Troy-Bilt TB675 EC User Manual (English)

Questions and Answers:

N
Nathan EllisAug 6, 2025
Why won't my Troy-Bilt TB675 EC engine start?
- M
  Miranda AlvarezAug 6, 2025
  If your Troy-Bilt Trimmer engine won't start, several factors could be at play. First, ensure the fuel tank isn't empty; if it is, refill it with fresh fuel. If you haven't pressed the primer bulb enough, try pressing it 10 times. Old fuel (over 30 days) can also be a culprit; in that case, drain the tank and add fresh fuel. A fouled spark plug might also be the issue, requiring a replacement. Finally, if the engine is hot, consult the 'IF... THE ENGINE IS HOT' instructions in the Starting and Stopping section.
D
david10Aug 11, 2025
How to fix a Troy-Bilt TB675 EC that will not idle?
- R
  Robert RiceAug 11, 2025
  If your Troy-Bilt Trimmer engine won't idle, it could be due to a dirty air filter, in which case you should clean or replace it. Another possibility is old fuel (over 30 days); if this is the case, drain the fuel tank and add fresh fuel. Finally, the idle speed might be incorrect, so you should adjust it.
C
cevansAug 15, 2025
What to do if the cutting head on my Troy-Bilt TB675 EC will not advance line?
- B
  Billy GrayAug 16, 2025
  If the cutting head on your Troy-Bilt Trimmer won't advance the line, several issues could be responsible. Check if the cutting head is bound with grass and clean it if necessary. Also see if the cutting head is out of line and refill it with new line. Other possible causes include a bound-up inner reel (clean the inner reel and outer spool), a dirty cutting head (open the cutting head and remove the welded section), welded line (rewind the line), twisted line (stop the unit, push the bump knob, and pull the line until 4 inches (102 mm) is outside of the cutting head), or not enough line extended (clean and thoroughly dry the cutting head).
J
Joseph JimenezAug 20, 2025
Why does my Troy-Bilt TB675 EC engine lack power or stall?
- P
  Paul WoodwardAug 21, 2025
  If your Troy-Bilt Trimmer engine lacks power or stalls, consider these potential causes: old fuel (over 30 days), which means you should drain the fuel tank and add fresh fuel; a dirty air filter, suggesting you clean or replace it; or a fouled spark plug, indicating it's time for a replacement.
K
Kenneth GarciaAug 26, 2025
What to do if my Troy-Bilt TB675 EC engine will not accelerate?
- T
  Tracy DawsonAug 26, 2025
  If your Troy-Bilt Trimmer engine won't accelerate, several factors could be the cause. Old fuel (over 30 days) might be the issue, so drain the fuel tank and add fresh fuel. Alternatively, the cutting head might be bound with grass, requiring you to stop the engine and clean it. Lastly, a dirty air filter could be restricting performance, so clean or replace it.
A
Amber JenkinsAug 30, 2025
Why is the cutting line advancing uncontrollably on my Troy-Bilt Trimmer?
- B
  brooke66Aug 31, 2025
  If the cutting line on your Troy-Bilt Trimmer advances uncontrollably, it may be due to oil, cleaner, or lubricant in the cutting head. To resolve this, clean and thoroughly dry the cutting head.

Troy-Bilt TB675 EC Specifications

General

Engine Type	2-Cycle
Cutting Width	17 in
Line Diameter	0.095 in
Cutting System	Dual-Line
Shaft Type	Straight

Summary

SERVICE AND SUPPORT

WARRANTY ASSISTANCE AND CONTACTS

Contact Customer Support for assembly, operation, maintenance, and warranty. Visit website for details.

SAFETY GUIDELINES

CALIFORNIA PROPOSITION 65 WARNING

Warning about chemicals in engine exhaust and components known to cause cancer or birth defects.

IMPORTANT OPERATING SAFETY INSTRUCTIONS

General safety rules for operating the unit, including personal protection and inspection.

GAS UNIT SAFETY WARNINGS

Precautions for handling flammable gasoline and operating the unit safely.

WHILE OPERATING SAFETY

Guidelines for safe operation including protective gear, handling, and unit stability.

OTHER SAFETY WARNINGS AND PROCEDURES

Additional safety advice covering servicing, storage, and unit handling.

SAFETY SYMBOLS AND PICTOGRAMS

WARNING SYMBOLS AND MANUAL REFERENCE

Explanation of danger, warning, caution symbols and the importance of reading the operator's manual.

PERSONAL PROTECTION AND FUEL/OIL SAFETY

Guidance on protective gear, correct fuel and oil usage, and fuel type restrictions.

OPERATIONAL HAZARD PICTOGRAMS

Pictograms illustrating controls, safe operation procedures, and hazard warnings during use.

KNOW YOUR UNIT

UNIT SPECIFICATIONS AND APPLICATIONS

Technical details of the trimmer, including engine, dimensions, weight, and intended uses.

ASSEMBLY INSTRUCTIONS

INSTALLING THE CUTTING HEAD SHIELD

Instructions for attaching the cutting head shield for safety.

INSTALLING AND ADJUSTING THE HANDLE

Steps for mounting and adjusting the trimmer's handle for optimal grip.

COUPLER OPERATION

INSTALLING ATTACHMENTS

Procedure for securely attaching and locking optional attachments to the coupler.

REMOVING ATTACHMENTS

Steps for safely detaching attachments from the unit's coupler.

OIL AND FUEL REQUIREMENTS

USING THE CORRECT OIL

Guidance on using high-quality SAE 30 weight oil for engine lubrication.

ADDING OIL FOR INITIAL USE

Step-by-step instructions for adding the correct amount of oil before first use.

FUEL MANAGEMENT

FUEL SELECTION AND ADDITIVES

Information on fresh unleaded gasoline, fuel blends, additives, and E85 restrictions.

FUELING THE UNIT SAFELY

Detailed instructions for safely adding gasoline to the fuel tank, including precautions.

STARTING AND STOPPING THE ENGINE

STARTING PROCEDURE

Step-by-step guide for starting the trimmer's engine, including choke and throttle use.

STOPPING PROCEDURE

Procedure for safely shutting down the trimmer engine using the throttle and on/off switch.

ELECTRIC START ACCESSORY OPERATION

STARTING WITH ELECTRIC ACCESSORY

Steps for starting the trimmer using the optional electric start accessory.

STOPPING WITH ELECTRIC ACCESSORY

Procedure for stopping the trimmer when using the electric start accessory.

OPERATING THE TRIMMER

HOLDING AND BALANCING THE UNIT

Proper techniques for holding and positioning the trimmer during operation.

ADJUSTING THE TRIMMING LINE LENGTH

How to extend trimmer line using the bump head mechanism.

DECORATIVE TRIMMING TECHNIQUE

Technique for decorative trimming around objects using a 30° angle.

MAINTENANCE SCHEDULE AND TASKS

REQUIRED MAINTENANCE SCHEDULE

Schedule of required maintenance tasks and their frequencies.

REPLACING THE TRIMMING LINE

Instructions for installing new trimming line into the cutting head.

MAINTENANCE PROCEDURES

REMOVING OLD TRIMMING LINE

Steps to clear old line and debris from the cutting head assembly.

CHECKING THE ENGINE OIL LEVEL

How to inspect the engine oil level using the oil level window.

ROUTINE MAINTENANCE TASKS

CHANGING THE ENGINE OIL

Procedure for draining and refilling the engine oil while the unit is warm.

MAINTAINING THE AIR FILTER

Instructions for cleaning and re-oiling the air filter for optimal engine performance.

ENGINE ADJUSTMENTS AND SPARK PLUG CARE

ADJUSTING THE IDLE SPEED

How to adjust the idle speed screw for smooth engine idling.

MAINTAINING THE SPARK PLUG

Steps for inspecting, cleaning, gapping, and replacing the spark plug.

CLEANING AND STORAGE GUIDELINES

CLEANING THE UNIT EXTERIOR

Guidelines for cleaning the exterior of the unit safely.

SHORT AND LONG-TERM STORAGE

Instructions for storing the unit for short-term and long-term periods.

POST-STORAGE PREPARATION

Steps to prepare the unit for operation after extended storage.

TROUBLESHOOTING COMMON PROBLEMS

ENGINE STARTING ISSUES

Solutions for common issues preventing the engine from starting.

ENGINE IDLE AND ACCELERATION PROBLEMS

Troubleshooting steps for engines that won't idle or accelerate properly.

CUTTING HEAD LINE FEED PROBLEMS

Solutions for issues related to advancing or controlling the cutting line.

MANUFACTURER'S LIMITED WARRANTY

OBTAINING WARRANTY SERVICE

Procedure for obtaining warranty service, including contact details and website.

WARRANTY EXCLUSIONS AND LIMITATIONS

Cases and parts not covered by the limited manufacturer's warranty.

STATE LAW RELATIONS TO WARRANTY

Explanation of how state law affects the terms of the limited warranty.

Troy-Bilt TB675 EC User Manual

Table of Contents