Bolens BL110 - User Manual

Questions and Answers

R
riggsshelleyJul 27, 2025
Why my Bolens Trimmer engine will not start?
- M
  Matthew HopkinsJul 27, 2025
  If your Bolens Trimmer engine won't start, it might be due to several reasons. The fuel tank could be empty, so refill it with properly mixed fuel. You may not have pressed the primer bulb enough; try pressing it 10 times or until fuel is visible. The engine could be flooded; in that case, move the choke lever to Position 3, squeeze the throttle control, and pull the starter rope until the engine starts. Old or improperly mixed fuel can also be the culprit, so drain the tank and add fresh fuel. Lastly, the spark plug might be fouled, requiring a replacement.
C
Cathy JimenezJul 31, 2025
What to do if my Bolens BL110 Trimmer engine lacks power?
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  Timothy CruzAug 1, 2025
  If your Bolens Trimmer engine lacks power or stalls, the issue might stem from old or improperly mixed fuel; in this case, drain the fuel tank and add fresh, properly mixed fuel. Another potential cause is a dirty air filter, which should be cleaned or replaced. Lastly, a fouled spark plug could be the problem, and replacing it should resolve the issue.
T
Thomas RandallAug 5, 2025
Why Bolens Trimmer engine will not accelerate?
- A
  Amber AndersonAug 6, 2025
  If your Bolens Trimmer engine will not accelerate, it could be due to a few reasons. The fuel might be old or improperly mixed, so drain the fuel tank and add fresh, properly mixed fuel. The cutting head might be bound with grass; stop the engine and clean the cutting head. Also, check if the air filter is dirty and clean or replace it as needed.
A
anne75Aug 10, 2025
How to fix Bolens BL110 Trimmer when engine will not idle?
- J
  Joseph MoralesAug 10, 2025
  If your Bolens Trimmer engine won't idle, there are a few things you can check. First, the air filter might be dirty, so clean or replace it. Also, old or improperly mixed fuel can cause this issue, so drain the fuel tank and add fresh, properly mixed fuel. Finally, the idle speed might be incorrect, so try adjusting it.
E
Eric HowardAug 15, 2025
What to do if the cutting line advances uncontrollably on my Bolens BL110?
- L
  Lauren LewisAug 16, 2025
  If the cutting line on your Bolens Trimmer advances uncontrollably, it's likely due to oil, cleaner, or lubricant in the cutting head. To fix this, clean and thoroughly dry the cutting head.
D
Danny ChapmanAug 21, 2025
How to fix Bolens BL110 cutting head that will not advance line?
- H
  hurstsarahAug 21, 2025
  If the cutting head on your Bolens Trimmer won't advance the line (for bump heads only), several issues could be at play. The cutting head might be bound with grass, so stop the engine and clean it. The cutting head could be out of line, requiring you to refill it with new line. The inner reel might be bound up or the line twisted, so rewind the line. Also, the cutting head might be dirty, necessitating cleaning of the inner reel and outer spool. The line could be welded, requiring you to open the cutting head and remove the welded section. Finally, not enough line might be extended; stop the unit, push the bump knob, and pull the line until 4 inches (102 mm) extends outside the cutting head.

Summary

Safety

Spark Arrestor Note

Note on spark arrestor requirements for engines used in specific regions and on forest land.

Important Safety Instructions

Critical safety rules for operator and bystander protection before and during unit operation.

Safety Warnings for Gas Units

Precautions for safe handling and use of gasoline, emphasizing flammability and vapor hazards.

While Operating

Operational guidelines including protective gear, posture, and safe practices during use.

Trimmer Safety

Specific safety measures related to the trimmer head, cutting line, and associated risks.

Other Safety Warnings

Additional safety advice covering maintenance, cleaning, storage, and general unit handling.

Safety & International Symbols

Explanation of safety symbols and pictographs to ensure proper understanding of warnings.

Know Your Unit

Applications

Lists the intended uses of the trimmer, such as cutting grass, edging, and decorative trimming.

Assembly Tools Required

Identifies the specific tools needed for the assembly process of the unit.

Specifications

Assembly

Installing the Cutting Head Shield (For curved-shaft units)

Steps to attach the cutting head shield securely to curved-shaft models.

Installing the Cutting Head Shield (For straight-shaft units)

Steps to attach the cutting head shield securely to straight-shaft models.

Connecting the Upper and Lower Shafts

Instructions for properly joining the upper and lower sections of the unit's shaft.

Handle Assembly

General instructions for attaching and positioning the unit's handle.

Installing and Adjusting the Handle (Handle Type A)

Specific guidance for installing and adjusting the handle on Type A models.

Installing and Adjusting the Handle (Handle Type B)

Specific guidance for installing and adjusting the handle on Type B models.

Oil and Fuel

Oil and Fuel Mixing Instructions

Detailed instructions for preparing the correct fuel-oil mixture for optimal engine performance.

Using Blended Fuels

Recommendations and precautions for using blended fuels, including the use of additives.

Using Fuel Additives

Information on the purpose and application of fuel additives for engine protection.

Fueling the Unit

Step-by-step guide for safely and correctly refueling the unit.

Starting and Stopping

Starting Instructions

Comprehensive procedure for starting the unit's engine, including priming and choke operation.

Stopping Instructions

Clear steps for safely shutting down the engine and the unit.

Operation

Holding the Unit

Proper techniques for holding and balancing the unit during operation for safety and control.

Adjusting the Trimming Line Length

Method to extend the trimming line by tapping the bump knob during operation.

Maintenance

Maintenance Schedule

A schedule outlining required maintenance tasks and their recommended frequencies.

Replacing the Trimming Line

Reference to detailed instructions for replacing the trimmer line.

Maintaining the Air Filter

Procedures for cleaning and maintaining the air filter to ensure proper engine function.

Adjusting the Idle Speed

Steps to adjust the engine's idle speed for smooth operation.

Maintaining the Spark Plug

Instructions for inspecting, cleaning, and setting the gap on the spark plug.

Cleaning and Storage

Cleaning

Guidelines for cleaning the exterior of the unit safely and effectively.

Storage

Instructions for proper storage of the unit for both short-term and long-term periods.

Preparing the Unit for Use after Long-term Storage

Steps to ready the unit for operation after it has been stored for an extended duration.

Troubleshooting

The Engine Will Not Start

Common causes and solutions for the engine failing to start.

The Engine Will Not Idle

Troubleshooting steps for when the engine does not maintain a stable idle.

The Engine Will Not Accelerate

Solutions for issues preventing the engine from accelerating as expected.

The Engine Lacks Power or Stalls

Steps to diagnose and resolve problems with engine power loss or stalling.

The Cutting Head Will Not Advance Line (For Bump Heads Only)

Solutions for issues related to the cutting head not feeding new trimmer line.

The Cutting Line Advances Uncontrollably (For Bump Heads Only)

Solutions for problems where the trimmer line feeds out excessively or without control.

Bolens BL110 Specifications

General

Engine Displacement	25 cc
Engine Type	2-cycle
Cutting Swath	16 inches
Shaft Type	Straight
Power Source	Gasoline
Cutting System	Dual Line
Line Diameter	0.095 in
Type	Gas Trimmer