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Limited Warranty Statement

All Maruyama products are warranted to the original purchaser to be free from defects in material and work-
manship from the date of purchase for the time periods listed as follows:

Lifetime for inner drive shafts on trimmers and brushcutters and all ignition modules.  2 years for resi-
dential, non-institutional, non-income producing use.  1 year for industrial, commercial, institutional and
income producing use. 6 months for rental use.  Engine, refer to engine manufacturer‘s warranty
statement.  Maruyama engines are covered by this limited warranty 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 deliver-
ing 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
emission-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. 
Any replacement part that is equivalent in performance and durabili-
ty 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, etc.

2. Extra expenses including shipping and handling, travel, payment for lost time or pay and for any

inconvenience and storage.

3. Alterations or modifications including aftermarket parts not authorized by Maruyama U.S., Inc.
4. Wear, accident, abuse, neglect, misuse, negligence, improper fuels, lubricants, fuel mixtures (when

applicable), 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 service.
To locate an Authorized Maruyama Servicing Dealer nearest you, contact Maruyama U.S., Inc. at 1-253-735-7368.

Effective March 1, 1997

Maruyama U.S., Inc.

P.O. Box 309

Auburn, WA 98071-0309

(253) 735-7368

[email protected]

www.maruyama-us.com

Summary of Contents for BST23

Page 1: ...String Trimmer BST23 BST23C...

Page 2: ...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 Any replacement part...

Page 3: ...ater 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 f...

Page 4: ...rmines 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 f...

Page 5: ...es 11 Connecting Throttle Cable 11 Installing Trimmer Head Shield 12 Installing Trimmer Head 13 Attaching Strap 14 Before Operation 14 Oil and Fuel 14 Mixing Gasoline And Oil 15 Page Starting And Stop...

Page 6: ...mation about your specific product You will find the model and seri al number located in a unique place on the product Product Description on page 9 For your convenience write the product model name a...

Page 7: ...toy Never allow adults to operate the unit without first reading the Operator s Manual 3 Always wear eye protection that complies with ANSI American National Standards Institute Z87 1 4 Always wear h...

Page 8: ...il mixture 2 Mix and pour fuel outdoors and 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...

Page 9: ...hildren to operate the Trimmer 7 Use the Trimmer only in daylight or good artifi cial light 8 Never operate the Trimmer without proper guards or other protective safety devices in place 9 Always keep...

Page 10: ...iption BST23 1 2 3 4 5 6 7 8 9 10 12 11 13 15 16 1 Gearcase 2 Shaft Assembly 3 Model Name 4 Loop handle 5 Attachment Ring for Shoulder Harness 6 Throttle Trigger and Stop Switch 7 Shaft Grip 8 Clutch...

Page 11: ...ft approxi mately 9 inches 22 8 cm from the end of the stop switch throttle trigger assembly for an initial han dle position 2 Rotate the rubber sleeve so the split is to one side 3 Place the loop han...

Page 12: ...ssed hole for the cable lug is away from the cable adjuster sleeve 3 Rotate the carburetor throttle cam clockwise and slip the throttle cable through the slot in the slot ted fitting making sure the c...

Page 13: ...n ONLY AS NEEDED CAUTION POTENTIAL HAZARD The cutoff blade is sharp WHAT CAN HAPPEN Contact with cutoff blade could cause serious cuts or personal injury HOW TO AVOID THE HAZARD Keep hands feet and cl...

Page 14: ...ad is for RIGHT HAND ROTATION clockwise as viewed from the operator s position and that the trimmer head adapter is a female M8 x 1 25 right hand thread 1 Align the hole in the boss adapter with the g...

Page 15: ...IAL HAZARD In certain conditions gasoline is extreme ly 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...

Page 16: ...UEL ADDITIVES OTHER THAN THOSE MANUFACTURED FOR FUEL STABILIZATION DURING STORAGE SUCH AS MARUYAMA S STABILIZER CONDITIONER OR A SIMILAR PRODUCT MARUYAMA S STABILIZER CONDITION ER IS A PETROLEUM DISTI...

Page 17: ...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 Sto...

Page 18: ...arbu retor 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 tri...

Page 19: ...allow the engine to return to idle speed when not cutting 7 Stop the Trimmer engine when moving between work sites If the trimmer head becomes jammed stop the engine immediately Make certain all movin...

Page 20: ...cutting the vegetation off at the surface Mowing Keep the line parallel to the ground and use a gentle side to side motion Brushcutter Operation INCORRECT Three inches 7 6 cm Above Ground WARNING POT...

Page 21: ...uld not stall stop running at engine idle speed To adjust the engine idle speed rotate the idle speed adjustment screw on the carburetor Turn the idle speed screw in clockwise to increase the engine i...

Page 22: ...nt The fuel filter is attached to the end of the fuel pick up hose inside the fuel tank To replace the fuel filter 1 Make sure the fuel tank is empty 2 Remove the fuel cap 3 Using a wire hook gently p...

Page 23: ...en the spark plug when installing The tightening torque is 95 148 in lbs 10 7 16 6 N m Cylinder Cooling Fins Maintenance Interval The cylinder cooling fins should be cleaned after every 25 hours of op...

Page 24: ...ld 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 th...

Page 25: ...el 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 rem...

Page 26: ...set to off position Move switch to on position Empty fuel tank Fill fuel tank Primer bulb wasn t pushed enough Press primer bulb until fuel flows through fuel return line Engine flooded Use warm engin...

Page 27: ...lbs 4 6 Kg 4 4 Kg Engine Displacement 22 5 cm3 Anti Vibration Engine mount Loop Handle Grip Carburetor Walbro Diaphragm Type Ignition System Solid State Fuel Tank Capacity 0 58 qts 0 55 Gas to Oil Ra...

Page 28: ...Maruyama U S Inc Post Office Box 309 Auburn WA 98071 0309 253 735 7368 voice 253 735 1416 fax www maruyama us com 226405 00 03 07 TAP M...

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