Jonsered L2621 - User Manual

Questions and Answers:

H
Hannah RomeroAug 2, 2025
Why my Jonsered L2621 does not start?
- L
  Lori CalderonAug 2, 2025
  There are several reasons why your Jonsered Lawn Mower might not start. It could be due to an incorrect starting procedure. Refer to the starting and stopping instructions. Other potential causes include a clogged air filter (clean or replace it), an empty fuel tank (refill it), a defective spark plug (replace it), a disconnected spark plug cable (check the connection), a loose or broken blade adapter (tighten the blade bolt or replace the adapter), a defective operator presence control bar (contact an authorized service workshop), the fuel valve lever being in the OFF position (turn it to ON), low battery voltage (charge the battery), incorrect battery connection (connect the battery to the engine), or a blown fuse (replace the fuse).
R
Robert CampbellAug 6, 2025
Why Jonsered Lawn Mower has less power?
- W
  William Henderson Jr.Aug 6, 2025
  If your Jonsered Lawn Mower is producing less power, several factors could be responsible. The cutting height may be too low, so try raising it. A clogged air filter can also reduce power, so clean or replace it. Buildup of grass, leaves, and trash under the mower can hinder performance; clean the underside of the mower housing. Excess oil in the engine can also cause this issue, so check the engine’s oil level. Finally, your walking speed might be too fast, so try cutting at a slower pace.
P
phurleyAug 10, 2025
What to do if difficult to push Jonsered Lawn Mower forward?
- M
  Mary CarterAug 11, 2025
  If you're finding it difficult to push your Jonsered Lawn Mower forward, it could be due to several reasons. You might be cutting extremely tall grass, so try raising the cutting height. The grass catcher might be too full, so empty it. Also, the handle height might not be right for you, so adjust it if your mower is equipped with that feature.
K
Kari RamseyAug 14, 2025
Why Jonsered L2621 is uneven mowing?
- A
  Ana MartinAug 15, 2025
  Uneven mowing with your Jonsered Lawn Mower can stem from a few issues. Check the blade for wear, bends, or looseness; replace it if bent or damaged. Ensure all wheel heights are set evenly. Also, buildup of grass, leaves, and trash under the mower can cause this problem; clean the underside of the mower housing.
J
Joseph EverettAug 19, 2025
Why Jonsered Lawn Mower has excessive vibrations?
- S
  steven03Aug 19, 2025
  Excessive vibrations in your Jonsered Lawn Mower can be caused by a worn, bent, or loose blade. Replace the blade if it is bent or damaged. Alternatively, a bent engine crankshaft could be the cause, in which case you should contact an authorized service workshop.
G
George GallagherAug 23, 2025
Why Jonsered L2621 starter rope hard to pull?
- K
  Kayla ScottAug 23, 2025
  If the starter rope on your Jonsered Lawn Mower is hard to pull, it could be due to a few reasons. The engine flywheel brake might be engaged when the operator presence control bar is released; depress the control bar to the upper handle before pulling the rope. A bent engine crankshaft could also be the cause, requiring you to contact an authorized service workshop. Alternatively, the blade adapter might be broken, in which case you should contact your service agent. Finally, ensure you are using the correct starting procedure; refer to the starting and stopping instructions.
J
Jerry TerryAug 27, 2025
What to do if grass catcher not filling on Jonsered Lawn Mower?
- K
  kjohnsonAug 28, 2025
  If the grass catcher on your Jonsered Lawn Mower isn't filling properly, it could be due to a few reasons. The cutting height might be too low, so try raising it. A worn blade can also cause this issue, so replace the blade. Lastly, the catcher might not be venting air properly, so clean or inspect the grass catcher.

Jonsered L2621 Specifications

General

Cutting Width	21 in
Engine	Briggs & Stratton
Displacement	163 cc
Cutting Height Adjustment	4-point
Fuel Tank Capacity	1.6 qt
Weight	62 lbs
Engine Type	4-stroke

Summary

Safety Rules

Children Safety

Safety precautions for children around lawn mowers.

General Operation

Guidelines for safe and proper operation of the lawn mower.

Slope Operation

Safety advice for mowing on slopes and inclines.

Safe Handling of Gasoline

Precautions for storing and using gasoline safely.

General Service Safety

Safety guidelines related to maintaining and servicing the machine.

Key to Symbols

Explanation of Warning Levels

Defines the different warning symbols and their severity.

Presentation

Customer Responsibilities

Outlines the operator's duties regarding safety and maintenance.

The Lawn Mower

Provides basic information about the lawn mower.

Product Specifications

Lists technical details like oil type, capacity, and spark plug.

Steps Before Using a New Lawn Mower

Important checks and actions before operating the mower for the first time.

What is What?

What is What on the Lawn Mower

Identifies and labels the main parts of the lawn mower.

Machines Safety Equipment

General Safety Equipment

Explains the purpose of safety features and their maintenance.

Operator Presence Control Bar

Details the function and check of the operator presence control bar.

Muffler Safety

Explains the muffler's function, heat hazard, and inspection.

Assembling and Adjustments

General Assembly

Covers general assembly precautions and unpacking.

Install Electric Start Module

Step-by-step guide to installing the electric start module.

Handle Assembly and Adjustment

Instructions for operating position and tightening the handle.

Vertical Handle Storage

How to set the handle in a vertical storage position.

Storage;Transport Position

Instructions for folding the handle for transport or storage.

Grass Catcher Assembly

Steps to assemble the grass catcher.

Starter Handle Installation

Guide on how to install the starter handle.

Convert Lawn Mower Modes

Explains how to switch between mulching, bagging, and discharging.

Rear Bagging Setup

Instructions for setting up the mower for rear bagging.

Mulching Setup

Instructions for setting up the mower for mulching.

Rear-Side Discharging Setup

Instructions for setting up the mower for side discharging.

Cutting Height Adjustment

How to adjust the cutting height for different lawn conditions.

Filling with Oil

Instructions on how to fill the engine with oil.

Fuel Handling

General Fuel Safety

Safety precautions when handling fuel and engine exhaust.

Fueling Instructions

Step-by-step guide for refueling the lawn mower safely.

Engine Oil Check

How to check the engine oil level.

Transport and Storage

Guidelines for safely transporting and storing the mower and fuel.

Battery

Prepare the Battery

Instructions for charging and preparing the battery for use.

Operating

Personal Protective Equipment

Details the required PPE for safe operation.

General Safety Precautions

Basic safety rules and responsibilities for operating the machine.

Children Safety

Safety measures to protect children from the mower.

Use Common Sense

Emphasizes using caution and seeking advice when unsure.

Work Area Safety

Precautions for ensuring a safe mowing environment.

Work Safety

General safety practices during operation.

Basic Working Techniques

Tips for effective and safe mowing techniques.

Slope Operation

Specific safety advice for mowing on slopes.

Transport and Storage

Guidelines for safely transporting and storing the mower.

Starting and Stopping

Instructions on how to start and stop the engine safely.

Electric Start Procedure

Steps to start the mower using the electric start feature.

Manual Start Procedure

Steps for starting the mower manually.

Drive System Operation

How to control the self-propelling drive system.

Maintenance

General Maintenance

Overview of maintenance responsibilities and the schedule.

Maintenance Schedule

A table outlining maintenance tasks and their intervals.

General Recommendations

Advice on maintaining the mower for warranty and longevity.

General Inspection

Checks to perform before each use.

General Lubrication

Guidance on lubricating moving parts and bearings.

Cleaning Procedures

Instructions for cleaning the lawn mower.

Engine Lubrication

How to lubricate the engine and select oil.

Engine Oil Level Check

Step-by-step guide to checking the engine oil level.

Adding Engine Oil

Instructions for adding oil to the engine.

Engine Oil Change

Procedure for draining and changing the engine oil.

Spark Plug Replacement

How and when to replace the spark plug.

Air Filter Maintenance

Instructions for cleaning and replacing the air filter.

Blade Maintenance

Replacing the Blades

Step-by-step guide for replacing the mower blade.

Blade Assembly

Instructions for correctly mounting the new blade.

Drive Belt Maintenance

Remove the Drive Belt

Steps to safely remove the drive belt.

Replace the Drive Belt

Guide for installing a new drive belt.

Troubleshooting

Troubleshooting Schedule

A table listing common problems, causes, and solutions.

Related product manuals

Jonsered L2621 - User Manual

Table of Contents

Questions and Answers:

Jonsered L2621 Specifications

Summary

Safety Rules

Children Safety

General Operation

Slope Operation

Safe Handling of Gasoline

General Service Safety

Key to Symbols

Explanation of Warning Levels

Presentation

Customer Responsibilities

The Lawn Mower

Product Specifications

Steps Before Using a New Lawn Mower

What is What?

What is What on the Lawn Mower

Machines Safety Equipment

General Safety Equipment

Operator Presence Control Bar

Muffler Safety

Assembling and Adjustments

General Assembly

Install Electric Start Module

Handle Assembly and Adjustment

Vertical Handle Storage

Storage;Transport Position

Grass Catcher Assembly

Starter Handle Installation

Convert Lawn Mower Modes

Rear Bagging Setup

Mulching Setup

Rear-Side Discharging Setup

Cutting Height Adjustment

Filling with Oil

Fuel Handling

General Fuel Safety

Fueling Instructions

Engine Oil Check

Transport and Storage

Battery

Prepare the Battery

Operating

Personal Protective Equipment

General Safety Precautions

Children Safety

Use Common Sense

Work Area Safety

Work Safety

Basic Working Techniques

Slope Operation

Transport and Storage

Starting and Stopping

Electric Start Procedure

Manual Start Procedure

Drive System Operation

Maintenance

General Maintenance

Maintenance Schedule

General Recommendations

General Inspection

General Lubrication

Cleaning Procedures

Engine Lubrication

Engine Oil Level Check

Adding Engine Oil

Engine Oil Change

Spark Plug Replacement

Air Filter Maintenance

Blade Maintenance

Replacing the Blades

Blade Assembly

Drive Belt Maintenance

Remove the Drive Belt

Replace the Drive Belt

Troubleshooting

Troubleshooting Schedule