Troy-Bilt TB304C EC - User Manual

Questions and Answers

C
Charles MartinAug 6, 2025
What to do if the cutting head of my Troy-Bilt TB304C EC will not advance line?
- A
  Adrienne ClarkAug 6, 2025
  If the cutting head on your Troy-Bilt Trimmer won't advance the line, several issues could be the cause. First, stop the engine and clean the cutting head if it is bound with grass. If the cutting head is out of line, refill it with new line. You should also clean the inner reel and outer spool in case the inner reel is bound up. If the cutting head is dirty, open it and remove any welded sections. If the line is welded, rewind it. If the line is twisted, stop the unit, push the bump knob, and pull the line until 4 inches (102 mm) are outside of the cutting head. If not enough line is extended, clean and thoroughly dry the cutting head.
S
shannon42Aug 12, 2025
Why is the cutting line advancing uncontrollably on my Troy-Bilt TB304C EC Trimmer?
- R
  Raymond GoodAug 12, 2025
  If the cutting line on your Troy-Bilt Trimmer is advancing uncontrollably, it may be because there is oil, cleaner, or lubricant in the cutting head. Clean and thoroughly dry the cutting head to resolve this issue.
B
becky29Aug 19, 2025
Why does my Troy-Bilt TB304C EC engine lack power or stall?
- A
  Amber Roth DVMSep 12, 2025
  Your Troy-Bilt Trimmer engine might lack power or stall due to several reasons. Old fuel (over 30 days) can cause this issue, so drain the fuel tank and add fresh fuel. Also, a dirty air filter can restrict airflow, so clean or replace it. Lastly, a fouled spark plug can also lead to power loss, so replace it if necessary.
C
Cameron WaltersAug 25, 2025
What to do if my Troy-Bilt Trimmer engine will not accelerate?
- Y
  Yolanda BellAug 25, 2025
  If your Troy-Bilt Trimmer engine won't accelerate, it could be due to a few reasons. Start by draining the fuel tank and adding fresh fuel if the fuel is old (over 30 days). Another possibility is that the cutting head is bound with grass; if so, stop the engine and clean the cutting head. A dirty air filter can also cause acceleration problems, so clean or replace it.
M
Marisa WhitakerAug 30, 2025
Why Troy-Bilt TB304C EC engine will not idle?
- A
  April SilvaAug 30, 2025
  If your Troy-Bilt Trimmer engine won't idle, it could be due to a dirty air filter; clean or replace it. Old fuel (over 30 days) can also cause idling issues, so drain the fuel tank and add fresh fuel. Also, the idle speed might be incorrect, so adjust the idle speed.

Summary

Service Information

General Safety Overview

Important Safety Instructions

Pre-Operation Safety Checks

Emphasizes reading manual for safety.

Gasoline Unit Safety

Covers gasoline flammability and explosion hazards.

Safe Operation Practices

Precautions to take during operation.

Additional Safety Warnings

Covers maintenance, safety devices, storage, and cleaning precautions.

Safety and International Symbols

Symbol Meanings Explained

Explains various safety symbols and their significance.

Hazard and Warning Symbols

Details specific warnings like thrown objects, hot surfaces, and sharp blades.

Know Your Unit

Unit Applications and Specifications

Details applications, required tools, and technical specs.

Assembly Procedures

Installing Cutting Head Shield

Step-by-step guide to attach the cutting head shield.

Attaching and Detaching Attachments

How to attach and detach accessories using the coupler.

Handle Installation and Adjustment

Guide to mount and position the unit's handle.

Shoulder Strap Usage

Assembling the Shoulder Strap

Instructions for putting the shoulder strap together.

Wearing and Adjusting Shoulder Strap

How to wear and adjust the shoulder strap.

Oil and Fuel Management

Engine Oil Procedures

Guidance on using, adding, and checking the engine oil.

Fuel Handling and Types

Information on fuel types, blends, additives, and proper use.

Fueling the Unit Safely

Fueling Warnings and Procedure

Critical safety warnings and step-by-step instructions for refueling.

Starting and Stopping the Engine

Engine Starting Procedure

Detailed steps for starting the engine using primer and choke.

Engine Stopping Procedure

How to safely turn off the engine using the On/Off switch.

Electric Start Accessory Guide

Using the Electric Start System

Instructions for starting and stopping with the optional electric start.

Trimmer Operation

Unit Handling and Line Adjustment

Covers holding the unit, adjusting line, and general tips.

Trimming Techniques

Methods for decorative trimming and edging.

Trimming Line Care

Care for the trimming line on hard surfaces.

Maintenance Schedule and Tasks

Maintenance Schedule and Line Replacement

Overview of scheduled maintenance and replacing trimmer line.

Removing Old Trimming Line

Instructions for clearing the cutting head of old line.

Oil Level and Change Procedures

Checking Engine Oil Level

Procedure to check the engine oil level.

Changing Engine Oil

Procedure for draining and refilling the engine oil.

Air Filter, Idle Speed, and Spark Plug

Maintaining the Air Filter

Steps for cleaning and maintaining the air filter.

Idle Speed and Spark Plug Maintenance

How to set idle speed and maintain the spark plug.

Cleaning and Storage Guidelines

Cleaning the Unit

Steps for cleaning the exterior of the trimmer.

Unit Storage Instructions

Guidelines for storing the unit for short and long periods.

Troubleshooting Common Issues

Engine and Cutting Head Problems

Common problems with the engine and cutting head and their solutions.

Warranty and Service Information

Manufacturers Limited Warranty

Explains the warranty coverage, duration, and limitations.

Obtaining Service and Support

Information on contacting support and getting warranty service.

Summary

Service Information

General Safety Overview

Important Safety Instructions

Pre-Operation Safety Checks

Emphasizes reading manual for safety.

Gasoline Unit Safety

Covers gasoline flammability and explosion hazards.

Safe Operation Practices

Precautions to take during operation.

Additional Safety Warnings

Covers maintenance, safety devices, storage, and cleaning precautions.

Safety and International Symbols

Symbol Meanings Explained

Explains various safety symbols and their significance.

Hazard and Warning Symbols

Details specific warnings like thrown objects, hot surfaces, and sharp blades.

Know Your Unit

Unit Applications and Specifications

Details applications, required tools, and technical specs.

Assembly Procedures

Installing Cutting Head Shield

Step-by-step guide to attach the cutting head shield.

Attaching and Detaching Attachments

How to attach and detach accessories using the coupler.

Handle Installation and Adjustment

Guide to mount and position the unit's handle.

Shoulder Strap Usage

Assembling the Shoulder Strap

Instructions for putting the shoulder strap together.

Wearing and Adjusting Shoulder Strap

How to wear and adjust the shoulder strap.

Oil and Fuel Management

Engine Oil Procedures

Guidance on using, adding, and checking the engine oil.

Fuel Handling and Types

Information on fuel types, blends, additives, and proper use.

Fueling the Unit Safely

Fueling Warnings and Procedure

Critical safety warnings and step-by-step instructions for refueling.

Starting and Stopping the Engine

Engine Starting Procedure

Detailed steps for starting the engine using primer and choke.

Engine Stopping Procedure

How to safely turn off the engine using the On/Off switch.

Electric Start Accessory Guide

Using the Electric Start System

Instructions for starting and stopping with the optional electric start.

Trimmer Operation

Unit Handling and Line Adjustment

Covers holding the unit, adjusting line, and general tips.

Trimming Techniques

Methods for decorative trimming and edging.

Trimming Line Care

Care for the trimming line on hard surfaces.

Maintenance Schedule and Tasks

Maintenance Schedule and Line Replacement

Overview of scheduled maintenance and replacing trimmer line.

Removing Old Trimming Line

Instructions for clearing the cutting head of old line.

Oil Level and Change Procedures

Checking Engine Oil Level

Procedure to check the engine oil level.

Changing Engine Oil

Procedure for draining and refilling the engine oil.

Air Filter, Idle Speed, and Spark Plug

Maintaining the Air Filter

Steps for cleaning and maintaining the air filter.

Idle Speed and Spark Plug Maintenance

How to set idle speed and maintain the spark plug.

Cleaning and Storage Guidelines

Cleaning the Unit

Steps for cleaning the exterior of the trimmer.

Unit Storage Instructions

Guidelines for storing the unit for short and long periods.

Troubleshooting Common Issues

Engine and Cutting Head Problems

Common problems with the engine and cutting head and their solutions.

Warranty and Service Information

Manufacturers Limited Warranty

Explains the warranty coverage, duration, and limitations.

Obtaining Service and Support

Information on contacting support and getting warranty service.

Troy-Bilt TB304C EC Specifications

General

Engine Type	2-Cycle
Shaft Type	Straight
Line Diameter	0.095 inches
Start System	Pull start
Cutting System	Dual-Line
Cutting Width	17 inches

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Troy-Bilt TB304C EC - User Manual

Table of Contents

Questions and Answers

Summary

Service Information

General Safety Overview

Important Safety Instructions

Pre-Operation Safety Checks

Gasoline Unit Safety

Safe Operation Practices

Additional Safety Warnings

Safety and International Symbols

Symbol Meanings Explained

Hazard and Warning Symbols

Know Your Unit

Unit Applications and Specifications

Assembly Procedures

Installing Cutting Head Shield

Attaching and Detaching Attachments

Handle Installation and Adjustment

Shoulder Strap Usage

Assembling the Shoulder Strap

Wearing and Adjusting Shoulder Strap

Oil and Fuel Management

Engine Oil Procedures

Fuel Handling and Types

Fueling the Unit Safely

Fueling Warnings and Procedure

Starting and Stopping the Engine

Engine Starting Procedure

Engine Stopping Procedure

Electric Start Accessory Guide

Using the Electric Start System

Trimmer Operation

Unit Handling and Line Adjustment

Trimming Techniques

Trimming Line Care

Maintenance Schedule and Tasks

Maintenance Schedule and Line Replacement

Removing Old Trimming Line

Oil Level and Change Procedures

Checking Engine Oil Level

Changing Engine Oil

Air Filter, Idle Speed, and Spark Plug

Maintaining the Air Filter

Idle Speed and Spark Plug Maintenance

Cleaning and Storage Guidelines

Cleaning the Unit

Unit Storage Instructions

Troubleshooting Common Issues

Engine and Cutting Head Problems

Warranty and Service Information

Manufacturers Limited Warranty

Obtaining Service and Support

Summary

Service Information

General Safety Overview

Important Safety Instructions

Pre-Operation Safety Checks

Gasoline Unit Safety

Safe Operation Practices

Additional Safety Warnings

Safety and International Symbols

Symbol Meanings Explained

Hazard and Warning Symbols

Know Your Unit

Unit Applications and Specifications

Assembly Procedures

Installing Cutting Head Shield

Attaching and Detaching Attachments

Handle Installation and Adjustment

Shoulder Strap Usage

Assembling the Shoulder Strap

Wearing and Adjusting Shoulder Strap

Oil and Fuel Management

Engine Oil Procedures

Fuel Handling and Types

Fueling the Unit Safely

Fueling Warnings and Procedure

Starting and Stopping the Engine