Jonsered J621ES User Manual (English)

Questions and Answers:

V
Valerie JohnsonAug 16, 2025
Why is my Jonsered Snow Blower losing power?
- G
  geraldrobertsAug 16, 2025
  Loss of power in your Jonsered Snow Blower can be caused by several factors. The spark plug wire might be loose, so reconnect it. If you are throwing too much snow, reduce the speed and width of the swath. Check if the fuel tank cap is covered with ice or snow and remove it. A dirty or clogged muffler can also cause power loss, so clean or replace it. Finally, improper cable length can be a factor, so adjust the cable. A blocked muffler or carburetor air intake can also cause power loss, so clear the blockage, ensuring the engine is cool.
M
Michael CookAug 20, 2025
What to do if Jonsered J621ES engine idles or runs roughly?
- V
  Veronica PattonAug 20, 2025
  If your Jonsered Snow Blower engine idles or runs roughly, first ensure the choke is not in the FULL position; move it to the OFF position. Check for any blockage in the fuel line and clean it. Stale fuel or water in the fuel can also cause this issue; empty the fuel tank and carburetor, then refill with fresh, clean gasoline. Finally, belt stretch may be the problem, replace the auger v-belt.
E
Erik SalazarAug 25, 2025
What to do if Jonsered Snow Blower has loss of snow discharge or slowing of snow discharge?
- J
  jesse51Aug 26, 2025
  If you experience a loss or slowing of snow discharge with your Jonsered Snow Blower, consider these potential causes: a worn belt (adjust the drive cable per maintenance procedures), the auger v-belt being off the pulley (check and reinstall it), a worn auger v-belt (check and replace it), a clogged discharge chute (clean it), or jammed augers/impeller (remove any debris or foreign objects).
H
Heather FloresAug 27, 2025
What causes excessive vibration or handle movement in Jonsered J621ES Snow Blower?
- T
  Troy LiuAug 28, 2025
  Excessive vibration or handle movement in your Jonsered Snow Blower can be attributed to a few reasons: loose parts or damaged augers or impeller (tighten all fasteners and replace any damaged parts), handles not positioned correctly (ensure handles are locked into position), or adjustment lever nuts being loose (tighten the nuts until the handle feels secure).
H
hrobinsonSep 1, 2025
How to fix a Jonsered J621ES Snow Blower rotator that is hard to move?
- W
  walter65Sep 1, 2025
  If the rotator on your Jonsered Snow Blower is hard to move, it could be due to debris in the chute rotator mechanism, so clean the internal parts. Alternatively, the cables might be kinked or damaged; ensure they are not kinked and replace any damaged cables.
B
Barry MyersSep 4, 2025
What to do if lights are not On (If Equipped) on Jonsered J621ES?
- J
  Joanne MasonSep 5, 2025
  If the lights on your Jonsered Snow Blower are not turning on (if equipped), the motor might not be running, so start the engine. Also, check for loose wire connections at the engine and both lights, and secure them. Finally, the LED might be burnt out, and you'll need to replace the LED light module.
M
mathewharrisonSep 8, 2025
Why is the recoil starter hard to pull on my Jonsered Snow Blower?
- A
  Anthony RobinsonSep 8, 2025
  The recoil starter on your Jonsered Snow Blower might be hard to pull because the recoil starter is frozen. Also, the rope might be interfering with components, so ensure the recoil rope should not be touching any wires or hoses.

Jonsered J621ES Specifications

General

Manufacturer	Jonsered
Type	Snow Blower
Clearing Width	21 inches
Power Output	6.5 hp
Carburetor	Diaphragm
Starter System	Recoil
Ignition System	Electronic
Intake Width	21 inches
Intake Height	20 inches
Throw Distance	up to 30 feet
Chute Rotation	180 degrees
Chute Material	Plastic
Auger Material	Steel

Summary

Jonsered J621ES Snow Thrower Manual

Manual Overview and Safety Warning

Introduction to the owner's manual and critical safety warning.

Safe Operation Practices

Operator Training Guidelines

Essential training steps before operating the snow thrower.

Pre-Operation Preparation Steps

Steps to prepare the area and equipment before use.

Snow Thrower Operation

Maintenance and Storage Schedule

Schedule and procedures for maintaining and storing the snow thrower.

Know Your Snow Thrower

Safety Symbols and Decals Explained

Explanation of symbols and decals used in the manual and on the machine.

Snow Thrower Setup

Loose Parts Verification Chart

Chart to verify all shipped parts are present before assembly.

Handle and Discharge Chute Installation

Step-by-step guide for assembling the handle and discharge chute.

Product Overview and Engine Oil Filling

Product Components Identification Diagram

Diagram identifying key parts of the snow thrower.

Filling the Engine with Oil Procedure

Procedure for adding the correct type and amount of engine oil.

Fueling and Oil Level Check

Filling the Fuel Tank Safely

Instructions on safely filling the fuel tank with appropriate gasoline.

Checking Engine Oil Level Procedure

Procedure for checking and maintaining the correct engine oil level.

Starting the Snow Thrower Engine

Ignition Key, Choke, and Primer Operation

Steps for using the key, choke, and primer to start the engine.

Electric Start Operation

How to use the electric start for engine ignition.

Auger Control Operations

Engaging the Auger Blades

How to engage the auger blades using the control bar.

Disengaging the Auger Blades

How to disengage the auger blades by releasing the control bar.

Stopping and Adjusting Components

Stopping the Engine Safely

Procedure for safely stopping the snow thrower engine.

Adjusting Discharge Chute and Deflector

How to adjust the direction and angle of snow discharge.

Operating Tips and Freeze Prevention

Clearing a Clogged Discharge Chute

Safe procedure for clearing obstructions from the discharge chute.

Preventing Freeze-up After Use

Steps to prevent snow thrower parts from freezing after operation.

Maintenance Schedule

Regular Maintenance Tasks Checklist

Checklist of maintenance tasks to perform before, during, and after use.

Control Cable and Auger Inspection

Adjusting the Control Cable

How to adjust the control cable for proper operation.

Inspecting Auger Blades and Scraper Bar

Checking wear on auger blades and scraper bar for optimal performance.

Changing the Engine Oil

Engine Oil Draining Procedure

Steps to safely drain used engine oil after warming.

Refilling Engine Oil Procedure

Procedure for refilling the engine with the correct type and amount of oil.

Servicing the Spark Plug

Spark Plug Removal and Cleaning

Steps for removing and cleaning the spark plug.

Spark Plug Installation and Gapping

How to install and set the correct gap for the spark plug.

Replacing the Drive Belt

Drive Belt Removal Procedure

Steps for removing the old drive belt.

Installing the New Drive Belt

How to install a new drive belt correctly.

Snow Thrower Storage

Fuel System Preparation for Storage

Steps to prepare the fuel system for long-term storage.

Engine and Cylinder Storage Procedures

Procedures for storing the engine and cylinder to prevent damage.

Troubleshooting Common Issues

Engine Starting Problems and Solutions

Causes and corrections for the engine not starting.

Performance and Operation Issues Troubleshooting

Solutions for loss of power, rough running, and vibration.

Service Notes

Auger Assembly Parts Breakdown

Auger Assembly Components List

List of parts for the auger assembly.

Chute Assembly Parts Breakdown

Chute Assembly Components List

List of parts for the chute assembly.

Handle Assembly Parts Breakdown

Handle Assembly Components List

List of parts for the handle assembly.

Drive Assembly Parts Breakdown

Drive Assembly Components List

List of parts for the drive assembly.

Engine Assembly Parts Breakdown

Engine Assembly Components List

List of parts for the engine assembly.

Frame Assembly Parts Breakdown

Frame Assembly Components List

List of parts for the frame assembly.

Shroud Assembly Parts Breakdown

Shroud Assembly Components List

List of parts for the shroud assembly.

Shroud Assembly Parts Breakdown (Continued)

Shroud Assembly Components List (Continued)