ty statement.
Any
part of a Maruyama product found to be defective within the applicable warranty period shall, at Maruyama’s
option, be repaired or replaced without charge. Warranty consideration is obtained by delivering any Maruyama
product believed to be defective to an Authorized Maruyama Servicing Dealer within the applicable warranty period.
The purchaser shall not be charged for diagnostic labor that leads to the determination that a warranted part is
defective, if the diagnostic work is performed at a Maruyama Dealer.
Any warranted part which is not scheduled for replacement as required maintenance, or which is scheduled only
for regular inspection to the effect of “repair or replace as necessary” shall be warranted for the warranty period.
Any warranted part which is scheduled for replacement as required maintenance shall be warranted for the period
of time up to the first scheduled replacement point for that part. Maruyama Mfg. Co., Inc. is liable for damages to
other engine components caused by the failure of warranted part still under warranty.
The purchaser is responsible for the performance of the required maintenance, as defined by Maruyama Mfg.
Co., Inc. in the Owner’s/Operator’s Manual.
EMISSION-RELATED PARTS WARRANTY: In addition to the above warranty coverage, Maruyama Mfg. Co.,
Inc. will repair or replace, free of charge, for the original purchaser and each subsequent purchaser any emis
-
sion-related part or parts found to be defective in material and workmanship for two (2) years from origi- nal retail
delivery date.
Emission-related parts are the carburetor assembly, the ignition coil assembly, the ignition
rotor and the spark plug and the fuel tank. Any replacement part that is equivalent in perfor- mance and dura
-
bility may be used in non-warranty maintenance or repairs, and shall not reduce the warranty obligations of
Maruyama Mfg. Co., Inc.
This warranty does not cover the following:
1.
Maintenance items (excluding defects in materials and workmanship) including hoses, spark plugs, starter
rope, air and fuel filters, clutch shoes, vibration isolators, throttle cables and all cutting attach- ments.
2.
Extra expenses including shipping and handling, travel, payment for lost time or pay and for any inconve
-
nience and storage.
3.
Alterations or modifications including aftermarket parts not authorized by Maruyama.
4.
W
ear, accident, abuse, neglect, misuse, negligence, improper fuels, lubricants, fuel mixtures (when applica-
ble), or failure to operate or maintain the product in accordance with instructions approved by Maruyama.
Repair
or replacement as provided under this warranty is the exclusive remedy of the consumer. Maruyama shall
not be liable for any incidental or consequential damages for breach of any express or implied warranty on these
products except to the extent prohibited by applicable law. Any implied warranty of merchantability or fitness for a
particular purpose on these products is limited in duration to the warranty period as defined in the limited warranty
statement. Maruyama reserves the right to change or improve the design of the product without notice and does
not assume obligation to update previously manufactured products.
This warranty provides you with specific legal rights which may vary from state to state.
It is the Owner’s and Dealer’s responsibility to make sure the Warranty Registration Card is properly filled out and
mailed to Maruyama U.S., Inc. Proof of purchase and registration will be required in order to obtain war- ranty ser
-
vice.
T
o locate an Authorized Maruyama Servicing Dealer nearest you, contact Maruyama U.S., Inc. at 1-940-383-
7400.
Maruyama U.S., Inc.
4770 Mercantile Drive, suite100,
Fort Worth, TX 76137 U.S.A.
(940)383-7400
www.maruyama-us.com
®
− US-2 −
FEDERAL EMISSION CONTROL WARRANTY STATEMENT
YOUR WARRANTY RIGHTS AND OBLIGATIONS
The U.S. Environmental Protection Agency (EPA)
and Maruyama Manufacturing Company, Inc.
are pleased to explain the
emission control system warranty
on your small nonroad engine.
New 1997 and later model year small nonroad engines must be designed, built and equipped, at
the time of sale, to meet the U.S. EPA regulations for small nonroad engines. The equipment
engine must be free from defects in materials and workmanship which cause it to fail to conform
with U.S. EPA stan- dards for the first two years of engine use from the date of sale to the ultimate
purchaser. Maruyama Manufacturing Company, Inc. must warrant the emission control system on
your small nonroad engine for the period of time listed above provided there has been no abuse,
neglect or improper maintenance of your small nonroad engine.
Your emission control system may include parts such as the carburetor or fuel injection system, the
ignition system, and catalytic converter. Also included may be hoses, belts, and connectors and
other emission related assemblies.
Where a warrantable condition exists, Maruyama Manufacturing Company, Inc. will repair your
small nonroad engine at no cost to you, including diagnosis (if the diagnostic work is performed at
an authorized dealer), parts, and labor.
MANUFACTURER'S WARRANTY COVERAGE:
1997 and later model year small nonroad engines are warranted for two years. If any emission-
related part on your engine is defective, the part will be repaired or replaced by Maruyama
Manufacturing Company, Inc. free of charge.
OWNER'S WARRANTY RESPONSIBILITIES:
(a) As the small nonroad engine owner, you are responsible for the performance of the required
maintenance listed in your owner's/operator's manual.
Maruyama Manufacturing Company, Inc. recommends that you retain all receipts covering
maintenance on your small nonroad engine, but Maruyama Manufacturing Company, Inc.
cannot deny warranty solely for the lack of receipts or for your failure to ensure the perfor-
mance of all scheduled maintenance. Any replacement part or service that is equivalent in
performance and durability may be used in non-warranty maintenance or repairs, and shall
not reduce the warranty obligations of the engine manufacturer.
The engine exhaust from this product
contains chemicals known to the State
of California to cause cancer, birth
defects or other reproductive harm.
WARNING
:
.
.
BT23L
− US-3 −
(b) As the small nonroad engine owner, you should be aware, however, that Maruyama
Manufacturing Company may deny you warranty coverage if your small nonroad engine or
a part has failed due to abuse, neglect, improper maintenance or unapproved modifications.
(c) You are responsible for presenting your small nonroad engine to a Maruyama Manufacturing
Company, Inc. service center as soon as a problem exists. The warranty repairs should be
completed in a reasonable amount of time, not to exceed
30 days.
If you have any questions regarding your warranty rights and responsibilities, you should
contact Maruyama U.S., Inc. at
1-866-783-7400, or [email protected].
COVERAGE
Maruyama Manufacturing Company, Inc. warrants to the ultimate purchaser and each subse-
quent purchaser that your small nonroad engine will be designed, built and equipped, at the
time of sale, to meet all applicable regulations. Maruyama Manufacturing Company, Inc. also
warrants to the initial purchaser and each subsequent purchaser that your small nonroad
engine is free from defects in materials and workmanship which cause the engine to fail to
conform with applic- able regulations for a period of two years.
1997 and later model years, EPA requires manufacturers to small nonroad engines for two
years. These warranty periods will begin on the date the small nonroad engine is purchased by
the ini- tial purchaser. If any emission-related part on your engine is defective, the part will be
replaced by Maruyama Manufacturing Company, Inc. at no cost to the owner.
Maruyama Manufacturing Company, Inc. shall remedy warranty defects at any authorized
Maruyama Manufacturing Company, Inc. engine dealer or warranty station. Any authorized
work done at an authorized dealer or warranty station shall be free of charge to the owner if
such work determines that a warranted part is defective. Any manufacturer-approved or
equivalent replace- ment part may be used for any warranty maintenance or repairs on
emission-related parts, and must be provided free of charge to the owner if the part is still under
warranty, Maruyama Manufacturing Company, Inc. is liable for damages to other engine
components caused by the failure of a warranted part still under warranty.
EPA‘s regulations do not include a parts list, but EPA considers emission-related warranted
parts to include all the parts listed below. These warranted parts are: the carburetor assembly,
the ignition coil assembly, the ignition rotor, the spark plug and the fuel tank.
MAINTENANCE REQUIREMENTS
The owner is responsible for the performance of the required maintenance as defined by the
Maruyama Manufacturing Company, Inc. in the owner's/operator's manual.
LIMITATIONS
This Emission Control System Warranty shall not cover any of the following:
(a) repair or replacement required because of misuse or neglect, lack of required maintenance,
repairs improperly performed or replacements not conforming to Maruyama Manufacturing
Company, Inc. specifications that adversely affect performance and/or durability, and alter-
ations or modifications not recommended or approved in writing by Maruyama
Manufacturing Company, Inc., and
(b) replacement of parts and other services and adjustments necessary for required mainte-
nance at and after the first scheduled replacement point.
− US-4 −
CALIFORNIA EMISSION CONTROL WARRANTY STATEMENT
YOUR WARRANTY RIGHTS AND OBLIGATIONS
The California Air Resources Board (CARB), and Maruyama Manufacturing Company, Inc. are
pleased to explain the emission control system warranty on your 2013 small off-road engine. In
California, new small off-road engines must be designed, built and equipped to meet the State's
stringent anti-smog standards. Maruyama Manufacturing Company, Inc. must warrant the emission
control system on your small off-road engine for the period of time listed above provided there has
been no abuse, neglect or improper maintenance of your small off-road engine.
Your emission control system may include parts such as the carburetor or fuel injection system, the
ignition system, fuel tank and catalytic converter. Also included may be hoses, belts, and connec
-tors andother emission related assemblies.
Where a warrantable condition exists, Maruyama Manufacturing Company, Inc. will repair your
small off-road engine at no cost to you, including diagnosis, parts, and labor.
MANUFACTURER'S WARRANTY COVERAGE:
The 1995 and later small off-road engines are warranted for two years. If any emission-related part
on your engine is defective, the part will be repaired or replaced by Maruyama Manufacturing
Company, Inc.
OWNER'S WARRANTY RESPONSIBILITIES:
(a) As the small off-road engine owner, you are responsible for the performance of the required
maintenance listed in your owner's/operator's manual.
Maruyama Manufacturing Company, Inc. recommends that you retain all receipts covering
maintenance on your small off-road engine, but Maruyama Manufacturing Company, Inc.
cannot deny warranty solely for the lack of receipts or for your failure to ensure the perfor-
mance of all scheduled maintenance
(b) As the small off-road engine owner, you should be aware, however, that Maruyama
Manufacturing Company may deny you warranty coverage if your small off-road engine or a
part has failed due to abuse, neglect, improper maintenance or unapproved modifications.
(c) You are responsible for presenting your small off-road engine to a Maruyama Manufacturing
Company, Inc. distribution center as soon as a problem exists. The warranty repairs should
be completed in a reasonable amount of time, not to exceed 30 days.
If you have any questions regarding your warranty rights and responsibilities, you should
contact Maruyama U.S., Inc. at
1-866-783-7400, or [email protected].
Emission System Parts
Exhaust Emission
Carburetor
Muffler
Catalytic Converter
Ignition Coil / Magneto
Spark Plug
Air Filter
EGR Valve (piston)
Fuel Filter
Evaporative Emission
Fuel Tank
− US-5 −
Contents
Page US-
Limited Warranty Statement .........................................1
Federal Emission Control .............................................2
California Emission Control .........................................4
Contents ........................................................................5
Introduction ...................................................................5
Safety ............................................................................ 6
Operator Safety ........................................................6
Trimmer Safety ........................................................6
Fuel Safety ..............................................................7
Trimmer Operating Safety .......................................7
Safety and Instruction Decals ....................................... 8
Product Description ......................................................8
Assembly .....................................................................9
Loop Handle Installation ......................................... 9
Installing Debris Shield ........................................... 9
Installing Trimmer Head ........................................10
Before Operation ........................................................10
Oil and Fuel ...........................................................10
Mixing Gasoline And Oil ......................................11
Starting And Stopping ...........................................12
Operation ....................................................................13
Operating Position ................................................. 14
Cutting with Trimmer Head ...................................14
Maintenance ................................................................15
Idle Speed Adjustment ...........................................15
Air Filter ................................................................16
Fuel Filter ..............................................................16
Spark Plug ..............................................................17
Cylinder Cooling Fins ...........................................17
Spark Arrester ........................................................ 17
Exhaust Muffler .....................................................18
Gearcase .................................................................18
General Cleaning and Tightening ..........................19
Storage ........................................................................ 19
Troubleshooting .......................................................... 20
Specifications .............................................................20
Maintenance Period ....................................................20
Introduction
Thank you for purchasing a Maruyama product.
Maruyama, it’s distributors, and dealers want you to be
completely satisfied with your new product. Please feel
free to contact your local Authorized Service Dealer for
help with service, genuine Maruyama parts, or other
information you may require.
Whenever you contact your Authorized Service Dealer
or the factory, always know the serial number of your
product. This number will help the Service Dealer or
Service Representative provide exact information about
your specific product. You will find the model and
serial number located in a unique place on the product
(Product Description on page US-8).
For your convenience, write the product model name
and serial number in the space below.
Model Name
Serial No.
Read this manual carefully to learn how to operate and
maintain your product correctly. Reading this manual
will help you and others avoid personal injury and
damage to the product.
Although Maruyama designs, produces and markets
safe, state-of-the-art products, you are responsible for
using the product properly and safely. (You are also
responsible for training persons who you allow to use
the product for safe operation.)
The MARUYAMA warning system in this manual
identifies potential hazards and has special safety
messages that help you and others avoid personal
injury, even death.
− US-6 −
DANGER, WARNlNG and CAUTION are signal
words used to identify the level of hazard. However,
regardless of the hazard, be extremely careful.
DANGER signals an extreme hazard that will cause
serious injury or death if the recommended precautions
are not followed.
WARNING signals a hazard that may cause serious
injury or death if the recommended precautions are not
followed.
CAUTION signals a hazard that may cause minor or
moderate injury if the recommended precautions are
not followed. Two other words are also used to
high¬light information. “Important” calls attention to
special mechanical information and “Note” emphasizes
general information worthy of special attention.
Safety
Operator Safety
1. Read and understand this Owner's/Operator's
before using this product. Be thoroughly familiar
with the proper use of this product.
2. Never allow children to operate the Trimmer. It is
not a toy. Never allow adults to operate the unit
without first reading the Owner's/Operator's
Manual.
3. Always wear eye protection that complies with
ANSI (American National Standards Institute)
Z87-1.
4. Always wear hearing protection.
5. Always wear heavy, long pants, a long sleeved
shirt, boots and gloves. Do not wear loose
clothing, jewelry, short pants, sandals, or go
barefoot. Secure hair so it is above shoulder
length.
6. Never operate this Trimmer when you are tired,
ill, or under the influence of alcohol, drugs or
medication.
7. Never start or run the engine inside a closed room
or building. Breathing exhaust fumes can cause
death.
8. Keep handles clean of oil, fuel and dirt.
Trimmer Safety
1. Make sure the Trimmer is assembled correctly and
that the tool attachment is correctly installed and
securely fastened as instructed in the Assembly
section.
2. Inspect the Trimmer before each use. Replace
damaged parts. Check for fuel leaks. Make sure
all fasteners are in place and tightened securely.
Follow the maintenance instructions beginning on
page US-15.
3. Make sure the cutting head does not rotate at
engine idle speed. Refer to Idle Speed
Adjustment, page US-15.
4. Inspect the cutting head and replace any parts that
are cracked, chipped or damaged before using the
Trimmer.
5. Make sure the shields is installed and positioned
correctly before using the Trimmer.
6 Never use a cutting head or replacement parts that
are not approved by MARUYAMA.
7. Maintain the Trimmer according to the
recommended maintenance intervals and
procedures in the Maintenance section on page
US-15.
8. Shut off the engine and be certain the cutting head
− US-7 −
has completely stopped rotating before checking,
inverting the Trimmer, performing maintenance
on or working on the Trimmer.
9. If running problems or excessive vibration occur,
stop immediately and inspect the unit for the
cause.
If the cause cannot be determined or is beyond
your ability to correct, return the Trimmer with
tool attachment to your servicing dealer for repair.
Fuel Safety
1. Gasoline is highly flammable and must be handled
and stored carefully. Use a container approved for
fuel to store gasoline and/or fuel/oil mixture.
2. Mix and pour fuel outdoors, where there are no
sparks or flames.
3. Do not smoke near fuel or Trimmer, or while
using the Trimmer.
4. Do not overfill the fuel tank. Stop filling 1/4-1/2
inch (6 mm-13 mm) from the top of the tank.
5. Wipe up any spilled fuel before starting the
engine.
6. Move the Trimmer at least 10 feet (3 m) away
from the fueling location before starting the
engine.
7. Do not remove the fuel tank cap while the engine
is running, or right after stopping the engine.
8. Allow the engine to cool before refueling.
9. Drain the tank and run the engine dry before
storing the unit.
10. Store fuel and Trimmer away from open flame,
sparks and excessive heat. Make sure fuel vapors
cannot reach sparks or open flames from water
heaters, furnaces, electric motors, etc.
Trimmer Operating Safety
1. THIS TRIMMER CANCAUSE SERIOUS
INJURIES. Read the instructions carefully. Be
familiar with all controls and the proper use of the
Trimmer.
2. Makesuretheφ3.5mmpinhasbeenremoved
from the gearcase and boss adapter before you
start the engine.
3. Avoid using the trimmer near rocks, gravel, stones
and similar material which can become dangerous
projectiles.
4. Inspect your work area before you begin. Remove
objects such as broken glass, nails, wire and rocks
which can become dangerous projectiles if thrown
by the Trimmer. Remove string, rope or similar
materials which can become entangled in the
cutting head.
5. Keep children, bystanders and animals outside a
50 ft. (15 m) radius from the operator and
Trimmer.
6. If you are approached while operating the
Trimmer, stop the engine and cutting head
rotation.
7. Never allow children to operate the Trimmer.
10 feet (3 m) Minimum
− US-8 −
8. Use the Trimmer only in daylight or good artificial
light.
9. Never operate the Trimmer without proper guards
or other protective safety devices in place.
10. Always keep the Trimmer on the right side of your
body.
11. Do not raise the cutting head above waist level.
12. Do not put hands or feet near or under any rotating
parts. Keep clear at all times. Keep all parts of
your body away from the rotating cutting
attachment and hot surfaces such as the muffler.
13. Keep firm footing and balance. Do not overreach.
14. Use the right tool for the job. Do not use the
Trimmer for any job that is not recommended by
Safety and Instruction Decals
Safety decals and instructions are easily visible to the operator and are located near any area of
potential danger. Replace any decal that is damaged or lost
Product description
BT23L
7. Clutch Drum Housing
8. Engine
9. Serial Number (on rear of engine)
10. Air Filter
11. Fuel Tank
12. Throttle Cable and Stop Switch
Wires
13. Debris Shield
14. Trimmer Head
ON SHAFT (Part No.221501)
ON SHAFT (Part No.221502)
1. Gearcase
2. Shaft Assembly
3. Model Name
4. Safety Decal
5. Loop Handle
6. Throttle Trigger and Stop Switch
]
9
− US-9 −
Loop Handle
Screw (4)
Bottom Clamp
Nut (4)
Assembly
Loop Handle Installation
1. Place the loop handle and the bottom clamp on the
shaft approximately 28cm(11 inches) from the end
of the stop switch/throttle trigger assembly.
2. Install the four screws and nuts. Leave the screws
fingertight.
3. Reposition the loop handle up or down the
driveshaft to the most comfortable position, but
no closer than 9 inches (22.8 cm) from the end of
the stop switch.
4. Tighten the screws and nuts.
Installing Debris Shield
WARNING
POTENTIAL HAZARD
•
Foreign objects can be thrown by String
Trimmer. WHAT CAN HAPPEN
•
Contact with thrown objects can cause
personal injury. HOW TO AVOID THE
HAZARD
•
Never operate the String Trimmer without
the trimmer head shield in place.
CAUTION
POTENTIAL HAZARD
•
The String cutoff blade is sharp. WHAT
CAN HAPPEN
•
Contact with cutoff blade can cause serious
cuts or personal injury. HOW TO AVOID
THE HAZARD
•
Keep hands, feet and clothing away from
cutoff blade.
1. Fasten the string cutoff blade to the trimmer head
shield with two M5 x 12 screws and hex nuts.
2. Attach the trimmer head shield to the gearcase
with the two M5 x 30 screws and plate as shown.
Loop Handle
Screw (4)
Bottom Clamp
Nut (4)
Loop Handle
Screw (4)
Bottom Clamp
Nut (4)
− US-10 −
Installing Trimmer Head
WARNING
POTENTIAL HAZARD
•
If the Trimmer Head is not adequately
tightened, it can come loose from the String
Trimmer during use.
WHAT CAN HAPPEN
•
This may cause damage to property or
personal injury.
HOW TO AVOID THE HAZARD
•
Make sure the trimmer head is securely
fastened to the attaching shaft in the
gearcase.
IMPORTANT: The boss adapter must be, installed
on the attaching shaft between the gearcase and the
trimmer head as shown. And attaching shaft is left-
head threaded.
1. Install the boss adapter onto the attaching shaft
out of the gearcase.
2. Align the hole in the boss adapter with the hole in
the gearcase.
3. Insert the 3.5 mm pin into the holes in the boss
adapter and gearcase to lock the attaching shaft.
4. Thread the attaching shaft into the trimmer head
adapter, then tighten the trimmer head firmly by
hand.
5. Remove the 3.5mm pin from the boss adapter and
gearcase.
Before Operation
Oil and Fuel
DANGER
POTENTIAL HAZARD
•
In certain conditions gasoline is extremely
flammable and highly explosive.
WHAT CAN HAPPEN
•
A fire or explosion from gasoline can burn
you, others and cause property damage.
HOW TO AVOID THE HAZARD
•
Use a funnel and fill the fuel tank outdoors,
in an open area, when the engine is cold.
Wipe up any gasoline that spills.
•
Do not fill the fuel tank completely full. Add
gasoline to the fuel tank until the level is 1/4”
to 1/2” ( 6 mm to 13mm ) below the bottom
of the filler neck. This empty space in the
tank allows gasoline to expand.
•
Never smoke when handling gasoline, and
stay away from an open flame or where
gasoline fume may be ignited by a spark.
•
Store gasoline in an approved container and
keep it out of the reach of children.
•
Never buy more than a 30-day supply of
gasoline.
1. Do not smoke near fuel.
2. Mix and pour fuel outdoors and where there are
no sparks or flames.
WARNING
POTENTIAL HAZARD
•
Gasoline contains gasses that can build up
pressure inside a gas tank.
WHAT CAN HAPPEN
•
Fuel can be sprayed on you when removing
gas cap.
HOW TO AVOID THE HAZARD
•
Remove fuel cap slowly to avoid injury from
fuel spray.
− US-11 −
3. Always shut off the engine before refueling.
Never remove the fuel tank cap while the engine
is running or right after just stopping the engine.
4. Always open the fuel tank cap slowly to release
any possible overpressure inside the tank.
5. Do not overfill the fuel tank. Stop filling 1/4-1/2
inch (6 mm-13 mm) from the top of the tank.
6. Tighten the tank fuel cap carefully but firmly after
refilling.
7. Wipe up any spilled fuel before starting the
engine.
8. Move the unit at least 10 feet (3 m) away from the
fueling location and fuel storage container before
starting the engine.
Recommended Oil Type
Only use a two-cycle engine oil formulated for use in
high performance, air cooled two cycle engines.
MARUYAMA brand 2-cycle oil is formulated for use
in high performance, air cooled two-cycle engines.
IMPORTANT: Do not use National Marine
Manufacturer’s Association (NMMA) or BIA
certified oils. This type of 2-cycle engine oil does
not have the proper additives for air cooled,
2-cycle engines and can cause engine damage.
Do not use automotive motor oil. This type of oil
does not have the proper additives for air cooled,
2-cycle engines and can cause engine damage.
Recommended Fuel Type
Use clean, fresh lead-free gasoline, including
oxygenated or reformulated gasoline, with an octane
rating of 85 or higher. To ensure freshness, purchase
only the quantity of gasoline that can be used in 30
days. Use of lead-free gasoline results in fewer
combustion chamber deposits and longer spark plug
life. Use of premium grade fuel is not necessary or
recommended.
Use Of Fuel Additives
IMPORTANT: NEVER USE ALCOHOL,
GASOHOL CONTAINING MORE THAN 10%
ALCOHOL BECAUSE ENGINE FUEL
SYSTEM DAMAGE COULD RESULT.
DO NOT USE FUEL ADDITIVES OTHER
THAN THOSE MANUFACTURED FOR FUEL
STABILIZATION DURING STORAGE SUCH
AS MARUYAMA’S STABILIZER/ CONDITIO-
NER OR A SIMILAR PRODUCT.
MARUYAMA’S STABILIZER/CONDITIONER
IS A PETROLEUM DISTILLATE BASED
CONDITIONER/STABILIZER. MARUYAMA
DOES NOT RECOMMEND STABILIZERS
WITH AN ALCOHOL BASE SUCH AS ETHA-
NOL, METHANOL OR ISOPROPYL.
ADDITIVES SHOULD NOT BE USED TO TRY
TO ENHANCE THE POWER OR PERFOR-
MANCE OF MACHINE.
Mixing Gasoline And Oil
IMPORTANT: The engine used on this Trimmer
is of a 2-cycle design. The internal moving parts
of the engine, i.e., crankshaft bearings, piston pin
bearings and piston to cylinder wall contact
surfaces, require oil mixed with the gasoline for
lubrication.
Failure to add oil to the gasoline or failure to mix
oil with the gasoline at the appropriate ratio will
cause major engine damage which will void your
warranty.
For your fuel premix, use Maruyama Premium 2-
cycle Oil Mix, or equivalent ISO-L-EGD & JASO
FD oil with a minimum 89 octane high Quality
gasoline. Maruyama 2-cycle oil is specially
formulated to meet the requirements of high-
performance, low-emission air-cooled 2-cycle
engines. Use of other oils may lead to service
issues which may Not be covered by your
warranty.
− US-12 −
Fuel Mixture
The fuel: oil ratio is 50 parts gasoline to 1 part oil or
50:1.
Note: Never use a mixing ratio less than 50:1
regardless of the oil package mixing
instructions. Ratios less than 50:1, (for
example, 60:1, 80:1, 100:1), reduce the
amount of lubrication to the internal moving
parts of the engine and can cause damage.
Fuel Mixture Chart
Gasolin 50:1 2-cycle oil
1gallon 2.6oz.
2gallon 5.1oz.
5gallon 12.8oz.
1liter 20ml
5liter 100ml
Mixing Instructions
IMPORTANT: Never mix gasoline and oil
directly in the Trimmer fuel tank.
1. Always mix fuel and oil in a clean container
approved for gasoline.
2. Mark the container to identify it as fuel mix for
the Trimmer.
3. Use regular unleaded gasoline and fill the
container with half the required amount of
gasoline.
4. Pour the correct amount of oil into the container
then add the remaining amount of gasoline.
5. Close the container tightly and shake it
momentarily to evenly mix the oil and the
gasoline before filling the fuel tank on the
Trimmer.
6 When refilling the Trimmer fuel tank, clean
around the fuel tank cap to prevent dirt and debris
from entering the tank during cap removal.
7 Always shake the premix fuel container momen-
tarily before filling the fuel tank.
8 Always use a spout or funnel when fueling to
reduce fuel spillage.
9 Fill the tank only to within 1/4-1/2 inch (6 mm-13
mm) from the top of the tank. Avoid filling to the
top of the tank filler neck.
Starting And Stopping
Before Starting The Engine
1. Fill the fuel tank as instructed in the Before
Operation section of this manual (page US-10).
2. Rest the Trimmer on the ground.
3. Make sure the cutting attachment is clear of any
broken glass, nails, wire, rocks or other debris.
4. Keep all bystanders, children and animals away
from the working area.
Cold Starting Procedure
This Trimmer is equipped with a fuel primer and a
choke system. To start a “cold” engine properly,
perform the following procedure:
1. Pump the primer bulb at the bottom of the carbu-
retor until fuel can be seen flowing through the
fuel return line to the fuel tank. (Flowing fuel
should be almost clear, not foamy or full of
bubbles.)
2. Move the choke lever to the closed (
) position
and move the stop switch to the “ON” position.
50:1
− US-13 −
3. Lock the throttle trigger in the fast-idle start
position, then pull the starter grip.
CAUTION
•
Do not pull the Starter rope all the way out.
WARNING
• Do not disassemble the Starter.
Please ask for an authorized MARUYAMA
service dealer.
After the engine starts, squeeze and release the throttle
trigger to return it to the idle position, then move the
choke lever to the open (
) position.
If the engine stops running before you move the choke
lever to the open (
) position:
Go ahead and open the choke, pull the starter grip with
the throttle tigger positioned at Fast-idle position.
Hot Restart
To start an engine that is already warmed up (hot
restart), or if the ambient temperature exceeds 68°F
(20°C):
1. Pump the primer bulb at the bottom of the car-
buretor until fuel can be seen flowing through the
fuel return line to the fuel tank.
2. Move the choke lever to the open (
) position
and move the stop switch to the “ON” position.
3. Leave the throttle trigger in the idle position and
pull the starter grip.
4. If the engine fails to start after three to four pulls,
follow the instruction in the Cold Starting
Procedure section (this page).
If the engine fails to start after you follow the
above procedures, contact an authorized
MARUYAMA dealer.
To Stop The Engine:
1. Release the throttle trigger.
2. Slide the stop switch to the “STOP” position.
Operation
WARNING
POTENTIAL HAZARD
•
Foreign objects can be thrown by String
Trimmer.
WHAT CAN HAPPEN
•
Contact with thrown objects can cause
personal injury.
HOW TO AVOID THE HAZARD
•
Never operate the String Trimmer without
the guard.
− US-14 −
CAUTION
•
Read the Safety instructions on page US-6
concerning proper use of the String Trimmer.
Operating Position
Before using the Trimmer, check the following:
1. Make sure the Holding Tool (3.5mm Pin) has been
removed from the gearcase and boss adapter
before you start the engine.
2. The Trimmer must be on the operator’s right side.
3. The operator’s right hand should be holding the
shaft grip, with his or her fingers on the throttle
trigger. The right arm should be slightly bent.
4. The left hand should be holding the loop handle
with the fingers and thumb fully enclosed around
the grip. The left arm may be extended.
Reposition the loop handle up or down the
driveshaft if necessary for a comfortable position.
5. The trimmer weight should be evenly distributed
between the arms. The cutting attachment should
be near and parallel to the ground.
6. Accelerate and hold the engine at cutting speed
before entering the material to be cut.
7. Always release the throttle trigger and allow the
engine to return to idle speed when not cutting.
8. Stop the engine when moving between work sites.
CAUTION
•
Always wear gloves and protective clothing
when operating the String Trimmer.
•
If the trimmer head becomes jammed, stop the
engine immediately.
•
Make certain all moving parts have stopped and
disconnect the spark plug before inspecting the
•
Never use a String Trimmer that has chipped,
cracked or broken trimmer head.
Cutting with Trimmer Head
•
The tip of the line does the cutting. The line should
stay extended while cutting.
•
Do not force the line into the material. Forcing the
line will cause it to slap against the material,
increasing line usage and causing poor cutting
results.
Three inchs (7,6cm)
above Ground
CORRECT
INCORRECT
Three inchs (7,6cm)
above Ground
CORRECT
INCORRECT
Three inchs (7,6cm)
above Ground
CORRECT
INCORRECT
− US-15 −
Trimming
Hold the bottom of the trimmer head about 3 in. (7.6
cm) above the ground and at an angle. Allow only the
tip of the line to make contact.
Scaling
To remove unwanted vegetation, hold the trimmer head
about 3 in. (7.6 cm) above the ground and at an angle.
Allow the tip of the line to strike the ground cutting the
vegetation off at the surface.
Mowing
Keep the line parallel to the ground and use a gentle
side to side motion.
Maintenance
Maintenance, replacement or repair of emission control
devices and systems may be performed by any repair
establishment or individual; however, warranty repairs
must be performed by a dealer or service center
authorized by Maruyama Manufacturing Company,
Inc. The use of parts that are not equivalent in
performance and durability to authorized parts may
impair the effectiveness of the emission control system
and may have a bearing on the outcome of a warranty
claim.
Idle Speed Adjustment
This Trimmer is equipped with nonadjustable fuel
mixture carburetor. The engine idle speed is the only
adjustment for the operator.
WARNING
POTENTIAL HAZARD
•
Engine must be running to make carburetor
adjustments.
•
When engine is running, cutting head is
rotating and other parts are moving.
WHAT CAN HAPPEN
•
Contact with rotating cutting head or other
moving parts could cause serious personal
injury or death.
HOW TO AVOID THE HAZARD
•
Keep hands, feet and clothing away from
attached tool and other moving parts.
•
Keep all bystanders and pets away from unit
while making carburetor adjustments.
The cutting head may be rotating/moving during idle
speed adjustment. Wear the recommended personal
protective equipment and observe all safety
instructions. Keep hands and body away from the
cutting head.
When the throttle trigger is released, the engine should
return to an idle speed between 2700 and 3300 RPM,
or just below the clutch engagement speed. The
Attached Tool must not rotate/move and the engine
should not stall (stop running) at engine idle speed.
To adjust the engine idle speed, rotate the idle speed
Three inchs (7,6cm)
above Ground
Three inchs (7,6cm)
above Ground
Three inchs (7,6cm)
above Ground
Three inchs (7,6cm)
above Ground
Three inchs (7,6cm)
above Ground
Three inchs (7,6cm)
above Ground
− US-16 −
adjustment screw on the carburetor.
•
Turn the idle speed screw in (clockwise) to increase
the engine idle speed.
•
Turn the screw out (counterclockwise) to decrease
the engine idle speed.
If idle speed adjustment is necessary, and after
adjustment the cutting head rotates or the engine
stalls, stop using the Trimmer immediately!
Contact your local authorized MARUYAMA Dealer for
assistance and servicing.
Air Filter
Maintenance Interval
•
The air filter should be cleaned daily, or more often
when working in extremely dusty conditions.
•
Replace after every 100 hours of operation.
Air Filter Cleaning
1. Loosen the knob and remove the air filter cover.
2. Remove the foam element and filter screen from
the air filter body.
3. Clean the foam element and filter screen with
warm, soapy water. Let the screen and element
dry completely.
4. Apply a light coat of SAE 30 motor oil to the
foam element and squeeze out all excess oil.
5. Reassemble the filter screen, foam element and to
the air filter cover.
Fuel Filter
Maintenance Interval
The fuel filter should be replaced after every 100 hours
of operation.
Fuel Filter Replacement
The fuel filter is attached to the end of the fuel pick-up
hose inside the fuel tank.
1. Make sure the fuel tank is empty.
2. Remove the fuel cap.
3. Using a wire hook, gently pull the fuel filter out
through the fuel filler opening.
4. Grasp the fuel hose next to the fuel filter fitting
and remove the filter, but do not release the hose.
5. While still holding on to the fuel hose, attach the
new fuel filter.
6. Drop the new fuel filter back into the fuel tank.
7. Make sure that the fuel filter is not stuck in a
corner of the tank, and that the fuel hose is not
doubled over (kinked) before refueling.
− US-17 −
Spark Plug
Maintenance Interval
•
The spark plug should be removed from the engine
and checked after each 25 hours of operation.
•
Replace the spark plug after every 100 hours of
operation.
Spark Plug Maintenance
1. Twist the high tension lead boot on the spark plug
back and forth a couple of times to loosen the
boot, then pull the boot off of the spark plug.
2. Remove the spark plug.
3. Clean the electrodes with a stiff brush.
4. Adjust the electrode air gap to .024-.028 in (0.6-
0.7 mm).
5. Replace the spark plug if it is oil-fouled, damaged,
or if the electrodes are worn down.
6. Do not overtighten the spark plug when installing.
The tightening torque is 95-148 in. lbs. (10.7-16.6
N·m).
7. Always use only the specific heat range of spark
plug. This is particularly critical with today's
lowemission engines. For best results, use the
exact replacement.
Cylinder Cooling Fins
Maintenance Interval
The cylinder cooling fins should be cleaned after every
25 hours of operation, or once a week, whichever
comes first. Air must flow freely around and through
the cylinder cooling fins to prevent engine overheating.
Leaves, grass, dirt and debris buildup on the fins will
increase the operating temperature of the engine, which
can reduce engine performance and shorten engine life.
Cooling Fin Cleaning
1. With the engine at ambient (room) temperature,
loosen the knob and remove the air filter cover.
2. Twist the high tension lead boot on the spark plug
back and forth a couple of times to loosen the
boot, then pull the boot off of the spark plug.
3. Loosen the knob and lift off the cylinder cover.
4. Clean all dirt and debris from the cooling fins and
from around the cylinder base.
5. Reinstall the fan cover and the filter cover.
Spark Arrester
WARNING
POTENTIAL HAZARD
•
Muffler surface becomes hot whenTrimmer
in operation and remains hot for some time
after the engine is shut off.
WHAT CAN HAPPEN
•
Contact with hot muffler surfaces could
cause a burn.
HOW TO AVOID THE HAZARD
•
Make sure the muffler is cool before
inspecting and cleaning the spark arrester.
Air Filter Cover
Cylinder Cover
High Tension
Lead Boot
Knob
Cooling
Fins
Knob
− US-18 −
Maintenance Interval
•
The spark arrester should be inspected and cleaned
after every 25 hours of use.
•
Replace the screen if it cannot be thoroughly
cleaned, or if it is damaged.
Spark Arrester Maintenance
1. With the engine at ambient (room) temperature,
loosen the knob and remove the air filter cover.
2. Twist the high tension lead boot on the spark plug
back and forth a couple of times to loosen the
boot, then pull the boot off of the spark plug.
3. Loosen the knob and lift off the cylinder cover.
4. Remove and clean the tail, gasket and spark
arrester with a safety solvent and a stiff brush. If
any part cannot be thoroughly cleaned, it must be
replaced.
5. Reinstall the spark arrester and tail onto the
muffler, then reinstall and tighten the two socket
headscrews.
6. Reinstall the cylinder cover and the air filter
cover.
Exhaust Muffler
Maintenance Interval
The muffler should be inspected and cleaned after each
100 hours of use.
Muffler Maintenance
1. With the engine at ambient (room) temperature,
loosen the knob and remove the air cleaner cover.
2. Twist the high tension lead boot on the spark plug
back and forth a couple of times to loosen the
boot, then pull the boot off of the spark plug.
3. Loosen the knob and lift off the cylinder cover.
4. Remove the spark arrester (see spark arrester
maintenance), Clean the muffler with a stiff brush.
IMPORTANT: Don’t use solvent for cleaning inside
of muffler, because of the catalytic converter in
muffler.
Be careful not to allow any dirt or debris to fall into
the exhaust port, as this can cause engine damage.
5. Reinstall the spark arrester and tail onto muffler,
then reinstall and tighten the two socket head
screws.
6. Reinstall the cylinder cover and the air filter
cover.
Gearcase
Maintenance Interval
The gearcase should be checked for lubrication after
each 30 hours of use.
Gearcase Lubrication
Remove the cutting attachment and the boss adapter.
Clean any dirt and debris from the area between the
boss adapter and the gearcase. Remove the grease plug
from the side of the gearcase. While rotating the attach-
ing shaft, inject lithium-base bearing lube (P/N
211337) through the plug hole until the gearcase is full.
Reinstall the boss adapter and grease plug.
− US-19 −
General Cleaning and Tightening
The Trimmer will provide maximum performance for
many, many hours if it is maintained properly.
WARNING
POTENTIAL HAZARD
•
When engine is running, Attached Tool is
rotating/ moving and other parts are moving.
WHAT CAN HAPPEN
•
Contact with rotating/moving Tool or other
moving parts could cause serious personal
injury or death.
HOW TO AVOID THE HAZARD
•
Always turn off your Trimmer before you
clean or perform any maintenance on it.
Good maintenance includes regular checking of all
fasteners for correct tightness and cleaning the entire
machine.
Storage
For long term storage of the Trimmer:
1. Empty the fuel tank into a suitable fuel storage
container.
2. Pump the primer bulb on the carburetor until all
fuel is discharged through the clear fuel return
hose.
3. Run the engine to remove any fuel that may
remain in the carburetor.
4. Perform all regular maintenance procedures and
any needed repairs.
5. Remove the spark plug and squirt a very small
amount of oil into the cylinder.
CAUTIONN
POTENTIAL HAZARD
•
Oil may squirt out of the spark plug opening
when you pull the starter grip.
WHAT CAN HAPPEN
•
Oil can cause eye injuries.
HOW TO AVOID THE HAZARD
•
Protect your eyes and keep your face away
from the spark plug opening.
6. Pull the starter grip once.
7. Slowly pull the starter grip to bring the piston to
the top of the cylinder (TDC).
8. Reinstall the spark plug.
9. Store the Trimmer in a dry place away from
excessive heat, sparks or open flame.
Bearing Lube
(P/N 211337)
Grease Plug
Plug Hole
Gearcase
Attaching Shaf
t
Boss Adapter
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Maruyama B23C Le manuel du propriétaire
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- Le manuel du propriétaire
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dans d''autres langues
- English: Maruyama B23C Owner's manual
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