Troy-Bilt TB25CS - User Manual

Questions and Answers

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Brian DuncanJul 30, 2025
How to fix Troy-Bilt TB25CS Trimmer that will not start?
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  mitchellbrandonJul 30, 2025
  If your Troy-Bilt Trimmer engine won't start, it could be due to several reasons. First, ensure the fuel tank isn't empty and is filled with properly mixed fuel. If the primer bulb wasn't pressed enough, press it fully and slowly 10 times. If the engine is flooded, squeeze the trigger and pull the starter rope. Also, old or improperly mixed fuel can be a culprit; drain the gas tank and add fresh fuel mixture. Check for a fouled spark plug and replace or clean it. A plugged spark arrestor should be cleaned or replaced. Ensure the Blue EZ-Start™ lever is in the starting position. If the outside temperature is below 40º F, pull the starter rope up to 10-15 times; if above 90º F, squeeze the throttle control and pull the starter rope.
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jaimemorenoAug 3, 2025
What to do if Troy-Bilt TB25CS cutting attachment will not advance?
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  Michael MejiaAug 3, 2025
  If the cutting attachment on your Troy-Bilt Trimmer will not advance, it could be due to several reasons. The cutting attachment might be bound with grass, so stop the engine and clean the cutting attachment. Alternatively, the cutting attachment might be out of line, requiring you to refill it with a new line. An inner reel bound up may also be the cause, necessitating replacement of the inner reel. If the cutting head is dirty, clean the inner reel and outer spool. If the line is welded, disassemble, remove the welded section, and rewind. If the line was twisted when refilled, disassemble and rewind the line. Finally, if not enough line is exposed, push the bump knob and pull out the line until 4 inches (102 mm) of line is outside of the cutting attachment.
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Meghan KeyAug 8, 2025
Why Troy-Bilt TB25CS Trimmer cutting line advances uncontrollably?
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  murphyrandyAug 8, 2025
  If the cutting line advances uncontrollably on your Troy-Bilt Trimmer, it's likely due to oil, cleaner, or lubricant in the cutting head. Clean and thoroughly dry the cutting head to resolve this issue.
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Brian ChavezAug 14, 2025
Why does my Troy-Bilt TB25CS engine lack power?
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  Margaret MartinezAug 14, 2025
  If your Troy-Bilt Trimmer engine lacks power or stalls, the issue might stem from old or improperly mixed fuel, so drain the gas tank and add a fresh fuel mixture. It could also be due to an improper carburetor adjustment, in which case you should take it to an authorized service dealer for adjustment. A fouled spark plug can also cause this problem, so replace or clean the spark plug. Lastly, check for a plugged spark arrestor and clean or replace it.
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Anthony GarrettAug 18, 2025
What to do if Troy-Bilt Trimmer engine will not accelerate?
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  Juan SextonAug 18, 2025
  If your Troy-Bilt Trimmer engine won't accelerate, it might be due to old or improperly mixed fuel; drain the gas tank and add fresh fuel mixture. Another cause could be an improper carburetor adjustment, which requires taking it to an authorized service dealer for adjustment. Also, check if the cutting attachment is bound with grass; if so, stop the engine and clean the cutting attachment. A dirty air filter can also cause this, so clean or replace the air filter. Finally, a plugged spark arrestor can be the problem, so clean or replace it.
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Robert MorrisAug 25, 2025
Why Troy-Bilt Trimmer engine will not idle?
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  Mary HobbsAug 25, 2025
  If your Troy-Bilt Trimmer engine will not idle, it could be due to a plugged air filter; replace or clean the air filter. Old or improperly mixed fuel can also cause this issue, so drain the gas tank and add a fresh fuel mixture. Another possible cause is an improper carburetor adjustment; adjust it according to the Carburetor Adjustments section.

Summary

Rules for Safe Operation

While Operating

Important Safety Instructions

Critical guidelines for safe operation before using the unit.

Thrown Objects and Rotating Cutter Warning

Warning about severe injury from thrown objects and rotating cutting attachments.

Gas Unit Safety Warnings

Precautions for handling flammable gasoline and preventing ignition.

Assembly Instructions

Installing and Adjusting the D-Handle

Installing the Cutting Attachment Shield

Instructions for attaching the shield on straight and curved shaft models.

Oil and Fuel Information

Oil and Fuel Mixing Instructions

Guidelines for proper fuel and oil mixture ratios for 2-cycle engines.

Starting;Stopping Instructions

Starting Instructions

Step-by-step guide to start the engine, including Spring Assist.

Stopping Instructions

Operating Instructions

Operating the EZ-Link System

Holding the Trimmer

Proper posture and grip for operating the trimmer safely.

Removing the Cutting Attachment or Add-Ons

Adjusting Trimming Line Length

Installing the Cutting Attachment or Add-Ons

Maintenance and Repair Instructions

Maintenance Schedule

Recommended maintenance tasks and their frequency.

Winding the Inner Reel With New Line

Line Installation for the SpeedSpool

Instructions for installing trimming line on the SpeedSpool cutting head.

Maintenance and Repair Instructions

Air Filter Maintenance

How to remove, clean, and re-oil the air filter for optimal engine performance.

Spark Arrestor Maintenance

Carburetor Adjustment

Guidance on adjusting the idle speed screw for proper engine operation.

Replacing the Spark Plug

Troubleshooting

Engine Problems

Covers issues like not starting, idling, accelerating, or stalling.

Cutting Attachment Issues

Addresses problems with line advancement or uncontrollable line feeding.

Specifications

California; EPA Emission Control Warranty Statement

Manufacturers Limited Warranty

Troy-Bilt TB25CS Specifications

General

Engine Type	2-Cycle
Engine Displacement	25cc
Attachment Capable	Yes
Shaft Type	Straight
Cutting Width	17 inches
Line Diameter	0.095 inches
Handle Type	Loop
Start System	Spring Assist