Bolens BL110 User Manual: A Comprehensive Guide
Welcome! This manual provides detailed instructions for safe operation, maintenance, and troubleshooting of your Bolens BL110 curved shaft string trimmer.
Access PDF versions and explore YouTube resources for enhanced support and understanding of your new equipment.
Congratulations on selecting the Bolens BL110 curved shaft string trimmer! This user manual serves as a comprehensive guide to ensure optimal performance and longevity of your new landscaping tool. The BL110 is designed for efficient and reliable trimming around lawns, gardens, and hard-to-reach areas.

Before first use, carefully review this manual, paying close attention to the safety precautions and operating instructions. Familiarize yourself with all components and their functions. You’ll find valuable resources, including a downloadable PDF version of the operator’s manual, and helpful YouTube tutorials to assist with assembly, operation, and maintenance.

Proper understanding of this guide will help you maximize the BL110’s capabilities while ensuring your safety and the safety of those around you.
Safety Precautions and Warnings
Prioritize safety when operating the Bolens BL110. Always wear appropriate personal protective equipment (PPE), including eye protection, hearing protection, long pants, and sturdy footwear. Never operate the trimmer without the safety guard properly installed.
Be aware of your surroundings and keep bystanders, especially children and pets, at a safe distance. Inspect the trimmer before each use for any damaged parts. Never modify the trimmer or use accessories not recommended by the manufacturer.
Avoid operating the BL110 in wet or damp conditions. Always disconnect the spark plug wire before performing any maintenance or repairs. Refer to the operator’s manual for detailed safety instructions and pictographs.
Understanding the Components

The Bolens BL110 consists of several key components working in unison. These include the engine, providing the power; the curved shaft, enabling reach; and the cutting head, housing the string for trimming. The handle offers control, while the trigger initiates operation.
Familiarize yourself with the fuel tank, air filter, and spark plug for maintenance purposes. The string spool within the cutting head dictates trimming capability. Understanding each part’s function, as detailed in the manual, is crucial for safe and effective use.
Refer to the parts diagram for visual identification and proper assembly. Knowing these components aids in troubleshooting and repair.
Identifying Key Parts of the BL110
Essential parts include the 25cc engine, powering the trimmer, and the curved shaft, providing extended reach for trimming. The cutting head houses the string spool and facilitates grass and weed cutting. The adjustable handle ensures comfortable operation, while the throttle trigger controls engine speed.
Locate the fuel tank for gasoline, the air filter for engine protection, and the spark plug for ignition. The string feed mechanism releases line as needed. The guard protects the operator from debris. Refer to the manual’s diagrams for precise locations and functions of each component.
Proper identification is vital for maintenance and repairs.
Bolens BL110 Parts Diagram
The Bolens BL110 parts diagram, available in the operator’s manual (often as a PDF), visually details each component. It showcases the engine assembly, including the carburetor and cylinder. The diagram illustrates the curved shaft’s connection points and the cutting head’s internal structure, highlighting the spool and line exit.
Key parts like the fuel tank, air filter, and spark plug are clearly labeled. The throttle control, handle assembly, and safety guard are also depicted. This visual guide is invaluable for identifying parts during maintenance, repairs, or when ordering replacements. Refer to figure 7.9 on page 54 for specific details.
Assembly Instructions
Prior to initial use, careful assembly is crucial for optimal performance and safety. Begin by unpacking all components and verifying against the parts list in the manual. The first step involves attaching the cutting head securely to the drive shaft, ensuring proper alignment and tightening.
Next, connecting the shaft and engine requires aligning the connection points and firmly fastening them together. Double-check all connections to prevent loosening during operation. Always refer to the Bolens BL110 operator’s manual for detailed diagrams and torque specifications. Proper assembly ensures safe and efficient trimming.
Attaching the Cutting Head
Begin by carefully aligning the cutting head with the drive shaft. Ensure the shaft’s retaining clip is properly positioned to accept the head. Gently push the cutting head onto the drive shaft until it clicks securely into place.
Rotate the head to confirm it spins freely. If resistance is felt, re-align and re-attach. Tighten the head’s retaining knob, but avoid over-tightening, which could damage the components. Consult the Bolens BL110 manual for specific torque recommendations. A properly attached cutting head is vital for safe and effective operation.
Connecting the Shaft and Engine
Carefully slide the drive shaft into the engine housing, aligning the connection points. Ensure the shaft is fully inserted and secured with the provided retaining bolt. Tighten the bolt firmly, referencing the Bolens BL110 manual for the correct torque specification to prevent loosening during operation.
Verify the shaft rotates smoothly within the housing without binding. A secure connection is crucial for transferring power from the engine to the cutting head. Double-check all connections before starting the engine to avoid potential damage or injury.
Operating Instructions
Before each use, inspect the Bolens BL110 for any damage or loose parts, consulting the manual for detailed checks. Ensure the area is clear of obstacles and people. Always wear appropriate safety gear, including eye protection and sturdy footwear.
To start, prime the engine, set the choke, and pull the starter cord firmly. Once running, gradually release the choke. Hold the unit firmly with both hands, maintaining a balanced stance. Familiarize yourself with the throttle control for optimal trimming performance. Refer to the manual for specific operating guidelines;
Starting the Engine
Prior to starting, ensure the Bolens BL110 is on a level surface and the cutting head is clear of obstructions; Prime the engine by pressing the primer bulb several times until fuel is visible. Set the choke lever to the ‘start’ position. Grip the starter handle firmly and pull the cord with a smooth, controlled motion.
Avoid retracting the starter cord rapidly. Once the engine sputters, gradually open the choke. If the engine doesn’t start after several attempts, consult the manual’s troubleshooting section. Always maintain a firm grip and safe distance during starting.
Proper Trimming Techniques
When using the Bolens BL110, maintain a safe distance from obstacles like trees, fences, and structures. Utilize a sweeping motion, moving the trimmer head from side to side, to achieve a clean and even cut. Avoid forcing the trimmer into thick vegetation; instead, make multiple passes at varying angles.
Keep the cutting head slightly angled towards the direction of travel for optimal performance. Be mindful of debris and adjust your technique to minimize kickback. Always wear appropriate safety gear, including eye protection, during operation. Regular checks of the string length are crucial for efficient trimming.
String Replacement
Maintaining the correct string length is vital for optimal Bolens BL110 performance. Regularly inspect the string for wear and tear, replacing it when needed. Using the correct type of string ensures efficient trimming and prevents damage to the trimmer head. The operator’s manual details compatible string types for various cutting conditions.

A step-by-step guide for string replacement is included within this manual, simplifying the process. Ensure the engine is off and the spark plug is disconnected before attempting any maintenance. Proper string installation prevents feed issues and maximizes cutting efficiency. Refer to the diagrams for correct winding direction.
Types of String Compatible with BL110
The Bolens BL110 is designed to work with various string types, offering flexibility for different trimming needs. Common compatible options include round, square, and multi-sided string. Round string is versatile for general trimming, while square or multi-sided string provides enhanced cutting power for thicker weeds.
String diameter is also crucial; the manual recommends specific sizes for optimal performance. Using excessively thick string can strain the engine, while too-thin string may break easily. Always refer to the operator’s manual for the manufacturer’s recommended string specifications to ensure compatibility and longevity.
Step-by-Step String Replacement Guide
Begin by ensuring the engine is OFF and the spark plug is disconnected for safety. Locate the spool cover on the cutting head and remove it, typically by pressing release tabs. Pull out the empty spool and discard the old string.
Wind the new string onto the spool, following the arrow direction indicated on the spool housing. Secure the string ends within the spool’s retaining clips. Reinstall the spool into the cutting head, ensuring proper alignment. Replace the spool cover, and you’re ready to trim! Consult the manual for detailed diagrams.
Maintenance and Care
Regular maintenance ensures optimal performance and extends the life of your Bolens BL110. Periodically clean the air filter to maintain proper engine function; a dirty filter restricts airflow. Inspect the spark plug regularly, cleaning or replacing it as needed for reliable starting.
The fuel system requires attention too – use fresh fuel and consider a fuel stabilizer for storage. Always disconnect the spark plug before performing any maintenance. Refer to the manual for specific intervals and detailed instructions. Proper care guarantees a long-lasting trimmer!
Cleaning the Air Filter
A clean air filter is crucial for engine performance. Remove the air filter cover and carefully take out the filter element. Gently tap the filter to remove loose debris, or use low-pressure compressed air, blowing from the inside out.
Do not use water or solvents! If the filter is excessively dirty or damaged, replace it with a new one. Reinstall the clean filter and cover securely. Regularly checking and cleaning the air filter – ideally after every five hours of use – ensures optimal engine efficiency and prevents damage.
Spark Plug Maintenance
Regular spark plug maintenance is vital for reliable engine starting and performance. Periodically remove the spark plug and inspect the electrode for fouling, wear, or damage. Clean the plug with a wire brush if necessary, and ensure the gap is set to the manufacturer’s specification – consult your operator’s manual for the correct gap measurement.
Replace the spark plug annually, or sooner if issues arise. Always use the recommended spark plug type for your Bolens BL110. Proper spark plug maintenance contributes to fuel efficiency and reduces emissions, extending the life of your trimmer.
Fuel System Maintenance
Maintaining the fuel system ensures optimal engine performance and prevents starting problems. Always use fresh fuel and a fuel stabilizer, especially during storage, to prevent gum and varnish buildup. Periodically inspect the fuel lines for cracks or leaks, replacing them as needed.
The fuel filter should be replaced annually to prevent debris from clogging the carburetor. If the carburetor becomes clogged, a professional cleaning is recommended. Never use old or contaminated fuel, as it can damage the engine. Proper fuel system maintenance extends the life of your Bolens BL110.
Troubleshooting Common Issues

This section addresses frequent problems encountered with the Bolens BL110. If the engine won’t start, check the fuel level, spark plug connection, and air filter. String feed issues often stem from improper string loading or a dirty trimmer head – ensure correct installation.

For persistent problems, consult the detailed PDF manual or MTD Products support. Remember safety first; disconnect the spark plug before any inspection. Refer to YouTube resources for visual guidance on common repairs. Proper diagnosis and timely fixes will keep your trimmer running smoothly.
Engine Won’t Start
If your Bolens BL110 engine fails to start, first verify sufficient fuel and check the fuel line for obstructions. Inspect the spark plug – ensure it’s clean, properly gapped, and securely connected. A clogged air filter restricts airflow, hindering ignition; clean or replace it as needed.

Confirm the choke is correctly positioned for starting. Consult the operator’s manual for specific choke settings. YouTube tutorials can visually demonstrate these steps. If issues persist, review the PDF manual for detailed troubleshooting or contact MTD Products support for assistance.
String Feed Problems
Experiencing issues with string feed on your Bolens BL110? First, ensure you’re using compatible string types, as outlined in the manual. Check for tangled string within the spool and housing; carefully rewind the string, ensuring proper alignment; Verify the spool is correctly installed and secured.
A dirty or damaged spool can impede feed; clean or replace it. Consult YouTube videos demonstrating proper string loading techniques. Refer to the PDF operator’s manual for diagrams. If problems continue, contact MTD Products service for further guidance and potential repair options.
Understanding Safety Symbols and Pictographs
The Bolens BL110 operator’s manual prominently features safety symbols and pictographs to alert users to potential hazards. These visual cues are crucial for preventing injury during operation and maintenance. Pay close attention to symbols indicating risk of projectiles, rotating parts, and fuel handling.

Understanding these warnings – found throughout the manual and on the trimmer itself – is paramount. The manual details each symbol’s meaning, emphasizing the importance of wearing protective gear and following all safety instructions. Ignoring these warnings could lead to serious personal injury. Review the PDF version for a complete guide.
Detailed Specifications of the BL110
The Bolens BL110 curved shaft string trimmer boasts a 25cc two-cycle engine, delivering reliable power for various trimming tasks. Its 17-inch cutting swath efficiently handles grass and weeds. The engine requires a fuel mix of 50:1 (gasoline and 2-cycle engine oil) for optimal performance, as detailed in the manual.
The trimmer weighs approximately 11.8 pounds, offering a balance of power and maneuverability. Refer to the complete PDF operator’s manual for precise dimensions, sound power levels, and vibration data. These specifications are vital for understanding the unit’s capabilities and ensuring safe operation.
Warranty Information
Your Bolens BL110 string trimmer is covered by a limited warranty against defects in materials and workmanship. Please retain your proof of purchase for warranty service. The duration of the warranty varies depending on the component; typically, it covers defects for a period of one year from the original purchase date.
This warranty does not cover items subject to normal wear and tear, or damage resulting from misuse or improper maintenance. For complete warranty details, including specific terms and conditions, consult the PDF operator’s manual or visit the MTD Products website for further assistance.
Accessing the Full Operator’s Manual (PDF)
For a comprehensive understanding of your Bolens BL110, the complete operator’s manual is readily available in PDF format. This detailed document provides in-depth instructions on assembly, operation, maintenance, and safety precautions. You can easily download the PDF from the MTD Products website, specifically through their service and support section.
The manual includes detailed diagrams, troubleshooting guides, and warranty information. Having the PDF readily accessible on your computer or mobile device ensures you always have the information you need at your fingertips. Refer to http://service.mtdproducts.com/Training_Education/769_06465_25_cc_opp.pdf.
MTD Products Service and Support
MTD Products, the manufacturer of Bolens equipment, offers extensive service and support resources for your BL110 string trimmer. Their website provides access to frequently asked questions, helpful articles, and downloadable resources, including parts diagrams and additional manuals.
You can find a local authorized service dealer through their dealer locator tool, ensuring professional maintenance and repairs. MTD also offers online chat support and a customer service phone line for direct assistance. Explore their training and education materials at http://service.mtdproducts.com/Training_Education/769_06465_25_cc_opp.pdf for detailed guidance.
YouTube Resources for Bolens BL110

YouTube is a valuable resource for Bolens BL110 owners, offering numerous videos demonstrating assembly, operation, and maintenance procedures. Search for “Bolens BL110” to find tutorials on string replacement, engine starting, and troubleshooting common issues.
Many users share practical tips and solutions, supplementing the official manual. These videos can visually guide you through tasks, making them easier to understand. Remember to prioritize safety and follow all instructions carefully. Connecting to your YouTube account unlocks features like playlists and subscriptions for convenient access to relevant content.
YouTube Premium and Related Services
YouTube offers premium services like YouTube Premium and YouTube Music Premium, providing ad-free viewing, background playback, and access to exclusive content. While not directly related to the Bolens BL110 operation, these subscriptions enhance your overall YouTube experience.
Consider a yearly membership for prepaid benefits. These services don’t impact access to Bolens BL110 tutorial videos, but improve viewing convenience. Explore YouTube’s diverse offerings, including Movies, Fashion & Beauty, Gaming, and Live streams, alongside your equipment-related searches.
Connecting to YouTube Account
Connecting to your YouTube account unlocks personalized features crucial for utilizing tutorial videos related to your Bolens BL110. A Google Account is required for YouTube sign-in, enabling access to subscriptions, playlists, purchase history, and saved videos.
Sign in to manage viewing preferences and receive tailored recommendations for Bolens BL110 maintenance and repair content. This allows you to easily revisit helpful videos and create custom playlists for quick access. Ensure a stable internet connection during the sign-in process for a seamless experience.
YouTube Sign-In Instructions
To sign in to YouTube and access personalized features, navigate to the YouTube website or open the YouTube app. Locate the “Sign In” button, typically found in the top right corner of the screen. Click this button to initiate the sign-in process.
You will be prompted to enter your Google Account email or phone number, followed by your password. If you have multiple Google accounts, ensure you select the correct one. After entering your credentials, click “Next” to complete the sign-in. Successful sign-in grants access to subscriptions and viewing history.
