How to Troubleshoot a Husqvarna Lawnmower

Husqvarna lawn mowers, when running properly, help you navigate around trees when cutting the lawn.

Cutting the lawn is just one of those summer chores that have to be done. However, if your Husqvarna lawn mower isn't performing well, trying to complete this chore can be frustrating. Even with limited experience, try plenty of different things to attempt to solve the problem before calling in a professional. Fixing the problem yourself can save both time and money while giving you a feeling of satisfaction.

Instructions

1. Check the fuel supply. An empty tank, stale fuel or water in the tank will keep the lawn mower from starting. Before starting the motor, ensure the fuel valve lever is turned "On."

2. Check the oil level, as too much oil in the engine may cause the machine to lose power.

3. Look for debris in the air filter. A blocked filter can keep the mower from starting or cause it to lose power when mowing.

4. Examine the spark plug and ensure it works and connects properly. Bad or loose spark plugs don't work, and the machine will not start.

5. Check the battery is fully charged and connected to the engine or the mower will not start.

6. Adjust the wheels so they are the same height and high enough off the ground that the undercarriage does not drag, otherwise the lawn length may be uneven or the mower may become difficult to push.

7. Examine the position of the cutting height lever, on the left side above the front wheel, if the grass is the wrong length. A low height setting will keep the mower from catching grass clippings.

8. Inspect the blade and the blade adapter. If they are loose, the machine will not start. A damaged or worn blade can make the starter rope hard to pull, cause uneven cuts, make the machine loose power or cause excessive vibration. If the lift on the blade has been worn off, the grass catcher will not fill properly. A buildup of clippings and other debris may cause the mower to lose power or make uneven cuts.

9. Check the belt. If it is damaged or off the pulley, it may cause the mower to move slowly or improperly.

10. Examine the crankshaft, if damaged it can cause excessive vibration.

11. Check the grass catcher is clean, otherwise it may stop venting air and won't be able to fill properly.

Tips & Warnings

• Hold the control bar when starting the mower, failure to do so will cause the starter rope to be hard to pull or keep the machine from starting. Reduce the cutting speed if you are having trouble keeping up to the mower.Adjust the height of the handle so the mower is less difficult to push.

• Turn off the mower before you attempt to work on it. Wear gloves when working on the blade of the mower.

References

• Husqvarna 5R21HV: Owner's Manual
• Husqvarna 5521CM: Owner's Manual
• Husqvarna Rotary Lawn Mower: Owner's Manual