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Troy-Bilt Horse TB525CS - User Manual

Troy-Bilt Horse TB525CS
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Operator’s Manual
4-Cycle Gasoline Trimmer
HORSE TB525CS /
BIG RED TB575SS
SAVE THESE INSTRUCTIONS
For service call 1-800-828-5500 in the United States, or
1-800-668-1238 in Canada to obtain a list of authorized service
dealers near you. For more details about your unit, visit our
website at www.troybilt.com.
DO NOT RETURN THE UNIT TO THE RETAILER. PROOF OF
PURCHASE WILL BE REQUIRED FOR WARRANTY
SERVICE.
THIS PRODUCT IS COVERED BY ONE OR MORE U.S.
PATENTS. OTHER PATENTS PENDING.
Service on this unit both within and after the warranty period
should be performed only by an authorized and approved
service dealer.
All information, illustrations, and specifications in this manual
are based on the latest product information available at the
time of printing. We reserve the right to make changes at any
time without notice.
Copyright© 2006 MTD SOUTHWEST INC, All Rights Reserved.
WARNING: When using the unit, you must follow
the safety rules. Please read these instructions
before operating the unit in order to ensure the
safety of the operator and any bystanders. Please
keep these instructions for later use.
SPARK ARRESTOR NOTE
NOTE: For users on U.S. Forest Land and in the states of
California, Maine, Oregon and Washington. All U.S. Forest
Land and the state of California (Public Resources Codes 4442
and 4443), Oregon and Washington require, by law that certain
internal combustion engines operated on forest brush and/or
grass-covered areas be equipped with a spark arrestor,
maintained in effective working order, or the engine be
constructed, equipped and maintained for the prevention of
fire. Check with your state or local authorities for regulations
pertaining to these requirements. Failure to follow these
requirements could subject you to liability or a fine. This unit is
factory equipped with a spark arrestor. If it requires
replacement, ask your LOCAL SERVICE DEALER to install the
Accessory Part # 753-05255 Spark Arrestor Kit.
CALIFORNIA PROPOSITION 65 WARNING
P/N 769-01920B (12/06)
TABLE OF CONTENTS
Service Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Rules for Safe Operation . . . . . . . . . . . . . . . . . . . . . . . . . .2
Know Your Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Assembly Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Oil and Fuel Information . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Starting/Stopping Instructions . . . . . . . . . . . . . . . . . . . . . .7
Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Maintenance and Repair Instructions . . . . . . . . . . . . . . .10
Cleaning and Storage . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Troubleshooting Chart . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Warranty Information . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E20
WARNING
THE ENGINE EXHAUST FROM THIS PRODUCT CONTAINS
CHEMICALS KNOWN TO THE STATE OF CALIFORNIA TO
CAUSE CANCER, BIRTH DEFECTS OR OTHER
REPRODUCTIVE HARM.

Questions and Answers

  • C
    Cindy JohnsonAug 16, 2025
    How to fix Troy-Bilt Trimmer that will not idle?
    • M
      Marc WrightAug 16, 2025
      If your Troy-Bilt Trimmer engine won't idle, here are a few possible solutions: * Air filter is plugged: Replace or clean the air filter. * Old fuel: Drain the gas tank and add fresh fuel. * Improper carburetor adjustment: Adjust according to the Carburetor Adjustments section or take to an authorized service dealer for an adjustment.
  • R
    Rebecca OneillAug 22, 2025
    Why is Troy-Bilt Trimmer cutting line advances uncontrollably?
    • M
      Mrs. Amanda WellsAug 22, 2025
      If the cutting line on your Troy-Bilt Trimmer advances uncontrollably, it is likely due to oil, cleaner, or lubricant in the cutting head. To resolve this, clean and thoroughly dry the cutting head.
  • J
    James FosterAug 26, 2025
    Why Troy-Bilt Trimmer engine will not start?
    • N
      Nathan DuffyAug 26, 2025
      Several factors can prevent your Troy-Bilt Trimmer from starting. It could be due to an empty fuel tank, so ensure you fill it with fuel. Check that you have pressed the primer bulb fully and slowly 10 times. Make sure the On/Off control is in the ON position, not STOP. Old or improperly mixed fuel can also be a culprit, so drain the tank and add fresh fuel. A fouled spark plug or a plugged spark arrestor may also be the reason; in that case, replace or clean the spark plug and clean or replace the spark arrestor.
  • J
    jeanramirezAug 28, 2025
    What to do if Troy-Bilt Trimmer cutting attachment will not advance line?
    • L
      Latasha CaldwellAug 28, 2025
      If the cutting attachment on your Troy-Bilt Trimmer won't advance the line, here are some things to check: 1. Stop the engine and clean the cutting attachment if it's bound with grass. 2. Refill with new line if the cutting attachment is out of line. 3. Replace the inner reel if it's bound up. 4. Clean the inner reel and outer spool if the cutting head is dirty. 5. Disassemble, remove the welded section, and rewind if the line is welded. 6. Disassemble and rewind the line if it's twisted. 7. Push the bump knob and pull out the line until 4 inches (102 mm) of line is outside of the cutting attachment if not enough line is exposed.
  • H
    haneyashleyAug 31, 2025
    What to do if cutting line advances uncontrollably on Troy-Bilt Trimmer?
    • C
      Christopher OdomAug 31, 2025
      If the cutting line on your Troy-Bilt Trimmer advances uncontrollably, it's likely due to oil, cleaner, or lubricant in the cutting head. To resolve this, clean and thoroughly dry the cutting head.
  • A
    Ashlee GuerreroSep 3, 2025
    Why Troy-Bilt Trimmer engine will not accelerate?
    • J
      Jose SilvaSep 3, 2025
      If your Troy-Bilt Trimmer engine won't accelerate, it could be due to several reasons: * Old fuel: Drain the gas tank and add fresh fuel. * Cutting attachment bound with grass: Stop the engine and clean the cutting attachment. * Dirty air filter: Clean or replace the air filter. * Plugged spark arrestor: Clean or replace the spark arrestor.
  • E
    edward05Sep 6, 2025
    What to do if Troy-Bilt Trimmer engine lacks power or stalls?
    • L
      Lisa RogersSep 6, 2025
      If your Troy-Bilt Trimmer engine lacks power or stalls, consider these potential causes: * Old fuel: Drain the gas tank and add fresh fuel. * Fouled spark plug: Replace or clean the spark plug. * Plugged spark arrestor: Clean or replace the spark arrestor.
  • C
    Carrie GravesSep 9, 2025
    What to do if Troy-Bilt Trimmer engine lacks power or stalls when cutting?
    • A
      Anna HernandezSep 9, 2025
      If your Troy-Bilt Trimmer engine lacks power or stalls while cutting, consider these potential causes: old or improperly mixed fuel, which requires draining the gas tank and adding fresh fuel; improper carburetor adjustment, which may need adjustment according to the Carburetor Adjustments section or professional servicing; a fouled spark plug, suggesting replacement or cleaning; or a plugged spark arrestor, which should be cleaned or replaced.
  • S
    shelia72Sep 10, 2025
    What to do if Troy-Bilt Trimmer cutting attachment will not advance?
    • S
      Sean JacobsSep 12, 2025
      If the cutting attachment on your Troy-Bilt Trimmer isn't advancing, here are some things to check: * Cutting attachment bound with grass: Stop the engine and clean cutting attachment. * Cutting attachment out of line: Refill with new line. * Inner reel bound up: Replace the inner reel. * Cutting head dirty: Clean inner reel and outer spool. * Line welded: Disassemble, remove the welded section and rewind. * Line twisted when refilled: Disassemble and rewind the line. * Not enough line is exposed: Push the bump head and pull out line until 4 inches (102 mm) of line is outside of the cutting attachment.
  • A
    amymartinSep 12, 2025
    How to fix Troy-Bilt Trimmer engine that will not idle?
    • J
      Janet ShermanSep 12, 2025
      If your Troy-Bilt Trimmer engine won't idle, possible causes include a plugged air filter, which should be replaced or cleaned. Old or improperly mixed fuel can also be a factor; in that case, drain the gas tank and add fresh fuel. Another potential cause is improper carburetor adjustment. It can be adjusted according to the Carburetor Adjustments section or you can take it to an authorized service dealer for an adjustment.

Troy-Bilt Horse TB525CS Specifications

General IconGeneral
BrandTroy-Bilt
ModelHorse TB525CS
CategoryTrimmer
LanguageEnglish

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